- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄359059 > M37544 (Renesas Technology Corp.) SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER PDF資料下載
參數(shù)資料
| 型號： | M37544 |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機 |
| 文件頁數(shù)： | 64/68頁 |
| 文件大?。?/td> | 579K |
| 代理商： | M37544 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁當前第64頁第65頁第66頁第67頁第68頁
7544 Group
Rev.1.04 2004.06.08 page 64 of 66
REJ03B0012-0104Z
4. I/O pin function when serial I/O is enabled.
The pin functions of P1
2
/S
CLK
and P1
3
/S
RDY
are switched to as
follows according to the setting values of a serial I/O mode selec-
tion bit (bit 6 of serial I/O control register (address 1A
16
)) and a
serial I/O synchronous clock selection bit (bit 1 of serial I/O control
register).
(1) Serial I/O mode selection bit
→
“1” :
Clock synchronous type serial I/O is selected.
Setup of a serial I/O synchronous clock selection bit
“0” : P1
2
pin turns into an output pin of a synchronous clock.
“1” : P1
2
pin turns into an input pin of a synchronous clock.
Setup of a S
RDY
output enable bit (SRDY)
“0” : P1
3
pin can be used as a normal I/O pin.
“1” : P1
3
pin turns into a S
RDY
output pin.
(2) Serial I/O mode selection bit
→
“0” :
Clock asynchronous (UART) type serial I/O is selected.
Setup of a serial I/O synchronous clock selection bit
“0”: P1
2
pin can be used as a normal I/O pin.
“1”: P1
2
pin turns into an input pin of an external clock.
When clock asynchronous (UART) type serial I/O is selected, it
functions P1
3
pin. It can be used as a normal I/O pin.
Notes on A/D conversion
1. Analog input pin
In order to execute the A/D conversion correctly, to complete the
charge to an internal capacitor within the specified time is re-
quired. The maximum output impedance of the analog input
source required to complete the charge to a capacitor within the
specified time is as follows;
About 35 k
(at f(X
IN
) = 8 MHz)
When the maximum output impedance exceeds the above value,
equip an analog input pin with an external capacitor of 0.01
μ
F to
1
μ
F between an analog input pin and V
SS
.
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(X
IN
) in order that the A/D conversion clock is 500 kHz or over
during A/D conversion.
3. 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 V
REF
voltage is set up lower than Vcc
voltage, accuracy may become low rather than the case
where V
REF
voltage and Vcc voltage are set up to the same
value.
(2) When V
REF
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 V
REF
=3.0 V or more is recom-
mended.
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 control
register must be written just before executing the
STP
instruc-
tion.
3. The
STP
instruction disable bit (bit 6 of watchdog timer control
register (address 39
16
)) can be set to “1” but cannot be set to
“0” by program.
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.
相關PDF資料 |
PDF描述 |
|---|---|
| M37548G1FP | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37549G1FP | 32K x 8 Static RAM; Density: 256 Kb; Organization: 32Kb x 8; Vcc (V): 4.5 to 5.5 V; |
| M38030F2L-XXXWG | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38122E7-XXXFS | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38232GC-XXXFP | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M37544G2AGP | 制造商:Renesas Electronics Corporation 功能描述:MCU 8BIT 740 CISC 8KB ROM 5V 32LQFP - Trays |
| M37544G2AGP#U0 | 功能描述:IC 740 MCU OTP 8K 32LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 產(chǎn)品培訓模塊:MCU Product Line Introduction AVR® UC3 Introduction 標準包裝:2,500 系列:AVR®32 UC3 B 核心處理器:AVR 芯體尺寸:32-位 速度:60MHz 連通性:I²C，IrDA，SPI，SSC，UART/USART，USB 外圍設備:欠壓檢測/復位，DMA，POR，PWM，WDT 輸入/輸出數(shù):28 程序存儲器容量:128KB（128K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:32K x 8 電壓 - 電源 (Vcc/Vdd):1.65 V ~ 1.95 V 數(shù)據(jù)轉換器:A/D 6x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:48-TQFP 包裝:帶卷 (TR) 配用:ATSTK600-TQFP48-ND - STK600 SOCKET/ADAPTER 48-TQFPATAVRONEKIT-ND - KIT AVR/AVR32 DEBUGGER/PROGRMMRATEVK1101-ND - KIT DEV/EVAL FOR AVR32 AT32UC3B 其它名稱:AT32UC3B1128-AUR-NDAT32UC3B1128-AURTR |
| M37544G2ASP#U0 | 功能描述:MCU 2/5V 8K 32-SDIP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 標準包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI，I²C，UART/USART 外圍設備:POR，PWM，WDT 輸入/輸出數(shù):40 程序存儲器容量:- 程序存儲器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC（J 形引線） 包裝:帶卷 (TR) |
| M37544G2GP | 功能描述:IC 740 MCU OTP 8K 32LQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 產(chǎn)品培訓模塊:MCU Product Line Introduction XMEGA Introduction AVR XMEGA USB Connectivity 標準包裝:90 系列:AVR® XMEGA 核心處理器:AVR 芯體尺寸:8/16-位 速度:32MHz 連通性:I²C，IrDA，SPI，UART/USART 外圍設備:欠壓檢測/復位，DMA，POR，PWM，WDT 輸入/輸出數(shù):50 程序存儲器容量:192KB（96K x 16） 程序存儲器類型:閃存 EEPROM 大小:4K x 8 RAM 容量:16K x 8 電壓 - 電源 (Vcc/Vdd):1.6 V ~ 3.6 V 數(shù)據(jù)轉換器:A/D 16x12b; D/A 2x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:64-TQFP 包裝:托盤 配用:ATSTK600-RC14-ND - STK600 SOCKET/ADAPTER 64TQFPATSTK600-TQFP64-ND - STK600 SOCKET/ADAPTER 64-TQFPATAVRONEKIT-ND - KIT AVR/AVR32 DEBUGGER/PROGRMMRATAVRISP2-ND - PROGRAMMER AVR IN SYSTEM |
| M37544G2HP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
發(fā)布緊急采購，3分鐘左右您將得到回復。