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參數(shù)資料
| 型號(hào)： | M34551E8FP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP48 |
| 封裝： | 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48 |
| 文件頁(yè)數(shù)： | 23/155頁(yè) |
| 文件大?。?/td> | 1329K |
| 代理商： | M34551E8FP |
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APPLICATION
2-41
4551 Group User’s Manual
2.6 Power down function
2.6.1 Clock control function
The 4551 Group can reduce the power dissipation by controlling oscillation with the clock control register MR.
Refer to section “3.1 Electrical characteristics” for the oscillation frequency and power dissipation.
In Figure 2.6.1, directions in which state transition can be executed are expressed by the arrow. For
example, execute the transition A
→ B → ((XCIN) oscillation stabilizing wait) → G → H to execute the
transition from the state A (MR3MR2MR1MR0 = 1000) after reset to the state H (MR3MR2MR1MR0 = 0111).
Note: Do not stop the oscillation circuit selected by clock selection bit (MR0).
Note the stop of the oscillation circuit selected with the clock selection bit (MR0) if the following
setting is performed.
Example 1: (MR3MR2MR1MR0) = (!0!1) (f(XCIN) selected, f(XCIN) oscillation stop)
Example 2: (MR3MR2MR1MR0) = (!!10) (f(XIN) selected, f(XIN) oscillation stop)
!: “0” or “1.”
2.6.2 Power down function
When the POF instruction or POF2 instruction is executed just after the EPOF instruction, system enters
the power down state. Table 2.6.1 shows the internal state at each mode. Also, Table 2.6.2 shows the
return source from this state.
(1)
Clock operating mode
In this mode, current dissipation can be reduced by stopping XIN-XOUT oscillation and system clock
with the states of RAM, reset circuit, XCIN–XCOUT oscillation, LCD display and timer 2 retained.
(2)
RAM back-up mode
As oscillation stops with RAM, the state of reset circuit retained, current dissipation can be reduced
without losing the contents of RAM.
相關(guān)PDF資料 |
PDF描述 |
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| M34551M4-XXXFP | 4-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP48 |
| M34552G8FP | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP48 |
| M34552M8H-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48 |
| M34552G8HFP | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP48 |
| M34556G8HFP | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO42 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M34551E8-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTER |
| M34551M4 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:4-BIT SINGLE-CHIP MICROCOMPUTER |
| M34551M4-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTER |
| M34551M8 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:4-BIT SINGLE-CHIP MICROCOMPUTER |
| M34552G8FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
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