參數(shù)資料
型號: AM79C970
廠商: Advanced Micro Devices, Inc.
英文描述: PCnetTM-PCI Single-Chip Ethernet Controller for PCI Local Bus
中文描述: PCnetTM - PCI單芯片以太網(wǎng)控制器的PCI總線
文件頁數(shù): 43/168頁
文件大小: 943K
代理商: AM79C970
AMD
P R E L I M I N A R Y
1-910
Am79C970
Slave I/O Write
The Slave I/O Write command is used by the host CPU
to write to the PCnet-PCI’s CSRs, BCRs and EEPROM
locations. It is a single cycle, non-burst 16-bit or 32-bit
transfer which is initiated by the host CPU. The typical
number of wait states added to a slave I/O write access
on the part of the PCnet-PCI controller is 6 to 7 clock
cycles, depending upon the relative phases of the inter-
nal Buffer Management Unit clock and the CLK signal,
since the internal Buffer Management Unit clock is a di-
vide-by-two version of the CLK signal. The PCnet-PCI
controller will not produce Slave I/O write commands
while being a bus master.
18220C-21
FRAME
CLK
AD
IRDY
TRDY
C/
BE
1
2
3
4
5
6
7
8
ADDR
DATA
0011
BE
's
9
10
11
PAR
PAR
PAR
STOP
DEVSEL
Figure 19.
Slave I/O Write
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參數(shù)描述
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