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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)： | 12/68頁 |
| 文件大?。?/td> | 579K |
| 代理商： | M37544 |
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7544 Group
Rev.1.04 2004.06.08 page 12 of 66
REJ03B0012-0104Z
[CPU mode register] CPUM
The CPU mode register contains the stack page selection bit.
This register is allocated at address 003B
16
.
Switching method of CPU mode register
Switch the CPU mode register (CPUM) at the head of program af-
ter releasing Reset in the following method.
Fig. 12 Switching method of CPU mode register
Fig. 11 Structure of CPU mode register
Processor mode bits (Note 1)
b1 b0
0 0 Single-chip mode
0 1
1 0
Stack page selection bit
0 : 0 page
1 : 1 page
Not available
b7 b0
2:
These bits are used only when a ceramic
oscillation is selected.
Do not use these when an RC oscillation is selected.
Note 1:
The bit can be rewritten only once after releasing reset. After rewriting
it is disable to write any data to the bit. However, by reset the bit is
initialized and can be rewritten, again.
(It is not disable to write any data to the bit for emulator MCU
“M37544RSS”.)
Oscillation mode selection bit (Note 1)
0 : Ceramic/quartz-crystal oscillation
1 : RC oscillation
Clock division ratio selection bits
b7 b6
0 0 : f(
φ
) = f(X
IN
)/2 (High-speed mode)
0 1 : f(
φ
) = f(X
IN
)/8 (Middle-speed mode)
1 0 : applied from on-chip oscillator
1 1 : f(
φ
) = f(X
IN
) (Double-speed mode)(Note 2)
CPU mode register
(CPUM: address 003B
16
, initial value: 80
16
)
On-chip oscillator oscillation control bit
0 : On-chip oscillator oscillation enabled
1 : On-chip oscillator oscillation stop
X
IN
oscillation control bit
0 : Ceramic/quartz-crystal or RC oscillation enabled
1 : Ceramic/quartz-crystal or RC oscillation stop
After releasing reset
Switch the oscillation mode
selection bit (bit 5 of CPUM)
Switch the clock division ratio
selection bits (bits 6 and 7 of CPUM)
Main routine
Start with an on-chip oscillator
An initial value is set as a ceramic/quartz-crystal
oscillation mode. When it is switched to an RC
oscillation, its oscillation starts.
Select 1/1, 1/2, 1/8 or on-chip oscillator.
Wait by on-chip oscillator operation
until establishment of oscillator clock
When using a ceramic/quartz-crystal oscillation, wait
until establlishment of oscillation from oscillation starts.
When using an RC oscillation, wait time is not required
basically (time to execute the instruction to switch from
an on-chip oscillator meets the requirement).
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| 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 |
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