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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： | 40/73页 |
| 文件大小： | 1272K |
| 代理商： | 7549 |
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Rev.2.00
REJ03B0202-0200
Mar 05, 2007
Page 40 of 70
7549 Group
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
Notes on Watchdog Timer
(1) The watchdog timer operates in wait mode. To prevent
underflow, write to the watchdog timer control register.
The watchdog timer stops in stop mode, but starts counting
at the same time as exiting stop mode. After exiting stop
mode, it continues counting during oscillation stabilization
time. To prevent underflow during the period, the watchdog
timer H count source selection bit (bit 7) in the watchdog
timer control register (address 0039
16
) should be set to “0”
before executing the STP instruction.
Note that the watchdog timer continues counting even if the
STP instruction is executed in the following two conditions:
1
Stopping the low-speed on-chip oscillator: Disabled (bit
4 in FSROM2)
Source clock of the watchdog timer: Low-speed on-chip
oscillator/16 (bit 0 in FSROM2)
2
Stopping the low-speed on-chip oscillator: Disabled (bit
4 in FSROM2)
Source clock of the watchdog timer:
φ
SOURCE (bit 0 in
FSROM2)
φ
SOURCE: Low-speed on-chip oscillator (bits 5 and 4 in
CLKM)
(2) STP instruction function selection bit
The function of the STP instruction can be selected by the bit
2 in FSROM2. This bit cannot be used for rewriting by
executing the STP instruction.
When this bit is set to “0”, stop mode is entered by
executing the STP instruction.
When this bit is set to “1”, internal reset occurs by
executing the STP instruction.
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PDF描述 |
|---|---|
| 75HQ | SCHOTTKY RECTIFIER |
| 75HQ030 | SCHOTTKY RECTIFIER |
| 75HQ035 | SCHOTTKY RECTIFIER |
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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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