M1523 Block Diagram - Texas Instruments Extensa 60x Series Maintenance Manual

M1523 Block Diagram

PWG
CPURST
RSTDRV
Clock & Reset
OSC14M
PCICLK
CBEJ[3:0]
PCI BUS
AD[31:0]
Interface
FRAMEJ
TRDYJ UNIT
IRDYJ
STOPJ
PCI
DEVSELJ
Arbiter
SERRJ
PAR Interface
PHOLDJ
PHLDAJ ISA
FERRJ Interrupt
IRQ[15:14]
UNIT
IRQ[11:3]
INTAJ/M1II
PCI
NTBJ/S0
Interrupt
INTCJ/S1
INTDJ/S2
UNIT
IGNNEJ
CPU
INTR
NMI
Interface
A20MJ
USBCLK USB
USBP[11:10]
Interface
(reserved)
IDRQ[0:1]
IDAKJ[0:1]
IDERDY
PCI
IDEIORJ
IDE
IDEIOWJ
IDESCS3J
Master
IDESCS1J
Interface
IDEPCS3J
IDEPCS1J
IDE_A[2:0]
IDE_D[15:0]
Figure 4-4 M1523 Chip Simplified Block Diagram
DATA
Buffer
Control ISA BUS
Interface
Address
Buffer
PMU or APIC
Interface
Decoder
Keyboard
Controller
SD[15:8]
XD[7:0]
SA[19:0]
SBHEJ
LA[23:17]
IO16J
M16J
MEMRJ
MEMWJ
AEN
IOCHRDYJ
UNIT
NOWSJ
IOCHKJ
SYSCLK
BALE
IORJ
IOWJ
SMEMRJ/LMEGJ
SMEMWJ/RTCAS
EXTSW
Timer
STPCLKJ
UNIT
SPKR
SIRQI
MISC.
XDIR
Logic
SPLED
ROMCSJ
REAL
SIRQII
Time
RTC32KI
RTC32KII
Clock
KBINH/IRQ1
PS2/AT
KBCLK/KBCSJ
KBDATA
MSCLK
IRQ12/MDATA
DREQ[7:5]
DMA
DREQ[3:0]
DACKJ[7:5]
Refresh
DACK2J/3J
UNIT
TC
REFSHJ
Theory of Operation 4-11