Texas Instruments 60X - Manual (Page 57)

Theory of Operation 4-11
Figure 4-4 M1523 Chip Simplified Block Diagram
M 1523 Block Diagram
DATA
Buffer
Control
Address
Buffer
Decoder
Clock & Reset
PCI BUS
Interface
UNIT
PCI
Arbiter
Interface
ISA
Interrupt
UNIT
PCI
Interrupt
UNIT
CPU
Interface
USB
Interface
(reserved)
PCI
IDE
Master
Interface
ISA BUS
Interface
UNIT
DMA
Refresh
UNIT
PMU or APIC
Interface
PS2/AT
Keyboard
Controller
Timer
UNIT
MISC.
Logic
REAL
Time
Clock
PWG
CPURST
RSTDRV
OSC14M
PCICLK
CBEJ[3:0]
AD[31:0]
FRAMEJ
TRDYJ
IRDYJ
STOPJ
DEVSELJ
SERRJ
PAR
PHOLDJ
PHLDAJ
FERRJ
IRQ[15:14]
IRQ[11:3]
INTAJ/M1II
NTBJ/S0
INTCJ/S1
INTDJ/S2
IGNNEJ
INTR
NMI
A20MJ
USBCLK
USBP[11:10]
IDRQ[0:1]
IDAKJ[0:1]
IDERDY
IDEIORJ
IDEIOWJ
IDESCS3J
IDESCS1J
IDEPCS3J
IDEPCS1J
IDE_A[2:0]
IDE_D[15:0]
SD[15:8]
XD[7:0]
SA[19:0]
SBHEJ
LA[23:17]
IO16J
M16J
MEMRJ
MEMWJ
AEN
IOCHRDYJ
NOWSJ
IOCHKJ
SYSCLK
BALE
IORJ
IOWJ
SMEMRJ/LMEGJ
SMEMWJ/RTCAS
EXTSW
STPCLKJ
SPKR
SIRQI
XDIR
SPLED
ROMCSJ
SIRQII
RTC32KI
RTC32KII
KBINH/IRQ1
KBCLK/KBCSJ
KBDATA
MSCLK
IRQ12/MDATA
DREQ[7:5]
DREQ[3:0]
DACKJ[7:5]
DACK2J/3J
TC
REFSHJ