AM79C971 Datasheet, PDF (205/265 Pages) Advanced Micro Devices – PCnet™-FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus

SWITCHING CHARACTERISTICS: BUS INTERFACE (CONCLUDED)
Parameter Parameter Name
Test Condition
Min
Symbol
Expansion Bus Interface Timing
F_CLK
EBCLK Frequency
2.5
t_CYC
EBCLK Period
@ 1.5 V
30
t_HIGH
EBCLK High Time
@ 2.0 V
12
t_LOW
EBCLK Low Time
@ 0.8 V
12
t_FALL
EBCLK Fall Time
over 2 V p-p
1
t_RISE
EBCLK Rise Time
over 2 V p-p
1
t_{v_A_D}
Address and Data valid time from the
rising edge of EBCLK
t_{CS_L}
ERAMCS assert time from the rising
edge of EBCLK
t_{CS_H}
ERAMCS deassert time from rising
edge of EBCLK
7
t_{s_D}
Data setup time to the rising edge of
EBCLK
0
t_{h_D}
Data hold time from the rising edge of
EBCLK
6
t_{_AS_H}
AS_EBOE (Address Strobe) rising
edge from the falling edge of EBCLK
10
t_{_AS_L}
AS_EBOE falling edge from the
rising edge of EBCLK
10
AS_EBOE (Output enable deassert)
t_{_OE_H}
rising edge from the rising edge of
7
EBCLK
t_{_LZ}
Data Bus driving from the rising edge
of EBCLK
5
t_{_HZ}
Data Bus tristated from the rising
edge of EBCLK
t_{_WE_L}
EBWE assert time from the falling
edge of EBCLK
t_{_WE_H}
EBWE deassert time from the rising
edge of EBCLK
t_{_WE_CSAD}
EBWE setup time to Address,
ERAMCS, and Data
1
Note:
Address is the EBUA_EBA[7:0] bus. Data is the EBDA[15:8] and the EBD[7:0] buses.
Max
Unit
33
MHz
400
ns
ns
ns
4
V/ns
4
V/ns
13
ns
13
ns
10
ns
ns
ns
13
ns
13
ns
ns
ns
13
ns
6
ns
10
ns
ns
Am79C971
205