- 您现在的位置：买卖IC网 > PDF目录80549 > M37547G2FP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO36 PDF资料下载
参数资料
| 型号： | M37547G2FP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO36 |
| 封装： | 8.40 X 15 MM, 0.80 MM PITCH, PLASTIC, SSOP-36 |
| 文件页数： | 92/97页 |
| 文件大小： | 1064K |
| 代理商： | M37547G2FP |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页当前第92页第93页第94页第95页第96页第97页
REJ03B0156-0122
Rev.1.22
Mar 31, 2009
page 92 of 94
7547 Group
Notes on Watchdog Timer
1. The watchdog timer is operating during the wait mode. Write
data to the watchdog timer control register to prevent timer un-
derflow.
2. The watchdog timer stops during the stop mode. However, the
watchdog timer is running during the oscillation stabilizing time
after the STP instruction is released. In order to avoid the un-
derflow of the watchdog timer, the watchdog timer count source
selection bit (bit 7 of watchdog timer control register (address
003916)) before executing the STP instruction.
3. The STP instruction function selection bit (bit 6 of watchdog
timer control register (address 003916)) can be rewritten only
once after releasing reset. After rewriting it is disable to write
any data to this bit.
Notes on RESET pin
1. Connecting capacitor
In case where the RESET signal rise time is long, connect a ce-
ramic capacitor or others across the RESET pin and the Vss pin.
And use a 1000 pF or more capacitor for high frequency use.
When connecting the capacitor, note the following :
Make the length of the wiring which is connected to a capacitor
as short as possible.
Be sure to verify the operation of application products on the
user side.
<Reason>
If the several nanosecond or several ten nanosecond impulse
noise enters the RESET pin, it may cause a microcomputer fail-
ure.
Notes on A/D conversion
1. Analog input pin
Make the signal source impedance for analog input low, or equip
an analog input pin with an external capacitor of 0.01F to 1F.
Further, be sure to verify the operation of application products on
the user side.
<Reason>
An analog input pin includes the capacitor for analog voltage com-
parison. Accordingly, when signals from signal source with high
impedance are input to an analog input pin, charge and discharge
noise generates. This may cause the A/D conversion/comparison
precision to be worse.
2. Clock frequency during A/D conversion
The comparator consists of a capacity coupling, and a charge of
the capacity will be lost if the clock frequency is too low. This may
cause the A/D conversion precision to be worse. Accordingly, set
f(XIN) in order that the A/D conversion clock is 250 kHz or over
during A/D conversion.
3. A/D conversion clock selection
Select f(XIN)/2 as an A/D conversion clock by setting the A/D con-
version clock selection bit (bit 3 of A/D control register (address
003416)) when RC oscillation is used.
The f(XIN) can be also used as an A/D conversion clock only when
ceramic oscillation or on-chip oscillator is used.
4. Read A/D conversion register
8-bit read
Read only the A/D conversion low-order register (address
003516).
10-bit read
Read the A/D conversion high-order register (address 003616)
first, and then, read the A/D conversion low-order register (ad-
dress 003516).
In this case, the high-order 6 bits of address 003616 returns “0”
when read.
5. A/D conversion accuracy
As for AD translation accuracy, on the following operating condi-
tions, accuracy may become low.
(1) Since the analog circuit inside a microcomputer becomes sen-
sitive to noise when VREF voltage is set up lower than Vcc
voltage, accuracy may become low rather than the case
where VREF voltage and Vcc voltage are set up to the same
value..
(2) When VREF voltage is lower than [ 3.0 V ], the accuracy at the
low temperature may become extremely low compared with
that at room temperature. When the system would be used at
low temperature, the use at VREF=3.0 V or more is recom-
mended.
相关PDF资料 |
PDF描述 |
|---|---|
| M38D58G8-XXXHP | 8-BIT, MROM, 6.25 MHz, MICROCONTROLLER, PQFP80 |
| MC6805R3S | 8-BIT, MROM, MICROCONTROLLER, CDIP40 |
| MC68HC705P6MDW | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| MC908QB4CDT | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO16 |
| MC908QL2CDTE | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M37547G2FP#U0 | 功能描述:MCU 2/5V 8KB 36-SSOP 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:80C 核心处理器:8051 芯体尺寸:8-位 速度:16MHz 连通性:EBI/EMI，I²C，UART/USART 外围设备:POR，PWM，WDT 输入/输出数:40 程序存储器容量:- 程序存储器类型:ROMless EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-LCC（J 形引线） 包装:带卷 (TR) |
| M37547G2-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37547G4FP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37547G4FP#U0 | 功能描述:MCU 2/5V 16K 36-SSOP 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:80C 核心处理器:8051 芯体尺寸:8-位 速度:16MHz 连通性:EBI/EMI，I²C，UART/USART 外围设备:POR，PWM，WDT 输入/输出数:40 程序存储器容量:- 程序存储器类型:ROMless EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-LCC（J 形引线） 包装:带卷 (TR) |
| M37547G4-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
发布紧急采购，3分钟左右您将得到回复。