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參數資料
型號: W83877TF
廠商: WINBOND ELECTRONICS CORP
元件分類: 外設及接口
英文描述: Multi-Function I/O Port Controller(用于個人計算機的多功能輸入/輸出口控制器)
中文描述: MULTIFUNCTION PERIPHERAL, PQFP100
封裝: QFP-100
文件頁數: 15/154頁
文件大小: 821K
代理商: W83877TF
W83877TF
Publication Release Date: March 1998
- 5 -
Version 0.61
1.0 PIN DESCRIPTION
(Note: Refer to section 9.2 DC CHARACTERISTICS for details.)
I/O8tc - TTL level output pin with 8 mA source-sink capability; CMOS level input voltage
I/O12t - TTL level bi-directional pin with 12 mA source-sink capability
I/O24t - TTL level bi-directional pin with 24 mA source-sink capability
OUT8t - TTL level output pin with 8 mA source-sink capability
OUT12t - TTL level output pin with 12 mA source-sink capability
OD12 - Open-drain output pin with 12 mA sink capability
OD24 - Open-drain output pin with 24 mA sink capability
INt
- TTL level input pin
INts - TTL level Schmitt-triggered input pin
INc
- CMOS level input pin
INcs - CMOS level Schmitt-triggered input pin
1.1 Host Interface
SYMBOL
PIN
I/O
FUNCTION
D0
D7
A0
A9
66-73
I/O
24t
IN
t
System data bus bits 0-7.
51-55
57-61
System address bus bits 0-9.
A10
75
IN
t
OD
24
In ECP Mode, this pin is the A10 address input.
IOCHRDY
5
In EPP Mode, this pin is the IO Channel Ready output to extend
the host read/write cycle.
MR
6
IN
ts
IN
t
Master Reset. Active high. MR is low during normal operations.
CS
AEN
2
Active low chip select signal.
62
IN
t
IN
ts
System address bus enable.
IOR
63
CPU I/O read signal.
IOW
DRQ_B
64
IN
ts
CPU I/O write signal.
100
OUT
12t
IN
ts
DMA request signal B.
DACK_B
98
DMA Acknowledge signal B.
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