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| 型号： | M38869FFAHP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 5 MHz, MICROCONTROLLER, PQFP80 |
| 封装： | 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80 |
| 文件页数： | 67/113页 |
| 文件大小： | 1871K |
| 代理商： | M38869FFAHP |
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54
3886 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
COMPARATOR CIRCUIT
Comparator Configuration
The comparator circuit consists of resistors, comparators, a com-
parator control circuit, the comparator reference input selection bit
(bit 7 of address 001D16), a comparator data register (address
002D16), the comparator reference power source input pin (P00/
P3REF) and analog signal input pins (P30–P37). The analog input
pin (P30–P37) also functions as an ordinary digital port.
Comparator Operation
To activate the comparator, first set port P3 to input mode by set-
ting the corresponding direction register (address 000716) to “0” to
use port P3 as an analog voltage input pin. The internal fixed ana-
log voltage (VCC ! 29/32) can be generated by setting “1” to the
comparator reference input selection bit (bit 7) of the serial I/O2
control register (address 001D16). (The internal fixed analog volt-
age becomes about 4.5 V at VCC = 5.0 V.) When setting “0” to the
comparator reference input selection bit, the P00/P3REF pin be-
comes the comparator reference power source input pin and it is
possible to input the comparator reference power source option-
ally from the external. The voltage comparison is immediately
performed by the writing operation to the comparator data register
(address 002D16). After 14 cycles of the internal system clock
φ
(the time required for the comparison), the comparison result is
stored in the comparator register (address 002D16).
If the analog input voltage is greater than the internal reference
voltage, each bit of this register is “1”; if it is less than the internal
reference voltage, each bit of this register is “0”. To perform an-
other comparison, the voltage comparison must be performed
again by writing to the comparator data register (address 002D16).
Read the result when 14 cycles of
φ or more have passed after the
comparator operation starts. The ladder resistor is turned on dur-
ing 14 cycles of
φ , which is required for the comparison, and the
reference voltage is generated. An unnecessary current is not
consumed because the ladder resistor is turned off while the com-
parator operation is not performed. Since the comparator consists
of capacitor coupling, the electric charge is lost if the clock fre-
quency is low.
Keep that the clock frequency is 1 MHz or more during the com-
parator operation. Do not execute the STP, WIT, or port P3 I/O
instruction.
Fig. 52 Comparator circuit
VSS
8
VCC
P3 (8)
P37
P36
P30
b0
Comparator reference input selection
bit (bit 7) of serial I/O2 control
register(address 001D16)
Comparator data register
(address 002D16)
Compar-
ator
Ladder resistor
connecting signal
Comparator
control circuit
Comparator connecting
signal
Compar-
ator
Compar-
ator
P00/P3REF
VCC!29/32
“1”
“0”
Data bus
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M38869FFAHP#UU | 功能描述:IC 740/3886 MCU FLASH 80LQFP 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 |
| M38869FF-XXXHP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38869M1-XXXHP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38869M2-XXXHP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38869M3-XXXHP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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