- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45035 > M37545G1KP 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO32 PDF資料下載
參數(shù)資料
| 型號： | M37545G1KP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO32 |
| 封裝： | 11 X 5.60 MM, 0.65 MM PITCH, PLASTIC, LSSOP-32 |
| 文件頁數(shù)： | 32/63頁 |
| 文件大?。?/td> | 774K |
| 代理商： | M37545G1KP |
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頁當前第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
Rev.1.07
Mar 19, 2009
Page 38 of 60
REJ03B0140-0107
7545 Group
CLOCK GENERATING CIRCUIT
An oscillation circuit can be formed by connecting a resonator
between XIN and XOUT.
Use the circuit constants in accordance with the resonator
manufacturer's recommended values.
No external resistor is needed between XIN and XOUT since a
feed-back resistor exists on-chip. (An external feed-back resistor
may be needed depending on conditions.)
<Ceramic resonator/quartz-crystal oscillator>
When the ceramic resonator/quartz-crystal oscillator is used for
the main clock, connect the ceramic resonator/quartz-crystal
oscillator and the external circuit to pins XIN and XOUT at the
shortest distance. A feedback resistor is built in between pins XIN
and XOUT. (An external feed-back resistor may be needed
depending on conditions.)
Oscillation Control
1. Stop mode
When the STP instruction is executed, the internal clock
φ stops
at an “H” level and the XIN oscillator stops. At this time, timer 1
is set to “0316” and prescaler 1 is set to “FF16”when the
oscillation stabilization time set bit after release of the STP
instruction is “0”. On the other hand, timer 1 and prescaler 1 are
not set when the above bit is “1”. Accordingly, set the wait time
fit for the oscillation stabilization time of the oscillator to be
used. When an external interrupt is accepted, oscillation is
restarted but the internal clock
φ remains at “H” until timer 1
underflows. As soon as timer 1 underflows, the internal clock
φ
is supplied. This is because when a ceramic resonator is used,
some time is required until a start of oscillation.
In the stop mode, the voltage drop detection circuit is stopped, so
that the power dissipation is reduced.
2. Wait mode
If the WIT instruction is executed, the internal clock
φ stops at an
“H” level, but the oscillator does not stop. The internal clock
restarts if a reset occurs or when an interrupt is accepted. Since
the oscillator does not stop, normal operation can be started
immediately after the clock is restarted. To ensure that an
interrupt will be accepted to release the STP or WIT state, the
corresponding interrupt enable bit must be set to “1” before the
STP or WIT instruction is executed.
Fig. 41 External circuit of ceramic resonator/quartz-crystal
oscillator
Fig. 42 Structure of CPU mode register
XIN
XOUT
CIN
COUT
Rd
M37545
Note: Insert a damping resistor if required.
The resistance will vary depending on the oscillator and the
oscillation drive capacity setting.
Use the value recommended by the maker of the oscillator.
Also, if the oscillator manufacturer’s data sheet specifies
that a feedback resistor be added external to the chip
though a feedback resistor exists on-chip, insert a feedback
resistor between XIN and XOUT following the instruction.
Processor mode bits (Note)
b1 b0
0
0 Single-chip mode
0
1
0
1
Not available
b7
b0
Note : The bit can be rewritten only once after releasing reset.
After rewriting, it is disabled to write any data to this bit.
However, by reset the bit is initialized and can be rewritten, again.
It is not disabled to write any data to this bit for emulator MCU gM37545RLSS.h
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 : Not available
0
1 : Not available
1
0 : f(f) = f(XIN)/4
1
1 : Not available
Not used (returns g0h when read)
相關PDF資料 |
PDF描述 |
|---|---|
| M37545G4GP | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP32 |
| M37545G6KP | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO32 |
| M37545G6-XXXGP | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP32 |
| M37545GC-XXXGP | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP32 |
| M37545G6GP | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP32 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M37545G2KP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37545G4GP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37545G4GP#U0 | 功能描述:MCU 2/5V 16K 32-LQFP QZ-ROM 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) |
| M37545G4KP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37545G4-XXXGP | 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。