AM79C90 Advanced Micro Devices, AM79C90 Datasheet - Page 38

• Manufacturer Part Number: AM79C90
• Description: CMOS Local Area Network Controller for Ethernet (C-LANCE)
• Manufacturer: Advanced Micro Devices

SWITCHING CHARACTERISTICS
38
No.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
2
3
4
5
6
7
8
9
AMD
Parameter
Symbol
t
t
t
CYCLE
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
RDAS
t
t
t
t
t
t
t
t
DOFF
t
t
RCH
RCR
RDR
RDH
RDS
CPH
DON
HHA
t
TCT
TCL
TCH
TCR
TCF
TEP
TEH
TDP
TDH
RCT
RCL
RCF
RDF
DPL
XAS
XAH
t
RW
AH
AS
Parameter Description
TCLK Period
TCLK LOW Time
TCLK HIGH Time
Rise Time of TCLK
Fall Time of TCLK
TENA Propagation Delay After the
Rising Edge of TCLK
TENA Hold Time After the Rising
Edge of TCLK
TX Data Propagation Delay After the
Rising Edge of TCLK
TX Data Hold Time After the Rising
Edge of TCLK
RCLK Period
RCLK HIGH Time
RCLK LOW Time
Rise Time of RCLK
Fall Time of RCLK
RX Data Rise Time
RX Data Fall Time
RX Data Hold Time (RCLK to RX
Data Change)
RX Data Setup Time (RX Data Stable
to the Rising Edge of RCLK)
RENA LOW Time
CLSN HIGH Time
Bus Master Driver Disable After Rising
Edge of HOLD
Bus Master Driver Enable After Falling
Edge of HLDA
Delay to Falling Edge of HLDA from
Falling Edge of HOLD (Bus Master)
RESET Pulse Width LOW
Read/Write, Address/Data Cycle Time
Address Setup Time to the Falling
Edge of ALE
Address Hold Time After the Rising
Edge of DAS
Address Setup Time to the Falling
Edge of ALE
Address Hold Time After the Falling
Edge of ALE
Data Setup Time to the Rising Edge
of DAS (Bus Master Read)
P R E L I M I N A R Y
Am79C90
Conditions
(Note 3)
(Note 3)
(Note 3)
(Note 2)
(Note 2)
(Note 3)
(Note 3)
(Note 3)
(Note 3)
(Note 2)
(Note 2)
(Note 7)
(Note 1)
Test
1t
TCT
2t
6t
Min
99
45
45
85
38
38
35
80
50
75
35
75
35
40
5
5
5
0
TCT
TCT
+ 20
Typ
2t
TCT
Max
101
118
55
55
60
60
50
8
8
8
8
8
8
+ 50
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
ns
ns
ns
ns