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参数资料
| 型号： | MSM82C54-2RS |
| 厂商： | OKI SEMICONDUCTOR CO., LTD. |
| 元件分类： | 定时器 |
| 英文描述： | CMOS PROGRAMMABLE INTERVAL TIMER |
| 中文描述： | CMOS可编程间隔计时器 |
| 文件页数： | 22/23页 |
| 文件大小： | 161K |
| 代理商： | MSM82C54-2RS |
8/23
Semiconductor
MSM82C54-2RS/GS/JS
DESCRIPTION OF BASIC OPERATIONS
Data transfers between the internal registers and external data bus is outlined in the following
table.
DESCRIPTION OF OPERATION
MSM82C54-2 functions are selected by control words from the CPU. In the required program
sequence, the control word setting is followed by the count value setting and execution of the
desired timer operation.
Control Word and Count Value Program
Each counter operating mode is set by control word programming. The control word format
is outlined below.
SC1
D7
SC0
D6
RL1
D5
RL0
D4
M2
D3
M1
D2
M0
D1
BCD
D0
Select Counter
Read/Load
Mode
BCD
(CS=0, A0, A1=1, 1, RD=1, WR=0)
0
CS
Function
0
1
0
1
0
1
RD
0
1
0
1
0
WR
1
1
0
1
0
A1
0
1
1
0
1
0
A0
1
0
1
Data Bus to Counter #0 Writing
Data Bus to Counter #1 Writing
Data Bus to Counter #2 Writing
Data Bus to Control Word Register Writing
Data Bus from Counter #0 Writing
Data Bus from Counter #1 Writing
Data Bus from Counter #2 Writing
Data Bus in High Impedance Status
: denotes "not specified"
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