398 AMD Geodeā„¢ SC2200 Processor Data Book
Electrical Specifications
32580B
tRDYA2 IOCHRDY valid after IOR#/MEMR#/
RD#/DOCR#/IOW#/MEMW#/WR#/
DOCW# FE
8 M, I/O 366 9-19
9-20
tIOCSA IOCS[1:0]#/DOCS#/ROMCS# driven
active from A[23:0] valid
8, 16 M, I/O 34 9-19
9-20
tIOCSH IOCS[1:0]#/DOCS#/ROMCS# valid
Hold after A[23:0] invalid
8, 16 M, I/O 0 9-19
9-20
tAR1 A[23:0]/BHE# valid before MEMR#/
DOCR# active
16 M 34 9-19
tAR2 A[23:0]/BHE# valid before IOR#
active
16 I/O 10 0 9-19
tAR3 A[23:0]/BHE# valid before MEMR#/
DOCR#/IOR# active
8 M, I/O 100 9-19
tRA A[23:0]/BHE# valid Hold after
MEMR#/DOCR#/IOR# inactive
8, 16 M, I/O 25 9-19
tRVDS Read data D[15:0] valid setup before
MEMR#/DOCR#/IOR# inactive
8, 16 M, I/O 24 9-19
tRDH Read data D[15:0] valid Hold after
MEMR#/DOCR#/IOR# inactive
8, 16 M, I/O 0 9-19
tHZ Read data floating after MEMR#/
DOCR#/IOR# inactive
8, 16 M, I/O 41 9-19
tAW1 A[23:0]/BHE# valid before MEMW#/
DOCW# active
16 M 34 9-20
tAW2 A[23:0]/BHE# valid before IOW#
active
16 I/O 10 0 9-20
tAW3 A[23:0]/BHE# valid before MEMW#/
DOCW#/IOW# active
8 M, I/O 100 9-20
tWA A[23:0]/BHE# valid Hold after
MEMW#/DOCW#/IOW# invalid
8, 16 M, I/O 25 9-20
tDV1 Write data D[15:0] valid after
MEMW#/DOCW# active
8, 16 M 40 9-20
tDV2 Write data D[15:0] valid after IOW#
active
8 I /O 40 9-20
tDV3 Write data D[15:0] valid after IOW#
active
16 I/O -23 9-20
tWTR TRDE# inactive after MEMW#/
DOCW#/IOW# inactive
8, 16 M, I/O 20 9-20
tDH Write data D[15:0] after MEMW#/
DOCW#/IOW# inactive
8, 16 M, I/O 45 9-20
tDF Write data D[15:0] goes TRI-STATE
after MEMW#/DOCW#/IOW# inactive
8, 16 M, I/O 105 9-20
tWDAR Write data D[15:0] after read MEMR#/
DOCR#/IOR#
8, 16 M, I/O 41 9-19
Table 9-22. Sub-ISA Timing Parameters (Continued)
Symbol Parameter
Bus
Width
(Bits) Type
Min
(ns)
Max
(ns) Figure Comments