參數(shù)資料
型號: AT7601FG
廠商: AME, Inc.
英文描述: Printer Port Controller
中文描述: 打印機端口控制器
文件頁數(shù): 2/35頁
文件大小: 195K
代理商: AT7601FG
AME, Inc.
2
Printer Port Cotroller
AT7601F
Rev. B.02
4. Pin Description
I - TTL level input
O12 - Out buffer with 12mA drive/sink current
OD12
- Open-drain with 12mA sink current
ICLK - Clock Input
OCLK - Clock Output
Pin No.
Pin name
I/O Type
Function
2
AEN
I
DMA Address Enable: active high, DMA controller has control of the
address bus.
3
IOCHRDY
OD12
I/O channel Ready: active High
4 - 11
DB [0: 7]
I/O12
Data Bus: bi-direction data port
13
DACK#
I
DMA Acknowledge: Active low
14
DRQ
O12
DMA Request: Active high
15
TC
I
Terminal count:
16
XTAL1/CLKIN
ICLK
Crystal oscillator input,
17
XTAL2
OCLK
Crystal oscillator output,
18
RESET
I
System Reset: active high
25, 35
NC
40
PS/PDIR
I
O12
Power on strapping
Printer Port Direction Indicator
41
PINT
OD12/O12
Print Interrupt
42-44
A [0: 2]
I
Address select line 0 - 2
45
CS2# /A10
I
A10: Address select line 10
Chip Select 2: active low, enables the parallel port / CPU data
transfer operation
46
CS1#
I
Chip Select 1: active low, enables the parallel port / CPU data
transfer operation
48
IOW#
I
I/O write: active low
1
IOR#
I
I/O read: active low
Table 1. Host Interface
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