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7 sub-isa interface, Table 9-24, Sub-isa timing parameters – AMD Geode SC1201 User Manual

Page 394

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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.

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

16

M

225

9-20

Standard

t

RD2

MEMR#/DOCR#/RD#/TRDE# read
active pulse width FE to RE

16

M

105

9-20

Zero wait state

t

RD3

IOR#/RD#/TRDE# read active pulse
width FE to RE

16

I/O

160

9-20

Standard

t

RD4

IOR#/MEMR#/DOCR#/RD#/TRDE#
read active pulse width FE to RE

8

M, I/O

520

9-20

Standard

t

RD5

IOR#/MEMR#/DOCR#/RD#/TRDE#
read active pulse width FE to RE

8

M, I/O

160

9-20

Zero wait state

t

RCU1

MEMR#/DOCR#/RD#/TRDE#
inactive pulse width

16

M

103

9-20

t

RCU2

MEMR#/DOCR#/RD#/TRDE#
inactive pulse width

8

M

163

9-20

t

RCU3

IOR#/RD#/TRDE# inactive pulse
width

8, 16

I/O

163

9-20

t

WR1

MEMW#/WR# write active pulse
width FE to RE

16

M

225

9-21

Standard

t

WR2

MEMW#/DOCW#/WR# write active
pulse width FE to RE

16

M

105

9-21

Zero wait state

t

WR3

IOW#/WR# write active pulse width
FE to RE

16

I/O

160

9-21

Standard

t

WR4

IOW#/MEMW#/DOCW#/WR# write
active pulse width FE to RE

8

M, I/O

520

9-21

Standard

t

WR5

IOW#/MEMW#/DOCW#/WR# write
active pulse width FE to RE

8

M, I/O

160

9-21

Zero wait state

t

WCU1

MEMW#/WR#/DOCW# inactive pulse
width

16

M

103

9-21

t

WCU2

MEMW#/WR#/DOCW# inactive pulse
width

8

M

163

9-21

t

WCU3

IOW#/WR# inactive pulse width

8, 16

I/O

163

9-21

t

RDYH

IOR#/MEMR#/RD#/DOCR#/IOW#/
MEMW#/WR#/DOCW# hold after
IOCHRDY RE

8, 16

M, I/O

120

9-20
9-21

t

RDYA1

IOCHRDY valid after IOR#/MEMR#/
RD#/DOCR#/IOW#/MEMW#/WR#/
DOCW# FE

16

M, I/O

78

9-20
9-21

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