
AMD Geode SC1200/SC1201 Processor Data Book
395
Electrical Specifications
32579B
tRDYA2
IOCHRDY valid after IOR#/MEMR#/
RD#/DOCR#/IOW#/MEMW#/WR#/
DOCW# FE
8
M, I/O
366
tIOCSA
IOCS[1:0]#/DOCS#/ROMCS# driven
active from A[23:0] valid
8, 16
M, I/O
34
tIOCSH
IOCS[1:0]#/DOCS#/ROMCS# valid
hold after A[23:0] invalid
8, 16
M, I/O
0
tAR1
A[23:0]/BHE# valid before
MEMR#/DOCR# active
16
M
34
tAR2
A[23:0]/BHE# valid before IOR#
active
16
I/O
100
tAR3
A[23:0]/BHE# valid before
MEMR#/DOCR#/IOR# active
8
M, I/O
100
tRA
A[23:0]/BHE# valid hold after
MEMR#/DOCR#/IOR# inactive
8, 16
M, I/O
25
tRVDS
Read data D[15:0] valid setup before
MEMR#/DOCR#/IOR# inactive
8, 16
M, I/O
24
tRDH
Read data D[15:0] valid hold after
MEMR#/DOCR#/IOR# inactive
8, 16
M, I/O
0
tHZ
Read data floating after
MEMR#/DOCR#/IOR# inactive
8, 16
M, I/O
41
tAW1
A[23:0]/BHE# valid before
MEMW#/DOCW# active
16
M
34
tAW2
A[23:0]/BHE# valid before IOW#
active
16
I/O
100
tAW3
A[23:0]/BHE# valid before
MEMW#/DOCW#/IOW# active
8
M, I/O
100
tWA
A[23:0]/BHE# valid hold after
MEMW#/DOCW#/IOW# invalid
8, 16
M, I/O
25
tDV1
Write data D[15:0] valid after
MEMW#/DOCW# active
8, 16
M
40
tDV2
Write data D[15:0] valid after IOW#
active
8
I/O
40
tDV3
Write data D[15:0] valid after IOW#
active
16
I/O
-23
tWTR
TRDE# inactive after
MEMW#/DOCW#/IOW# inactive
8, 16
M, I/O
20
tDH
Write data D[15:0] after
MEMW#/DOCW#/IOW# inactive
8, 16
M, I/O
45
tDF
Write data D[15:0] goes TRI-STATE
after MEMW#/DOCW#/IOW# inactive
8, 16
M, I/O
105
tWDAR
Write data D[15:0] after read
MEMR#/DOCR#/IOR#
8, 16
M, I/O
41
Table 9-24. Sub-ISA Timing Parameters (Continued)
Symbol
Parameter
Bus
Width
(Bits)
Type
Min
(ns)
Max
(ns)
Figure
Comments