參數(shù)資料
型號: 21440
廠商: Intel Corp.
英文描述: Multiport 10/100Mb/s Ethernet Controller(多端口10/100Mb/s 以太網(wǎng)控制器)
中文描述: 多端口10/100Mb/s以太網(wǎng)控制器(多端口支持10/100Mbps以太網(wǎng)控制器)
文件頁數(shù): 16/92頁
文件大小: 1352K
代理商: 21440
Pinout
2-4
21440 Multiport 10/100Mb/s Ethernet Controller
2.2
Pin Count
Table 2-2
summarizes the 21440 pin count.
2.3
Connection Rules
All the reserved pins must remain unconnected.
All the OD (Open Drain) signals must be connected to a pull-up device.
All signals connected to a fixed value should be connected through a resistive device. The
following are recommended resistor values:
Unused I/O pins: 10 K
pull-up
Unused I pins: 1
10 K
pull-up or pull-down
Unused O pins: no pull-up required
OD pins: R=T/C (required signal deassertion time (T) divided by capacitive load (C))
Table 2-2. 21440 Pin Count
Pin
Common
Per Port
Total
CPU
26
1
34
FIFO
87
3
111
MII/SYM
2
16
130
JTAG
4
4
Total I/O
119
20
279
Gnd
28
28
Vdd
24
24
Reserved
21
21
Total
352
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