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Motorola MC68838 User Manual page 4

Media access controller
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Table of Contents
TABLE OF CONTENTS (Continued)
Paragraph
Number
3.2.3
Receive Status Register (RX_STATUS)................................................. 3-13
3.2.4
Transmit Status Register (TX_STATUS)................................................ 3-15
3.3
Interrupt Registers........................................................................................... 3-17
3.3.1
Interrupt Event Register A (INTR_EVENT_A) ........................................ 3-17
3.3.2
Interrupt Event Register B (INTR_EVENT_B) ........................................ 3-20
3.3.3
Interrupt Event Register C (INTR_EVENT_C)........................................ 3-23
3.3.4
Interrupt Mask Register A (INTR_MASK_A)........................................... 3-23
3.3.5
Interrupt Mask Register B (INTR_MASK_B)........................................... 3-23
3.3.6
Interrupt Mask Register C (INTR_MASK_C).......................................... 3-23
3.4
Counter Registers........................................................................................... 3-24
3.4.1
Frame Count Register (FRAME_CT)....................................................... 3-25
3.4.2
Lost Count, Error Count Register (LOST_CTERROR_CT) ................. 3-25
3.4.3
Token Count Register (TOKEN_CT) ....................................................... 3-25
3.5
Station Parameter Registers......................................................................... 3-25
3.5.1
My Short Address Register (MSA)........................................................... 3-25
3.5.2
3.5.3
Target Request Time Register (T_REQ) ................................................. 3-26
3.5.4
3.6
Protocol Timing Registers ............................................................................. 3-27
3.6.1
TVX Timer Register (TVX_TIMER)........................................................... 3-27
3.6.2
TRT Timer Register (TRT_TIMER_A, TRT_TIMER_B).......................... 3-27
3.6.3
THT_TIMER_B, SENT_COUNT).............................................................. 3-28
3.6.4
3.6.5
Information Field Register (INFO_REG_A)............................................. 3-29
3.6.6
Void Time Counter Register (VOID_TIME)............................................. 3-29
3.7
Internal Registers............................................................................................ 3-30
3.7.1
Revision Number Register (REV_NO_REG).......................................... 3-30
3.7.2
Packet Request Register (PKT_REQUEST) .......................................... 3-30
3.7.3
3.7.4
Receive CRC Register (RX_CRC) ........................................................... 3-32
3.7.5
Transmit CRC Registers (TX_CRC)......................................................... 3-32
4.1
Clock Signals .................................................................................................. 4-1
4.2
Node Processor Interface.............................................................................. 4-2
4.3
MAC-PHY Interface ........................................................................................ 4-3
4.4
Receive System Interface.............................................................................. 4-3
4.5
Transmit System Interface............................................................................. 4-4
4.6
CAM Interface.................................................................................................. 4-5
4.7
Test Signals..................................................................................................... 4-6
iv
Title
Section 4
MC68838 USER'S MANUAL
P a g e
Number
MOTOROLA

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