參數(shù)資料
型號(hào)： MSM82C55A-2VJS
廠商： LAPIS SEMICONDUCTOR CO LTD
元件分類(lèi)： 微控制器/微處理器
英文描述： 24 I/O, PIA-GENERAL PURPOSE, PQCC44
封裝： 0.650 INCH, 1.27 MM PITCH, PLASTIC, QFJ-44
文件頁(yè)數(shù)： 13/27頁(yè)
文件大?。?/td> 207K
代理商： MSM82C55A-2VJS
19/26
Semiconductor
MSM82C55A-2RS/GS/VJS
4. When Group A is Different in Mode from Group B
Group A and group B can be used by setting them in different modes each other at the same
time. When either group is set to mode 1 or mode 2, it is possible to set the one not defined
as a control pin in port C to both input and output as port which operates in mode 0 at the
3rd and 0th bits of the control word.
(Mode combinations that define no control bit at port C)
When the I/O bit is set to input in this case, it is possible to access data by the normal port
C read operation.
When set to output, PC7-PC4 bits can be accessed by the bit set/reset function only.
Meanwhile, 3 bits from PC2 to PC0 can be accessed by normal write operation.
The bit set/reset function can be used for all of PC3-PC0 bits. Note that the status of port C
varies according to the combination of modes like this.
Group A
Group B
Port C
PC7
PC6
PC5
PC4
PC3
PC2
PC1
1
2
3
4
5
6
7
8
9
Mode 1
input
Mode 0
Output
Mode 0
Mode 1
Input
Mode 1
Input
Mode 1
Output
Mode 1
Output
Mode 2
Mode 0
Mode 1
Input
Mode 1
Output
Mode 1
Input
Mode 1
Output
Mode 1
Input
Mode 1
Output
Mode 0
I/O
IBFA
STBA
INTRA
I/O
PC0
I/O
OBFA
ACKA
I/O
INTRA
I/O
STBB
IBFB
INTRB
I/O
ACKB
OBFB
INTRB
I/O
IBFA
STBA
INTRA
STBB
IBFB
INTRB
I/O
IBFA
STBA
INTRA
ACKB
OBFB
INTRB
OBFA
ACKA
I/O
INTRA
STBB
IBFB
INTRB
OBFA
ACKA
I/O
INTRA
ACKB
OBFB
INTRB
OBFA
ACKA
IBFA
STBA
INTRA
I/O
Controlled at the 3rd bit (D3) of
the Control Word
Controlled at the 0th bit (D0) of
the Control Word
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