参数资料
| 型号： | ID82C55A |
| 厂商： | Intersil |
| 文件页数： | 25/29页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER 24B 40DIP |
| 标准包装： | 99 |
| 接口： | 可编程 |
| 输入/输出数： | 24 |
| 中断输出： | 无 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 40-CDIP（0.600"，15.24mm） |
| 供应商设备封装： | 40-Cerdip |
| 包装： | 管件 |
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5
FN2969.10
November 16, 2006
two 4-bit ports under the mode control. Each 4-bit port
contains a 4-bit latch and it can be used for the control signal
output and status signal inputs in conjunction with ports A
and B. See Figure 2B.
Operational Description
Mode Selection
There are three basic modes of operation than can be
selected by the system software:
Mode 0 - Basic Input/Output
Mode 1 - Strobed Input/Output
Mode 2 - Bidirectional Bus
When the reset input goes “high”, all ports will be set to the
input mode with all 24 port lines held at a logic “one” level by
internal bus hold devices. After the reset is removed, the
82C55A can remain in the input mode with no additional
initialization required. This eliminates the need to pull-up or
pull-down resistors in all-CMOS designs. The control word
register will contain 9Bh. During the execution of the system
program, any of the other modes may be selected using a
single output instruction. This allows a single 82C55A to
service a variety of peripheral devices with a simple software
maintenance routine. Any port programmed as an output
port is initialized to all zeros when the control word is written.
FIGURE 2A. PORT A BUS-HOLD CONFIGURATION
FIGURE 2B. PORT B AND C BUS-HOLD CONFIGURATION
FIGURE 2. BUS-HOLD CONFIGURATION
MASTER
RESET
OR MODE
CHANGE
INTERNAL
DATA IN
INTERNAL
DATA OUT
(LATCHED)
EXTERNAL
PORT A PIN
OUTPUT MODE
INPUT MODE
RESET
OR MODE
CHANGE
INTERNAL
DATA IN
INTERNAL
DATA OUT
(LATCHED)
EXTERNAL
PORT B, C
OUTPUT MODE
PIN
P
VCC
FIGURE 3. BASIC MODE DEFINITIONS AND BUS INTERFACE
DATA BUS
8I/O
B
PB7-PB0
4I/O
PC3-PC0
4I/O
C
PC7-PC4
8I/O
A
PA7-PA0
CONTROL BUS
ADDRESS BUS
RD, WR
82C55A
D7-D0
A0-A1
CS
MODE 0
8I/O
B
PB7-PB0
CONTROL
C
8I/O
A
PA7-PA0
MODE 1
OR I/O
CONTROL
OR I/O
8I/O
B
PB7-PB0
C
BI-
A
PA7-PA0
MODE 2
CONTROL
DIRECTIONAL
FIGURE 4. MODE DEFINITION FORMAT
D7 D6 D5
D4 D3 D2 D1 D0
PORT C (LOWER)
1 = INPUT
0 = OUTPUT
PORT B
1 = INPUT
0 = OUTPUT
MODE SELECTION
0 = MODE 0
1 = MODE 1
GROUP B
PORT C (UPPER)
1 = INPUT
0 = OUTPUT
PORT A
1 = INPUT
0 = OUTPUT
MODE SELECTION
00 = MODE 0
01 = MODE 1
GROUP A
1X = MODE 2
MODE SET FLAG
1 = ACTIVE
CONTROL WORD
82C55A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ID82C55A/+ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Peripheral Interface |
| ID82C55A-5 | 制造商:HARRIS 制造商全称:HARRIS 功能描述:CMOS Programmable Peripheral Interface |
| ID82C59A | 功能描述:IC CONTROLLER INTERRUPT 28-DIP 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 |
| ID82C59A | 制造商:Intersil Corporation 功能描述:Controller IC Package/Case:28-CDIP |
| ID82C59A/+ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Interrupt Controller |
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