參數(shù)資料
型號： M37542M4-XXXFP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO36
封裝： 8.4 X 15 MM, 0.80 MM PITCH, PLASTIC, SSOP-36
文件頁數(shù)： 35/124頁
文件大?。?/td> 1238K
代理商： M37542M4-XXXFP
7542 Group
Rev.3.03
Jul 11, 2008
Page 16 of 117
REJ03B0006-0303
[CPU mode register] CPUM
The CPU mode register contains the stack page selection bit, etc..
This register is allocated at address 003B16.
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. 14 Switching method of CPU mode register
Fig. 13 Structure of CPU mode register
Oscillation mode selection bit (Note 1)
0 : Ceramic oscillation
1 : RC oscillation
CPU mode register
(CPUM: address 003B16, initial value: 8016)
Stack page selection bit
0 : 0 page
1 : 1 page
Clock division ratio selection bits
b7 b6
0
0 : f(φ) = f(XIN)/2 (High-speed mode)
0
1 : f(φ) = f(XIN)/8 (Middle-speed mode)
1
0 : applied from on-chip oscillator
1
1 : f(φ) = f(XIN) (Double-speed mode)(Note 2)
On-chip oscillator oscillation control bit
0 : On-chip oscillator oscillation enabled
1 : On-chip oscillator oscillation stop
XIN oscillation control bit
0 : Ceramic or RC oscillation enabled
1 : Ceramic or RC oscillation stop
Processor mode bits (Note 1)
b1 b0
0
0 Single-chip mode
0
1
0
1
Not available
b7
b0
2: These bits are used only when a ceramic oscillation is selected.
Note 1: These bits can be rewritten only once after releasing reset. After rewriting
it is disable to write any data to bits. However, by reset bits are
initialized and can be rewritten, again.
(It is not disable to write any data to bits for emulator MCU
“M37542RSS”.)
Do not use these when an RC oscillation is selected.
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
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 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).
Note: After system is released from reset, an on-chip oscillator turns active automatically
and system operation is started.
相關PDF資料
PDF描述
M38039GCH-XXXHP 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PQFP64
M38049MF-XXXFP 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PQFP64
M102P1000.0000AK 1000 MHz, OTHER CLOCK GENERATOR, MDIP24
M306V0ME-XXXFP 16-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP100
M32170F6VFP 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP240
相關代理商/技術參數(shù)
參數(shù)描述
M37542M4-XXXGP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M37542M4-XXXHP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M37542M4-XXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M37542RSS 功能描述:DEV EMULATION EVA CHIP FOR M3754 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 配件 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 標準包裝:1 系列:- 附件類型:USB 至 1-Wire? RJ11 適配器 適用于相關產(chǎn)品:1-Wire? 設備 產(chǎn)品目錄頁面:1429 (CN2011-ZH PDF)
M37544 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。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*