- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄67774 > M38C29FFAFP 8-BIT, FLASH, 5 MHz, MICROCONTROLLER, PQFP64 PDF資料下載
參數(shù)資料
| 型號： | M38C29FFAFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 5 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-64 |
| 文件頁數(shù)： | 52/104頁 |
| 文件大?。?/td> | 1327K |
| 代理商： | M38C29FFAFP |
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頁當(dāng)前第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頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁
Rev.2.00
May 28, 2004
page 49 of 100
38C2 Group (A Version)
CLOCK GENERATING CIRCUIT
The 38C2 group has two built-in oscillation circuits; main clock XIN–
XOUT and sub-clock XCIN–XCOUT. An oscillation circuit can be formed
by connecting a resonator between XIN and XOUT (XCIN and XCOUT).
Use the circuit constants in accordance with the resonator
manufacturer’s recommended values. No external resistor is needed
between XIN and XOUT since a feedback resistor exists on-chip. How-
ever, an external feedback resistor is needed between XCIN and
XCOUT.
To supply a clock signal externally, input it to the XIN pin and make
the XOUT pin open. The sub clock XCIN-XCOUT oscillation circuit can-
not directly input clocks that are externally generated. Accordingly,
be sure to cause an external resonator to oscillate.
Immediately after poweron, only the XIN oscillation circuit starts os-
cillating, and XCIN and XCOUT pins function as I/O ports.
Frequency Control
(1) Frequency/8 Mode
The system clock
φ is the frequency of XIN divided by 8. After reset is
released, this mode is selected.
(2) Frequency/4 Mode
The system clock
φ is the frequency of XIN divided by 4.
(3) Frequency/2 Mode
The system clock
φ is the frequency of XIN divided by 2.
(4) Low-speed Mode
The system clock
φ is the frequency of XCIN divided by 2. In the low-
speed mode, the low-power dissipation operation can be performed
when the main clock XIN is stopped by setting the bit 7 of the CPU
mode register to “0”. In this case, when main clock XIN oscillation is
restarted, generate the wait time until the oscillation is stable by pro-
gram after the bit 7 of the CPU mode register is set to “ 1” .
Fig. 50 Ceramic resonator circuit
Fig. 51 External clock input circuit
XOUT
CIN
COUT
CCIN
CCOUT
Rf
XCIN
XCOUT
XIN
Rd
(Note)
Note: An external feed-back resistor may be
needed depending on conditions.
s Notes on Clock Generating Circuit
If you switch the mode between frequency/2/4, or 8 and low-speed,
stabilize both XIN and XCIN oscillations. The sufficient time is required
for the sub clock to stabilize, especially immediately after power on
and at returning from stop mode. When switching the mode, set the
frequency in the condition that f(XIN) > 3 f(XCIN).
Oscillation Control
(1) Stop Mode
If the STP instruction is executed, the system clock
φ stops at an “H”
level, and main clock and sub-clock oscillators stop.
In this time, values set previously to timer 1 latch and timer 2 latch
are loaded automatically to timer 1 and timer 2. Set the values to
generate the wait time required for oscillation stabilization to timer 1
latch and timer 2 latch (low-order 8 bits of timer 1 and high-order 8
bits of timer 2) before the STP instruction.
The frequency divider for timer 1 is used for the timer 1 count source,
and the output of timer 1 is forcibly connected to timer 2. In this time,
bits 0 to 5 of the timer 12 mode register are cleared to “ 0” .
The values of the timer 12 frequency divider selection register are
not changed.
Set the interrupt enable bits of the timer 1 and timer 2 to disabled
(“ 0” ) before executing the STP instruction.
Oscillator restarts when reset occurs or an interrupt request is re-
ceived, but the system clock
φ is not supplied to the CPU until timer 2
underflows. This allows time for the clock circuit oscillation to stabi-
lize.
(2) Wait Mode
If the WIT instruction is executed, only the system clock
φ stops at an
“H” state. The states of main clock and sub clock are the same as the
state before executing the WIT instruction, and oscillation does not
stop. Since supply of system clock
φ is started immediately after the
interrupt is received, the instruction can be executed immediately.
XCOUT
XIN
XOUT
VCC
VSS
Open
External oscillation
circuit
Rd
Rf
CCOUT
CCIN
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M38K29F8LHP | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP64 |
| M38K27M4L-XXXFP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64 |
| M38K29RFS | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, CPGA100 |
| M41ST85YMH6 | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| M41ST85YMX6TR | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38C29FFAFP#U0 | 功能描述:IC 740/38C2 MCU FLASH 64LQFP 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(xùn)模塊:CAN Basics Part-1 CAN Basics Part-2 Electromagnetic Noise Reduction Techniques Part 1 M16C Product Overview Part 1 M16C Product Overview Part 2 標(biāo)準(zhǔn)包裝:1 系列:M16C™ M32C/80/87 核心處理器:M32C/80 芯體尺寸:16/32-位 速度:32MHz 連通性:EBI/EMI，I²C，IEBus，IrDA，SIO，UART/USART 外圍設(shè)備:DMA，POR，PWM，WDT 輸入/輸出數(shù):121 程序存儲器容量:384KB（384K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:24K x 8 電壓 - 電源 (Vcc/Vdd):3 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 34x10b，D/A 2x8b 振蕩器型:內(nèi)部 工作溫度:-20°C ~ 85°C 封裝/外殼:144-LQFP 包裝:托盤 產(chǎn)品目錄頁面:749 (CN2011-ZH PDF) 配用:R0K330879S001BE-ND - KIT DEV RSK M32C/87 |
| M38C29FFAHP | 制造商:Renesas Electronics Corporation 功能描述:MCU 3/5V 60K 64-LQFP - Trays |
| M38C29FFAHP#U0 | 制造商:Renesas Electronics Corporation 功能描述:MCU 8BIT 740 CISC 60KB FLASH 5V 64LQFP - Trays |
| M38C29FFFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38C29FFHP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 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(fù)。