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參數(shù)資料
| 型號： | M38D24G6HP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 6.25 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | 10X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64 |
| 文件頁數(shù)： | 95/136頁 |
| 文件大小： | 2856K |
| 代理商： | M38D24G6HP |
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Rev.3.02
Apr 10, 2008
Page 61 of 131
REJ03B0177-0302
38D2 Group
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 1234 frequency divider selection register
are not changed.
Set the interrupt enable bits of the timer 1 and timer 2 to be
disabled (“0”) before executing the STP instruction.
*: Reference (Set values according to your oscillator and system.)
OSCSEL = “L” of the QzROM version and flash memory
version:
.......................................................................... 000516 or more
OSCSEL = “H” of the QzROM version:
..........................................................................01FF16 or more
When an external interrupt is received, the clock set according to
the OSCSEL pin state starts oscillating in the QzROM version.
The operation mode at returning is decided by the clock that set
according to the OSCSEL pin state.
Bits 3, 5, 6, and 7 of CPUM and bit 0 of CPUM2 are forcibly
changed by the OSCSEL pin state. In the flash memory version,
the on-chip oscillator starts oscillating and the operation mode at
returning is set to on-chip oscillator mode. The bit 3 of CPUM is
changed to “0”, bits 5, 6 and 7 of CPUM are changed to “1”, and
the bit 0 of CPUM2 is changed to “0” forcibly.
Oscillator restarts when reset occurs or an interrupt request is
received, but the system clock
φ is not supplied to the CPU until
timer 2 underflows. This allows time for the clock circuit
oscillation to stabilize.
(2) Wait Mode
If the WIT instruction is executed, only the system clock
φ stops
at an “H” state. The states of main clock, on-chip oscillator 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.
Fig. 59 Ceramic resonator circuit example
Fig. 60 External clock input circuit
XCIN XCOUT
XIN
XOUT
CIN
COUT
CCIN
CCOUT
Rf
Rd
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.
Rd
XCIN
XCOUT
XIN
XOUT
External oscillation circuit
Open
VCC
VSS
CCIN
Rf
Rd
CCOUT
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38D24G6HP#U0 | 功能描述:IC 740/38D2 MCU QZ-ROM 64LQFP 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(shè)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(zhuǎn)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) |
| M38D24G6XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38D24G6XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38D24G7XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38D24G7XXXHP | 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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