Motorola MC68838 Manuals

Manuals and User Guides for Motorola MC68838. We have 1 Motorola MC68838 manual available for free PDF download: User Manual

Motorola MC68838 User Manual

Motorola MC68838 User Manual (100 pages)

Media Access Controller  
Brand: Motorola | Category: IP Access Controllers | Size: 0.48 MB
Table of contents
Table Of Contents3................................................................................................................................................................
Introduction11................................................................................................................................................................
Overview12................................................................................................................................................................
Chip Features12................................................................................................................................................................
Functional Description13................................................................................................................................................................
Node Processor Interface Logic13................................................................................................................................................................
Receive Data Path13................................................................................................................................................................
Receive Latch14................................................................................................................................................................
Receive Crc Checker15................................................................................................................................................................
Sent Count15................................................................................................................................................................
Counters15................................................................................................................................................................
Receive Finite State Machine15................................................................................................................................................................
Address Comparator16................................................................................................................................................................
Receive Host Interface16................................................................................................................................................................
Transmit Data Path16................................................................................................................................................................
Transmit Data Host Lnterface17................................................................................................................................................................
Send Frame Logic17................................................................................................................................................................
Capture Token Logic17................................................................................................................................................................
Transmit Crc Generator18................................................................................................................................................................
Transmit Finite State Machine18................................................................................................................................................................
Timers18................................................................................................................................................................
Transmit Data Latch (and Repeat Function)19................................................................................................................................................................
Test And Clock Logic19................................................................................................................................................................
Register Description21................................................................................................................................................................
Register Types23................................................................................................................................................................
Read/write Registers23................................................................................................................................................................
Read/control Write Registers23................................................................................................................................................................
Read-only/clear Registers23................................................................................................................................................................
Read-only Registers23................................................................................................................................................................
Control And Status Registers24................................................................................................................................................................
Control Register B (mac_cntrl_b)28................................................................................................................................................................
Receive Status Register (rx_status)33................................................................................................................................................................
Transmit Status Register (tx_status)35................................................................................................................................................................
Interrupt Registers37................................................................................................................................................................
Interrupt Event Register A (intr_event_a)37................................................................................................................................................................
Interrupt Event Register B (intr_event_b)40................................................................................................................................................................
Interrupt Event Register C (intr_event_c)43................................................................................................................................................................
Interrupt Mask Register A (intr_mask_a)43................................................................................................................................................................
Interrupt Mask Register C (intr_mask_c)43................................................................................................................................................................
Counter Registers44................................................................................................................................................................
Token Count Register (token_ct)45................................................................................................................................................................
Station Parameter Registers45................................................................................................................................................................
My Short Address Register (msa)45................................................................................................................................................................
Frame Count Register (frame_ct)45................................................................................................................................................................
My Long Address Register (mla_a, Mla_b, Mla_c)46................................................................................................................................................................
Target Request Time Register (t_req)46................................................................................................................................................................
Tvx, Trt Initial Timer Parameter Register (tvx_value, T_max)46................................................................................................................................................................
Protocol Timing Registers47................................................................................................................................................................
Tvx Timer Register (tvx_timer)47................................................................................................................................................................
Trt Timer Register (trt_timer_a, Trt_timer_b)47................................................................................................................................................................
Tht Timer, Sent Count Registers49................................................................................................................................................................
Trt Time Remaining Register (t_neg_a, T_neg_b)50................................................................................................................................................................
Information Field Register (info_reg_a)50................................................................................................................................................................
Void Time Counter Register (void_time)50................................................................................................................................................................
Internal Registers51................................................................................................................................................................
Revision Number Register (rev_no_reg)51................................................................................................................................................................
Packet Request Register (pkt_request)51................................................................................................................................................................
Built-in Self-test Signature Register (bist_signature)52................................................................................................................................................................
Receive Crc Register (rx_crc)53................................................................................................................................................................
Transmit Crc Registers (tx_crc)53................................................................................................................................................................
Signal Description54................................................................................................................................................................
Clock Signals54................................................................................................................................................................
Node Processor Interface55................................................................................................................................................................
Mac-phy Interface56................................................................................................................................................................
Receive System Interface56................................................................................................................................................................
Transmit System Interface57................................................................................................................................................................
Cam Interface58................................................................................................................................................................
Test Signals59................................................................................................................................................................
Bus Operation60................................................................................................................................................................
Npi Operation60................................................................................................................................................................
Read Cycle60................................................................................................................................................................
Write Cycle62................................................................................................................................................................
Mac-phy Interface Operation64................................................................................................................................................................
Receive Data Path Operation66................................................................................................................................................................
Receive Data Processing66................................................................................................................................................................
Receive Data System Interface66................................................................................................................................................................
Transmit Data Path Operation71................................................................................................................................................................
Transmit Data Path Control71................................................................................................................................................................
Mac Packet Transmission73................................................................................................................................................................
Packet Request Header74................................................................................................................................................................
Cam Interface Operation77................................................................................................................................................................
Normal (nonextended) Match Mode77................................................................................................................................................................
Extended Match Mode78................................................................................................................................................................
Extensions To A And C Bit Handling80................................................................................................................................................................
Test Operation83................................................................................................................................................................
Built-in Self-test Operation83................................................................................................................................................................
Scan Path Operation84................................................................................................................................................................
Maximum Ratings87................................................................................................................................................................
Recommended Operating Conditions87................................................................................................................................................................
Thermal Characteristics87................................................................................................................................................................
Electrical Characteristics87................................................................................................................................................................
Node Processor Interface Timing88................................................................................................................................................................
Mac-fsi Timing90................................................................................................................................................................
Mac-elm Timing91................................................................................................................................................................
Cam Interface Timing92................................................................................................................................................................
Ordering Information And Mechanical Data93................................................................................................................................................................
Ordering Information93................................................................................................................................................................
Pin Assignments94................................................................................................................................................................
120-lead Ceramic Pin Grid Array W/ceramic Lid (kb)94................................................................................................................................................................
120-lead Plastic Quad Gull Wing (fc)95................................................................................................................................................................
Package Dimensions96................................................................................................................................................................

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