am79c940 Advanced Micro Devices, am79c940 Datasheet - Page 95

• Manufacturer Part Number: am79c940
• Description: Media Access Controller For Ethernet Mace
• Manufacturer: Advanced Micro Devices

AC CHARACTERISTICS (continued)
Note:
1. Not tested but data available upon request.
IEEE 1149.1 Timing
10BASE-T Transmit Timing
10BASE-T Receive Timing
109
110
111
112
113
114
115
125
126
127
128
129
130
131
132
133
134
135
136
140
141
142
143
144
No.
Parameter
Symbol
tTCLK
tsu1
tsu2
thd1
thd2
td1
td2
tTETD
tTR
tTF
tTM
tXMTON
tXMTOFF
tPERLP
tPWLP
tPWPLP
tJA
tJR
tJREC
tPWNRD
tPWROFF
tRETD
tRCVON
tRCVOFF
TCK Period, 50% duty
cycle (+5%)
TMS setup to TCK
TDI setup to TCK
TMS hold time from TCK
TDI hold time from TCK
TCK delay to TDO
TCK delay to SYSTEM OUTPUT
Transmit Start of Idle
Transmitter Rise Time
Transmitter Fall Time
Transmitter Rise and Fall
Time Mismatch
XMT# Asserted Delay
XMT# De-asserted Delay
Idle Signal Period
Idle Link Pulse Width
Predistortion Idle Link Pulse Width
Transmit Jabber Activation Time
Transmit Jabber Reset Time
Transmit Jabber Recovery Time
(Minimum Time Gap Between
Transmitted Packets to Prevent
Jabber Activation)
RXD Pulse Width Not to
Turn Off Internal
Carrier Sense
RXD Pulse Width to Turn Off
VIN > VTHS (min)
Receive Start of Idle
RCV# Asserted Delay
RCV# De-asserted Delay
Parameter Description
Am79C940
(10% to 90%)
(90% to 10%)
(Note 1)
(Note 1)
VIN > VTHS (min)
Test Conditions
tRON–50 tRON+100
TBD
TBD
Min
250
250
136
200
200
1.0
75
45
20
8
Min
100
10
8
5
5
Max
TBD
TBD
350
100
120
150
750
5.5
5.5
24
55
1
–
AMD
Max
30
35
Unit
ms
ms
ms
ms
ns
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
s
95