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参数资料
| 型号： | CS82C59A-12Z96 |
| 厂商： | Intersil |
| 文件页数： | 6/22页 |
| 文件大小： | 0K |
| 描述： | IC CTRL INTERRUPT 12.5MHZ 28PLCC |
| 标准包装： | 750 |
| 控制器类型： | CMOS 优先中断控制器 |
| 接口： | 系统总线 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 电流 - 电源： | 1mA |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-LCC（J 形引线） |
| 供应商设备封装： | 28-PLCC（11.51x11.51） |
| 包装： | 带卷 (TR) |
14
FN2784.5
March 17, 2006
The difficulty here is that if an Interrupt Request is
acknowledged and an End of Interrupt command did not
reset its IS bit (i.e., while executing a service routine), the
82C59A would have inhibited all lower priority requests with
no easy way for the routine to enable them.
That is where the Special Mask Mode comes in. In the
Special Mask Mode, when a mask bit is set in OCW1, it
inhibits further interrupts at that level and enables interrupts
from all other levels (lower as well as higher) that are not
masked.
Thus, any interrupts may be selectively enabled by loading
the mask register.
The Special Mask Mode is set by OCW3 where: ESMM = 1,
SMM = 1, and cleared where ESMM = 1, SMM = 0.
Poll Command
In this mode, the INT output is not used or the
microprocessor internal Interrupt Enable flip flop is reset,
disabling its interrupt input. Service to devices is achieved by
software using a Poll command.
The Poll command is issued by setting P = 1 in OCW3. The
82C59A treats the next RD pulse to the 82C59A (i.e., RD =
0, CS = 0) as an interrupt acknowledge, sets the appropriate
IS bit if there is a request, and reads the priority level.
Interrupt is frozen from WR to RD.
The word enabled onto the data bus during RD is:
W0 - W2: Binary code of the highest priority level request-
ing service.
I:
Equal to a “1” if there is an interrupt.
This mode is useful if there is a routine command common to
several levels so that the INTA sequence is not needed
(saves ROM space). Another application is to use the poll
mode to expand the number of priority levels to more than 64.
D7
D6
D5
D4
D3
D2
D1
D0
I
----
W2
W1
W0
EDGE
SENSE
LATCH
LTIM BIT
0 = EDGE
1 = LEVEL
VCC
IR
8080/85
MODE
80C86/
88/286
MODE
INTA
FREEZE
INTA
FREEZE
READ
IRR
WRITE
MASK
READ IMR
READ ISR
MASTER CLEAR
MASK LATCH
REQUEST
LATCH
IN - SERVICE
LATCH
NON-
MASKED
REQ
CLR
Q
SET
TO OTHER PRIORITY CELLS
PRIORITY
RESOLVER
CONTROL
LOGIC
SET ISR
CLR ISR
ISR BIT
Q
D
C
CLR
Q
D
CQ
CLR
SET
Q
NOTES:
1. Master clear active only during ICW1.
2. FREEZE is active during INTA and poll sequence only.
3. Truth Table for D-latch.
C
D
Q
Operation
1D1
D1
Follow
0X
Qn-1
Hold
82C59A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CS82C59A-5 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CS82C59A-5S2064 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CS82C59A96 | 功能描述:IC CTRL INTERRUPT 12.5MHZ 28PLCC RoHS:否 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:4,900 系列:- 控制器类型:USB 2.0 控制器 接口:串行 电源电压:3 V ~ 3.6 V 电流 - 电源:135mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:36-VFQFN 裸露焊盘 供应商设备封装:36-QFN（6x6） 包装:* 其它名称:Q6396337A |
| CS82C59A96S2075 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CS82C59AR2490 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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