参数资料
| 型号： | CQ82C55A96 |
| 厂商： | Intersil |
| 文件页数： | 2/29页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER 24B 44MQFP |
| 标准包装： | 500 |
| 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： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-QFP |
| 供应商设备封装： | 44-MQFP（10x10） |
| 包装： | 管件 |
第1页当前第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
10
FN2969.10
November 16, 2006
INTR (Interrupt Request)
A “high” on this output can be used to interrupt the CPU
when an input device is requesting service. INTR is set by
the condition: STB is a “one”, IBF is a “one” and INTE is a
“one”. It is reset by the falling edge of RD. This procedure
allows an input device to request service from the CPU by
simply strobing its data into the port.
INTE A
Controlled by bit set/reset of PC4.
INTE B
Controlled by bit set/reset of PC2.
Output Control Signal Definition
(Figure 8 and 9)
OBF - (Output Buffer Full F/F). The OBF output will go “low”
to indicate that the CPU has written data out to the specified
port. This does not mean valid data is sent out of the port at
this time since OBF can go true before data is available.
Data is guaranteed valid at the rising edge of OBF, (See
Note 1). The OBF F/F will be set by the rising edge of the
WR input and reset by ACK input being low.
ACK - (Acknowledge Input). A “low” on this input informs the
82C55A that the data from Port A or Port B is ready to be
accepted. In essence, a response from the peripheral device
indicating that it is ready to accept data, (See Note 1).
INTR - (Interrupt Request). A “high” on this output can be
used to interrupt the CPU when an output device has
accepted data transmitted by the CPU. INTR is set when
ACK is a “one”, OBF is a “one” and INTE is a “one”. It is reset
by the falling edge of WR.
INTE A
Controlled by Bit Set/Reset of PC6.
INTE B
Controlled by Bit Set/Reset of PC2.
NOTE:
1. To strobe data into the peripheral device, the user must operate
the strobe line in a hand shaking mode. The user needs to send
OBF to the peripheral device, generates an ACK from the
peripheral device and then latch data into the peripheral device
on the rising edge of OBF.
FIGURE 7. MODE 1 (STROBED INPUT)
tST
STB
INTR
RD
INPUT FROM
IBF
PERIPHERAL
tSIB
tSIT
tPH
tPS
tRIT
tRIB
FIGURE 8. MODE 1 OUTPUT
1
D7
0
D6
1
D5
1
D4
1/0
D3 D2 D1 D0
CONTROL WORD
MODE 1 (PORT A)
PC7
8
ACKA
PC6
PA7-PA0
OBFA
INTRA
PC3
PC4, PC5
2
WR
PC4, PC5
1 = INPUT
0 = OUTPUT
1
D7 D6 D5 D4 D3 D2 D1 D0
CONTROL WORD
MODE 1 (PORT B)
PC1
8
ACKB
PC2
INTE
B
PB7-PB0
OBFB
INTRB
PC0
WR
10
INTE
A
82C55A
相关PDF资料 |
PDF描述 |
|---|---|
| CAT9554AWI-GT2 | IC I/O EXPANDER I2C 8B 16SOIC |
| CQ82C55A | IC I/O EXPANDER 24B 44MQFP |
| ATMEGA88PV-10MUR | MCU AVR 8KB FLASH 10MHZ 32QFN |
| PCA9535EMTTXG | 16-BIT I/O EXPANDER |
| JLC1562BFEL | IC BUS INTRFACE I2C I/O 16SOEIAJ |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CQ82C55AZ | 功能描述:外围驱动器与原件 - PCI PERI PRG-I/O 5V 8MHZ COM RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| CQ89-2M | 制造商:CENTRAL 制造商全称:Central Semiconductor Corp 功能描述:SURFACE MOUNT 2 AMP SILICON TRIAC 600 THRU 800 VOLTS |
| CQ89-2M_10 | 制造商:CENTRAL 制造商全称:Central Semiconductor Corp 功能描述:SURFACE MOUNT 2 AMP SILICON TRIAC 600 THRU 800 VOLTS |
| CQ89-2N | 制造商:CENTRAL 制造商全称:Central Semiconductor Corp 功能描述:SURFACE MOUNT 2 AMP SILICON TRIAC 600 THRU 800 VOLTS |
| CQ89B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:TRIAC|200V V(DRM)|1A I(T)RMS|SOT-89 |
发布紧急采购，3分钟左右您将得到回复。