AMD Elan SC520 - Figure 13-7 Élansc520 Microcontroller Interfacing with an Am85 C30

General-Purpose Bus Controller
Élan™SC520 Microcontroller User’s Manual 13-15
Figure 13-7 Élan™SC520 Microcontroller Interfacing with an Am85C30
Table 13-6 Example AMD Enhanced Serial Communications Controller Interface Timing
1
Notes 
1. This example assumes that a 33.333-MHz crystal is being used in the system.
GP Bus
Signal Type
Offset
Register
Value
Offset
Time
(ns)
Chip
Require-
ment (ns)
Pulse
Width
Register
Value
Pulse
Width
(ns)
Chip
Require-
ment (ns)
Recovery
Time
Register
Value
Recovery
Timer
(ns)
Chip
Require-
ment (ns)
GP chip
selects
2 90 0 4 150 150 0 30 3.5
GP read 2 90 70 4 150 150 N/A N/A N/A
GP write 2 90 70 4 150 150 N/A N/A N/A
GPALE 0 30 N/A 0 30 N/A N/A N/A N/A
D7 – D0
RD
WR
A/B
CE
Am85C30
GPD7 – GPD0
GPIORD
GPIOWR
GPA1
GPCSx
INTGPIRQx
D/C
GPA0
Élan™SC520 Microcontroller