AMD SC1200 Benutzerhandbuch
394
AMD Geode™ SC1200/SC1201 Processor Data Book
Electrical Specifications
32579B
9.3.7
Sub-ISA Interface
All output timing is guaranteed for 50 pF load, unless otherwise specified. The ISA Clock divisor (defined in F0 Index
50h[2:0] of the Core Logic module) is 011.
50h[2:0] of the Core Logic module) is 011.
Table 9-24. Sub-ISA Timing Parameters
Symbol
Parameter
Bus
Width
(Bits)
Type
Min
(ns)
Max
(ns)
Figure
Comments
t
RD1
MEMR#/DOCR#/RD#/TRDE# read
active pulse width FE to RE
active pulse width FE to RE
16
M
225
Standard
t
RD2
MEMR#/DOCR#/RD#/TRDE# read
active pulse width FE to RE
active pulse width FE to RE
16
M
105
Zero wait state
t
RD3
IOR#/RD#/TRDE# read active pulse
width FE to RE
width FE to RE
16
I/O
160
Standard
t
RD4
IOR#/MEMR#/DOCR#/RD#/TRDE#
read active pulse width FE to RE
read active pulse width FE to RE
8
M, I/O
520
Standard
t
RD5
IOR#/MEMR#/DOCR#/RD#/TRDE#
read active pulse width FE to RE
read active pulse width FE to RE
8
M, I/O
160
Zero wait state
t
RCU1
MEMR#/DOCR#/RD#/TRDE#
inactive pulse width
inactive pulse width
16
M
103
t
RCU2
MEMR#/DOCR#/RD#/TRDE#
inactive pulse width
inactive pulse width
8
M
163
t
RCU3
IOR#/RD#/TRDE# inactive pulse
width
width
8, 16
I/O
163
t
WR1
MEMW#/WR# write active pulse
width FE to RE
width FE to RE
16
M
225
Standard
t
WR2
MEMW#/DOCW#/WR# write active
pulse width FE to RE
pulse width FE to RE
16
M
105
Zero wait state
t
WR3
IOW#/WR# write active pulse width
FE to RE
FE to RE
16
I/O
160
Standard
t
WR4
IOW#/MEMW#/DOCW#/WR# write
active pulse width FE to RE
active pulse width FE to RE
8
M, I/O
520
Standard
t
WR5
IOW#/MEMW#/DOCW#/WR# write
active pulse width FE to RE
active pulse width FE to RE
8
M, I/O
160
Zero wait state
t
WCU1
MEMW#/WR#/DOCW# inactive pulse
width
width
16
M
103
t
WCU2
MEMW#/WR#/DOCW# inactive pulse
width
width
8
M
163
t
WCU3
IOW#/WR# inactive pulse width
8, 16
I/O
163
t
RDYH
IOR#/MEMR#/RD#/DOCR#/IOW#/
MEMW#/WR#/DOCW# hold after
IOCHRDY RE
MEMW#/WR#/DOCW# hold after
IOCHRDY RE
8, 16
M, I/O
120
t
RDYA1
IOCHRDY valid after IOR#/MEMR#/
RD#/DOCR#/IOW#/MEMW#/WR#/
DOCW# FE
RD#/DOCR#/IOW#/MEMW#/WR#/
DOCW# FE
16
M, I/O
78