AMD Elan SC520 - Figure 13-1 GP Bus Controller System Block Diagram

General-Purpose Bus Controller
13-2 Élan™SC520 Microcontroller User’s Manual
Figure 13-1 GP Bus Controller System Block Diagram
GP Bus
Control
State Machine
GPMEMRD
GPMEMWR
GPIORD
GPIOWR
GPDACK3 –
GPTC*
GPIOCS16*
GPMEMCS16
*
GPALE*
GPBHE*
GPDRQ3 –
GPRDY*
GPAEN*
MUX
Programmable
WDT UART1 UART2
PIC
RTC
Internal GP B us
PIO
GPCS7 –
GPDRQ0*
33 MHz
m/io
r/w
GPDBUFOE*
Reset
GPRESET
bs8
bs16
be3 – be0
Divider
MUX
dior, diow,
gior
, giow,
gmemr, gmemw,
gaen
dmemr
, dmemw,
daen
Echo mode select
gp_sel
GPA25–GPA0
GPD15–GPD0
GPCS0*
Timers
GPIRQ10 –
GPIRQ0,
ior, iow, memr, memw,
From CPU:
GP-DMA
State Machine
GPDACK0
*
Configuration
Registers
Programmable
Interface
Timing
Control
Élan™SC520 Microcontroller
GP Bus Controller
SSI
INTA–INTD
GP-DMA
*Multiplexed pins