參數(shù)資料
型號(hào)： M37542M4T-XXXGP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP32
封裝： 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32
文件頁(yè)數(shù)： 61/68頁(yè)
文件大?。?/td> 1191K
代理商： M37542M4T-XXXGP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
7542 Group
MITSUBISHI MICROCOMPUTERS
64
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
s Notes on Clock Generating Circuit
For use with the oscillation stabilization set bit after release of the
STP instruction set to “1”, set values in timer 1 and prescaler 1 af-
ter fully appreciating the oscillation stabilization time of the
oscillator to be used.
Switch of ceramic and RC oscillations
After releasing reset the operation starts by starting a built-in ring
oscillator. Then, a ceramic oscillation or an RC oscillation is se-
lected by setting bit 5 of the CPU mode register.
Double-speed mode
When a ceramic oscillation is selected, a double-speed mode can
be used. Do not use it when an RC oscillation is selected.
CPU mode register
Bits 5, 1 and 0 of CPU mode register are used to select oscillation
mode and to control operation modes of the microcomputer. In or-
der to prevent the dead-lock by error-writing (ex. program
run-away), these bits can be rewritten only once after releasing re-
set. After rewriting it is disable to write any data to the bit. (The
emulator MCU “M37542RSS” is excluded.)
Also, when the read-modify-write instructions (SEB, CLB) are ex-
ecuted to bits 2 to 4, 6 and 7, bits 5, 1 and 0 are locked.
Clock division ratio, XIN oscillation control, ring oscillator control
The state transition shown in Fig. 79 can be performed by setting
the clock division ratio selection bits (bits 7 and 6), XIN oscillation
control bit (bit 4), ring oscillator oscillation control bit (bit 3) of CPU
mode register. Be careful of notes on use in Fig. 79.
s Notes on Ring Oscillation Division Ratio
When system is released from reset, ROSC/8 (ring middle-speed
mode) is selected for CPU clock.
When state transition from the ceramic or RC oscillation to ring oscil-
lator, ROSC/8 (ring middle-speed mode) is selected for CPU clock.
When the MCU operates by ring-oscillator for the main clock
without external oscillation circuit, connect XIN pin to VCC
through a resistor and leave XOUT pin open.
Set “10010x002” (x = 0 or 1) to CPUM.
s Notes on Oscillation Stop Detection Circuit
When the oscillation stop reset bit is set to “0”, internal reset
does not occur. If the ceramic or RC oscillation is selected for
the CPU clock, MCU will be locked when the ceramic or RC os-
cillation is stopped. So when the ceramic or RC oscillation is
selected for the main clock, set the oscillation stop reset bit to
“1”. (State 2’a of Fig. 81)
Ceramic or RC oscillation stop detection function active bit is not
cleared by the oscillation stop internal reset. Accordingly, the
oscillation stop detection circuit is in active when system is re-
leased from internal reset cause of oscillation stop detection.
Oscillation stop detection status bit is initialized by the following
operation.
(1) External reset
(2) Write “0” data to the ceramic or RC oscillation stop detection
function active bit.
The oscillation stop detection circuit is not included in the emu-
lator MCU “M37542RSS”.
DATA REQUIRED FOR MASK ORDERS
The following are necessary when ordering a mask ROM produc-
tion:
1.Mask ROM Order Confirmation Form *
2.Mark Specification Form *
3.Data to be written to ROM, in EPROM form (three identical cop-
ies) or one floppy disk.
* For the mask ROM confirmation, ROM programming order con-
firmation and the mark specifications, refer to the “Mitsubishi
MCU Technical Information” Homepage
(http://www.infomicom.maec.co.jp/indexe.htm).
相關(guān)PDF資料
PDF描述
MC9S12DJ256BMPV 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
MC9S12DJ256BVPV 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
MC68HC908QT1MP 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP8
MC68HC908QY1MDT 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO16
MC68332GCPV25 32-BIT, 25 MHz, MICROCONTROLLER, PQFP144
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M37542M4-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:USB 至 1-Wire? RJ11 適配器 適用于相關(guān)產(chǎn)品:1-Wire? 設(shè)備 產(chǎn)品目錄頁(yè)面:1429 (CN2011-ZH PDF)
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*