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| 型号： | MSM82C59A-2 |
| 厂商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | Programmable Universal Timers(可编程中断控制器,单片8中断控制,可级联成64中断控制) |
| 中文描述： | 可编程通用定时器（可编程中断控制器，单片8中断控制，可级联成64中断控制） |
| 文件页数： | 15/28页 |
| 文件大小： | 187K |
| 代理商： | MSM82C59A-2 |
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Semiconductor
MSM82C59A-2RS/GS/JS
(ii) Initialization Command Word 3 (ICW3)
This command word is written when there is more than one MSM82C59A-2 used in
cascade connections in the system, and is loaded into an 8-bit slave register. The
functions of this slave register are listed below.
a. In a master mode system (BUF = 1 and M/ S = 1 in ICW4 or
SP
/
EN
= 1). “1” is set
in each bit where a slave has been connected.
In 85 mode, the master MSM82C59A-2 releases byte 1 of the CALL sequence to
enable the corresponding slave to release byte 2 or 3 (only byte 2 in 86 mode) through
the cascade line.
b. In slave mode (BUF = 1 and M/S = 0 in ICW4 or
SP
/
EN
= 0). Bits 0 thru 2 identify
the slave. The slave compares these bits with the cascade input, and releases bytes
2 and 3 of the CALL sequence (only byte 2 in 86 mode) if a matching result is obtained.
(iii) Initialization Command Word 4 (ICW4)
SFNM: Special Fully Nested Mode is programmed when SFNM = 1.
BUF:
Buffered mode is programmed when BUF = 1. In Buffered mode,
SP
/
EN
is an
output, and Master/slave is selected by the M/S bit.
M/S:
If buffered mode is selected, the MSM82C59A-2 is programmed as the master
when M/S = 1, and as a slave when M/S = 0. M/S is ignored, however, when
BUF = 0.
AEOI:
Automatic End Of Interrupt mode is programmed by AEOI = 1.
m
PM:
(Microprocessor mode)
The MSM82C59A-2 is set to 85 system operation when
m
PM = 0, and to 86
system operation when
m
PM = 1.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MSM82C59A-2GS | 制造商:OKI 制造商全称:OKI electronic componets 功能描述:PROGRAMMABLE INTERRUPT CONTROLLER |
| MSM82C59A-2GS-K | 制造商:ROHM Semiconductor 功能描述: |
| MSM82C59A-2JS | 制造商:ROHM Semiconductor 功能描述: |
| MSM82C59A-2JSDR1 | 制造商:ROHM Semiconductor 功能描述: |
| MSM82C59A-2JS-DR1 | 制造商:ROHM Semiconductor 功能描述:PROGRAMMABLE INTERRUPT CONTROLLER |
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