參數(shù)資料
型號： IQ82C55AZ96
廠商： Intersil
文件頁數(shù)： 29/29頁
文件大?。?/td> 0K
描述： IC I/O EXPANDER 24B 44MQFP
標(biāo)準(zhǔn)包裝： 500
接口： 可編程
輸入/輸出數(shù)： 24
中斷輸出： 無
電源電壓： 4.5 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 44-QFP
供應(yīng)商設(shè)備封裝： 44-MQFP（10x10）
包裝： 管件
9
FN2969.10
November 16, 2006
Operating Modes
Mode 1 - (Strobed Input/Output). This functional
configuration provides a means for transferring I/O data to or
from a specified port in conjunction with strobes or “hand
shaking” signals. In mode 1, port A and port B use the lines
on port C to generate or accept these “hand shaking”
signals.
Mode 1 Basic Function Definitions:
Two Groups (Group A and Group B)
Each group contains one 8-bit port and one 4-bit
control/data port
The 8-bit data port can be either input or output. Both
inputs and outputs are latched.
The 4-bit port is used for control and status of the 8-bit port.
Input Control Signal Definition
(Figures 6 and 7)
STB (Strobe Input)
A “l(fā)ow” on this input loads data into the input latch.
IBF (Input Buffer Full F/F)
A “high” on this output indicates that the data has been
loaded into the input latch: in essence, an acknowledgment.
IBF is set by STB input being low and is reset by the rising
edge of the RD input.
CONTROL WORD #12
CONTROL WORD #14
CONTROL WORD #13
CONTROL WORD #15
Mode 0 Configurations (Continued)
1
D7
0
D6
0
D5
1
D4
1
D3
0
D2
0
D1
0
D0
8
PA7 - PA0
4
PC7 - PC4
4
PC3 - PC0
8
PB7 - PB0
D7 - D0
82C55A
A
B
C
1
D7
0
D6
0
D5
1
D4
1
D3
0
D2
1
D1
0
D0
8
PA7 - PA0
4
PC7 - PC4
4
PC3 - PC0
8
PB7 - PB0
D7 - D0
82C55A
A
B
C
1
D7
0
D6
0
D5
1
D4
1
D3
0
D2
0
D1
1
D0
8
PA7 - PA0
4
PC7 - PC4
4
PC3 - PC0
8
PB7 - PB0
D7 - D0
82C55A
A
B
C
1
D7
0
D6
0
D5
1
D4
1
D3
0
D2
1
D1
1
D0
8
PA7 - PA0
4
PC7 - PC4
4
PC3 - PC0
8
PB7 - PB0
D7 - D0
82C55A
A
B
C
FIGURE 6. MODE 1 INPUT
1
D7
0
D6
1
D5
1
D4
1/0
D3 D2 D1 D0
CONTROL WORD
MODE 1 (PORT A)
PC4
8
IBFA
PC5
INTE
A
PA7-PA0
STBA
INTRA
PC3
PC6, PC7
I/O
2
RD
PC6, PC7
1 = INPUT
0 = OUTPUT
1
D7 D6 D5 D4 D3 D2 D1 D0
CONTROL WORD
MODE 1 (PORT B)
PC2
8
IBFB
PC1
INTE
B
PB7-PB0
STBB
INTRB
PC0
RD
11
82C55A
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