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| 型号： | M38039FFFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 16.8 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | 14 X 14 MM, 0.80 MM PITCH, PLASTIC, QFP-64 |
| 文件页数： | 123/136页 |
| 文件大小： | 2007K |
| 代理商： | M38039FFFP |
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87
3803/3804 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
CLOCK GENERATING CIRCUIT
The 3803/3804 group has two built-in oscillation circuits: main
clock XIN-XOUT oscillation circuit and sub clock XCIN-XCOUT oscil-
lation circuit. An oscillation circuit can be formed by connecting a
resonator between XIN and XOUT (XCIN and XCOUT). Use the cir-
cuit constants in accordance with the resonator manufacturer’s
recommended values. No external resistor is needed between XIN
and XOUT since a feed-back resistor exists on-chip. However, an
external feed-back resistor is needed between XCIN and XCOUT.
Immediately after power on, only the XIN oscillation circuit starts
oscillating, and XCIN and XCOUT pins function as I/O ports.
Frequency Control
(1) Middle-speed mode
The internal clock
φ is the frequency of XIN divided by 8. After re-
set is released, this mode is selected.
(2) High-speed mode
The internal clock
φ is half the frequency of XIN.
(3) Low-speed mode
The internal clock
φ is half the frequency of XCIN.
(4) Low power dissipation mode
The low power consumption operation can be realized by stopping
the main clock XIN in low-speed mode. To stop the main clock, set
bit 5 of the CPU mode register to “1.” When the main clock XIN is
restarted (by setting the main clock stop bit to “0”), set sufficient
time for oscillation to stabilize.
Oscillation Control
(1) Stop mode
If the STP instruction is executed, the internal clock
φ stops at an
“H” level, and XIN and XCIN oscillators stop. When the oscillation
stabilizing time set after STP instruction released bit is “0,” the
prescaler 12 is set to “FF16” and timer 1 is set to “0116.” When the
oscillation stabilizing time set after STP instruction released bit is
“1,” set the sufficient time for oscillation of used oscillator to stabi-
lize since nothing is set to the prescaler 12 and timer 1.
After STP instruction is released, the input of the prescaler 12 is
connected to count source which had set at executing the STP in-
struction, and the output of the prescaler 12 is connected to timer
1. Set the timer 1 interrupt enable bit to disabled (“0”) before ex-
ecuting the STP instruction. Oscillator restarts when an external
interrupt is received, but the internal clock
φ is not supplied to the
CPU (remains at “H”) until timer 1 underflows. The internal clock
φ
is supplied for the first time, when timer 1 underflows. Therefore
make sure not to set the timer 1 interrupt request bit to “1” before
the STP instruction stops the oscillator. When the oscillator is re-
started by reset, apply “L” level to the RESET pin until the
oscillation is stable since a wait time will not be generated.
(2) Wait mode
If the WIT instruction is executed, the internal clock
φ stops at an
“H” level, but the oscillator does not stop. The internal clock
φ re-
starts when an interrupt is received or reset. Since the oscillator
does not stop, normal operation can be started immediately after
the clock is restarted.
sNote
If you switch the mode between middle/high-speed and low-
speed, stabilize both XIN and XCIN oscillations. The sufficient time
is required for the sub clock to stabilize, especially immediately
after power on and at returning from stop mode. When switching
the mode between middle/high-speed and low-speed, set the fre-
quency on condition that f(XIN) > 3f(XCIN).
When using the quartz-crystal oscillator of high frequency, such
as 16 MHz etc., it may be necessary to select a specific oscillator
with the specification demanded.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M38039FFHFP#U0 | 功能描述:IC 740 MCU FLASH 60K 64QFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 产品培训模块:CAN Basics Part-1 CAN Basics Part-2 Electromagnetic Noise Reduction Techniques Part 1 M16C Product Overview Part 1 M16C Product Overview Part 2 标准包装:1 系列:M16C™ M32C/80/87 核心处理器:M32C/80 芯体尺寸:16/32-位 速度:32MHz 连通性:EBI/EMI，I²C，IEBus，IrDA，SIO，UART/USART 外围设备:DMA，POR，PWM，WDT 输入/输出数:121 程序存储器容量:384KB（384K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:24K x 8 电压 - 电源 (Vcc/Vdd):3 V ~ 5.5 V 数据转换器:A/D 34x10b，D/A 2x8b 振荡器型:内部 工作温度:-20°C ~ 85°C 封装/外壳:144-LQFP 包装:托盘 产品目录页面:749 (CN2011-ZH PDF) 配用:R0K330879S001BE-ND - KIT DEV RSK M32C/87 |
| M38039FFHHP | 功能描述:MCU 3/5V 56K+4K 64-LQFP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 标准包装:250 系列:56F8xxx 核心处理器:56800E 芯体尺寸:16-位 速度:60MHz 连通性:CAN，SCI，SPI 外围设备:POR，PWM，温度传感器，WDT 输入/输出数:21 程序存储器容量:40KB（20K x 16） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:6K x 16 电压 - 电源 (Vcc/Vdd):2.25 V ~ 3.6 V 数据转换器:A/D 6x12b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:48-LQFP 包装:托盘 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| M38039FFH-HP#U | 制造商:Renesas Electronics Corporation 功能描述:8BIT 740 CISC 56KB FLASH 16.8MHZ 3.3/5V - Trays |
| M38039FFHHP#U0 | 功能描述:MCU 3/5V 56K+4K PB-FREE 64-LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 标准包装:250 系列:56F8xxx 核心处理器:56800E 芯体尺寸:16-位 速度:60MHz 连通性:CAN，SCI，SPI 外围设备:POR，PWM，温度传感器，WDT 输入/输出数:21 程序存储器容量:40KB（20K x 16） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:6K x 16 电压 - 电源 (Vcc/Vdd):2.25 V ~ 3.6 V 数据转换器:A/D 6x12b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:48-LQFP 包装:托盘 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| M38039FFHKP#U0 | 制造商:Renesas Electronics Corporation 功能描述:MCU 3/5V 56K+4K PB-FREE 64-LQFP - Trays |
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