am79c981 Advanced Micro Devices, am79c981 Datasheet - Page 27

• Manufacturer Part Number: am79c981
• Description: Integrated Multiport Repeater Plus? Imr+? ??9
• Manufacturer: Advanced Micro Devices

SWITCHING CHARACTERISTICS over operating ranges unless otherwise specified
Clock and Reset
Management Port
Expansion Port
Parameter
t
t
Symbol
t
t
t
t
t
TESTHLD
t
t
TESTSET
RSTHLD
t
t
t
X1HCRS
STRHLD
t
t
t
RSTSET
t
t
X1HSTH
STRSET
t
t
X1HSTL
t
t
t
SCLKH
SCLKR
SODLY
X1HRH
X1HDR
SCLKL
SCLKF
X1HRL
X1HDZ
SIHLD
SISET
t
t
PRST
t
SCLK
t
t
t
X1H
X1R
RST
X1L
X1F
X1
Parameter Description
X1 Clock Period
X1 Clock HIGH
X1 Clock LOW
X1 Clock Rise Time
X1 Clock Fall Time
Reset pulse width after power on
(RST pin LOW)
Reset pulse width
(RST pin LOW)
RST HIGH setup time with
respect to X1 Clock
RST LOW hold time with
respect to X1 Clock
SCLK Clock Period
SCLK Clock HIGH
SCLK Clock LOW
SCLK Clock Rise Time
SCLK Clock Fall Time
SI input setup time with respect to SCLK
rising edge
SI input hold time with
respect to SCLK rising edge
SO output delay with
respect to SCLK rising edge
X1 rising edge to CRS valid
X1 rising edge to STR HIGH
X1 rising edge to STR LOW
TEST input setup time with respect to
SCLK rising edge
TEST input hold time with respect to
SCLK rising edge
STR setup time
STR hold time
X1 rising edge to REQ driven LOW
X1 rising edge to REQ driven HIGH
X1 rising edge to DAT/JAM driven
X1 rising edge to DAT/JAM not driven
PRELIMINARY
Am79C981
Test Conditions
C
C
C
C
C
C
C
C
L
L
L
L
L
L
L
L
= 100 pF
= 100 pF
= 100 pF
= 100 pF
= 100 pF
= 100 pF
= 100 pF
= 100 pF
49.995
Min
150
100
20
20
20
30
30
10
10
10
10
12
14
14
14
14
–
–
4
0
–
–
–
5
–
–
5
50.005
Max
30
30
10
10
10
10
40
40
40
40
40
40
40
40
–
–
–
–
–
–
–
–
–
–
–
–
–
AMD
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
1–97
s
s