AM79C971VCW Advanced Micro Devices, AM79C971VCW Datasheet - Page 208

• Manufacturer Part Number: AM79C971VCW
• Description: PCnet-FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus
• Manufacturer: Advanced Micro Devices

SWITCHING CHARACTERISTICS: MEDIA INDEPENDENT INTERFACE
Notes:
1. MDIO valid measured at the exposed mechanical Media Independent Interface.
2. TXCLK and RXCLK frequency and timing parameters are defined for the external physical layer transceiver as defined in the
208
Parameter
Symbol
Transmit Timing
t
Receive Timing
t
t
Management Cycle Timing
t
t
t
t
t
t
TVAL
RSU
RH
MHIGH
MLOW
MCYC
MSU
MH
MVAL
IEEE 802.3u standard. They are not replicated here.
Parameter Name
TX_EN, TX_ER, TXD valid from
RX_DV, RX_ER, RXD setup to
RX_DV, RX_ER, RXD hold to
MDC Pulse Width HIGH Time
MDC Pulse Width LOW Time
MDC Cycle Period
MDIO setup to
MDIO hold to
MDIO valid from
TX_CLK
RX_CLK
RX_CLK
MDC
MDC
MDC
Test Condition
measured from V
measured from V
(Note 1)
measured from V
measured from V
(Note 1)
measured from V
measured from V
(Note 1)
C
C
C
C
measured from V
measured from V
(Note 1)
C
measured from V
measured from V
(Note 1)
C
measured from V
measured from V
(Note 1)
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
Am79C971
= 390 pf
= 390 pf
= 390 pf
= 470 pf,
= 470 pf,
= 470 pf,
ilmax
ihmin
ilmax
ihmin
ilmax
ihmin
ilmax
ihmin
ilmax
ihmin
ilmax
ihmin
= 0.8 V or
= 0.8 V or
= 0.8 V or
= 0.8 V or
= 2.0V
= 2.0V
= 0.8 V or
= 2.0V
= 0.8 V or
= 2.0V
= 2.0V
= 2.0V,
Min
0
10
10
160
160
400
10
10
Max
25
t
t
MCYC
MSU
-
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns