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| 型号： | 7548 |
| 厂商： | Renesas Technology Corp. |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 单芯片8位CMOS微机 |
| 文件页数： | 23/73页 |
| 文件大小： | 1255K |
| 代理商： | 7548 |
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Rev.2.00
REJ03B0210-0200
Mar 15, 2007
Page 23 of 70
7548 Group
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
Key Input Interrupt (Key-On Wakeup)
A key-on wakeup interrupt request is generated by applying “L”
level to any pin of port P1 that has been set to input mode.
In other words, it is generated when the AND of input level goes
from “1” to “0”. An example of using a key input interrupt is
shown in Figure 22, where an interrupt request is generated by
pressing one of the keys provided as an active-low key matrix
which uses ports P1
0
to P1
3
as input ports.
Fig 22. Connection example when using key input interrupt and port P1 block diagram
Port PXx
level output
“L”
Key input interrupt request
* P-channel transistor for pull-up
** CMOS output buffer
bit 5 =
Port P1
5
latch
Port P1
5
Direction register =
**
*
P1
5
output
bit 4 =
Port P1
4
latch
Port P1
4
Direction register =
**
*
P1
4
output
bit 3 =
Port P1
3
latch
Port P1
3
Direction register =
**
*
P1
3
input
bit 2 =
Port P1
2
latch
Port P1
2
Direction register =
**
*
P1
2
input
bit 1 =
Port P1
1
latch
Port P1
1
Direction register =
**
*
P1
1
input
bit 0 =
Port P1
0
latch
Port P1
0
Direction register =
**
*
P1
0
input
Falling edge
detection
Falling edge
detection
Falling edge
detection
Falling edge
detection
Falling edge
detection
Falling edge
detection
Port P1
0
key-on wakeup
selection bit
“0”
“0”
“1”
“1”
“1”
“1”
“1”
“1”
“0”
“0”
“0”
“0”
Port P1
Input read circuit
Port P1 pull-up control register
Port P1 pull-up control register
Port P1 pull-up control register
Port P1 pull-up control register
Port P1 pull-up control register
Port P1
4
key-on wakeup
selection bit
Port P1
3
key-on wakeup
selection bit
Port P1
2
key-on wakeup
selection bit
Port P1 pull-up control register
Port P1
1
key-on wakeup
selection bit
Port P1
5
key-on wakeup
selection bit
相关PDF资料 |
PDF描述 |
|---|---|
| 7549 | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 75HQ | SCHOTTKY RECTIFIER |
| 75HQ030 | SCHOTTKY RECTIFIER |
| 75HQ035 | SCHOTTKY RECTIFIER |
| 75HQ040 | SCHOTTKY RECTIFIER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 7548_07 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:Standard Characteristics |
| 7548_0710 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 75481-001 | 功能描述:集管和线壳 BACKPANEL PINS RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector |
| 75481-002 | 功能描述:集管和线壳 BERGPIN - WITH LARGE STA-R RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector |
| 75481-004 | 功能描述:集管和线壳 BERGPIN RoHS:否 产品种类:1.0MM Rectangular Connectors 产品类型:Headers - Pin Strip 系列:DF50 触点类型:Pin (Male) 节距:1 mm 位置/触点数量:16 排数:1 安装风格:SMD/SMT 安装角:Right 端接类型:Solder 外壳材料:Liquid Crystal Polymer (LCP) 触点材料:Brass 触点电镀:Gold 制造商:Hirose Connector |
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