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参数资料
| 型号： | M34519M8-XXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO42 |
| 封装： | 0.450 INCH, 0.80 MM PITCH, PLASTIC, SSOP-42 |
| 文件页数： | 108/138页 |
| 文件大小： | 1146K |
| 代理商： | M34519M8-XXXFP |
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4519 Group
Rev.3.01
2005.06.15
page 69 of 160
REJ03B0007-0301
Fig. 57 Switch to ceramic resonance/RC oscillation/quartz-crystal oscillation
Reset
On-chip oscillator operation
CMCK instruction
CRCKinstruction
Main clock: ceramic resonance
On-chip oscillator: operating
System clock: on-chip oscillator clock
CYCK instruction
Set the main clock (f(XIN)) oscillation by bit 1 of register MR.
Switch the system clock by bit 0 of register MR.
Also, when system clock is switched after main clock oscillation is started,
generate the oscillation stabilizing wait time by program if necessary.
Set the on-chip oscillator clock oscillation by register RG.
Main clock: RC oscillation circuit
On-chip oscillator: operating
System clock: on-chip oscillator clock
Main clock: Quartz-crystal circuit
On-chip oscillator: operating
System clock: on-chip oscillator clock
(1) Main clock generating circuit (f(XIN))
The ceramic resonator, RC oscillation or quartz-crystal oscillator
can be used for the main clock of this MCU.
After system is released from reset, the MCU starts operation by
the clock output from the on-chip oscillator which is the internal os-
cillator.
When the ceramic resonator is used, execute the CMCK instruc-
tion. When the RC oscillation is used, execute the CRCK
instruction. When the quartz-crystal oscillator is used, execute the
CYCK instruction. The oscillation start/stop of main clock f(XIN) is
controlled by bit 1 of register MR. The system clock is selected by
bit 0 of register MR. The oscillation circuit by the CMCK, CRCK or
CYCK instruction can be selected only at once. The oscillation cir-
cuit corresponding to the first executed one of these instructions is
valid.
Execute the CMCK, CRCK or CYCK instruction in the initial setting
routine of program (executing it in address 0 in page 0 is recom-
mended). Also, when the CMCK, CRCK or CYCK instruction is not
executed in program, this MCU operates by the on-chip oscillator.
相关PDF资料 |
PDF描述 |
|---|---|
| M34519M6-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO42 |
| M34553M8H-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48 |
| M34553M4-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48 |
| M34553G8HFP | 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP48 |
| M34553M4H-XXXFP | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48 |
相关代理商/技术参数 |
参数描述 |
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| M34524M8-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34524MC-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:4-BIT CISC SINGLE-CHIP MICROCOMPUTER 720 FAMILY / 4500 SERIES |
| M3452-C09K1 | 制造商:Bonitron 功能描述:OVERVOLTAGE BRAKING TRANSISTOR |
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