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| 型号： | 7549 |
| 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： | 1272K |
| 代理商： | 7549 |
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Rev.2.00
REJ03B0202-0200
Mar 05, 2007
Page 23 of 70
7549 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 18, 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 21. Connection example when using key input interrupt and port P1 block diagram
Port PXx
level output
“L”
Port P1 pull-up control register
bit 7 =
“0”
Port P1
7
latch
Port P1
7
Direction register =
**
*
P1
7
output
Key input interrupt request
* P-channel transistor for pull-up
** CMOS output buffer
Port P1 pull-up control register
bit 6 =
**
Port P1
6
latch
Port P1
6
Direction register =
*
P1
6
output
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
Falling edge
detection
Falling edge
detection
Port P1
0
key-on wakeup
selection bit
Port P1
6
key-on wakeup
selection bit
“0”
“0”
“0”
“1”
“1”
“1”
“1”
“1”
“1”
“1”
“1”
“0”
“0”
“0”
“0”
Port P1
Input read circuit
Port P1
7
key-on wakeup
selection bit
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
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 7549_0710 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 7549_09 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 7-5-4905 | 功能描述:3M 4905 VHB TAPE SPECIALTY TAPES 制造商:3m (tc) 系列:VHB?? 4905 零件状态:在售 厚度 - 粘合剂:- 厚度 - 底布，载体:- 标准包装:1 |
| 754905-1 | 功能描述:PIN ATT/ROLL AUTO IV 制造商:te connectivity amp connectors 系列:* 零件状态:有效 标准包装:1 |
| 7-5-4910 | 功能描述:3M 4910 VHB TAPE SPECIALTY TAPES 制造商:3m (tc) 系列:VHB?? 4910 零件状态:在售 底布，载体:丙烯酸泡棉 厚度 - 粘合剂:- 厚度 - 底布，载体:- 标准包装:1 |
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