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| 型号： | M38C29MCA-XXXHP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | 10 X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64 |
| 文件页数： | 5/104页 |
| 文件大小： | 1327K |
| 代理商： | M38C29MCA-XXXHP |
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Rev.2.00
May 28, 2004
page 100 of 100
38C2 Group (A Version)
Notes on Reset Circuit
1. Reset input voltage control
Make sure that the reset input voltage is less than 0.2 Vcc for Vcc(min).
2. Countermeasures for reset signal slow rising
In case where the RESET signal rise time is long, connect a ceramic
capacitor or others across the RESET pin and the Vss pin. Use a
1000 pF or more capacitor for high frequency use. When connecting
the capacitor, note the following:
Make the length of the wiring which is connected to a capacitor as
short as possible.
Be sure to verify the operation of application products on the user
side.
<Reason>
If the several nanosecond or several ten nanosecond impulse noise
enters the RESET pin, it may cause a microcomputer failure.
3. Port state immediately after reset
Table 1 shows the each pin state during RESET pin is “ L” .
Table 1 Each pin state during RESET pin is “ L”
Pin name
P0– P2 (SEG0– SEG23)
P3, P4, P5, P60– P62
COM0–COM3
Pin state
Input mode (with pull-up)
Input mode (high-impedance)
Vcc level input
4. Frequency relation of f(XIN) and f(
φ)
The frequency relation of f(XIN) and f(
φ) is f(XIN) = 8 f(φ).
Notes on Reset Circuit
1. Mode transition
(1) Both the main clock (XIN-XOUT) and sub-clock (XCIN-XCOUT) need
time for the oscillations to stabilize. The mode transition between
middle-/high-speed and low-speed mode must be performed af-
ter the corresponding clock becomes stable. The sub-clock, needs
extra time to stabilize particularly when executing operations af-
ter power-on and stop mode. The main and sub clocks require
the following condition for mode transition.
f(XIN) > 3 f(XCIN)
(2) The all modes can be switched to the stop mode or the wait mode
and return to the source mode when the stop mode or the wait
mode is ended.
2. State transitions of system clock
When the mode is switched from frequency/2/4/8 to the low-speed
mode, or the opposite is performed, change CM7 (bit 7 of system
clock control bits of CPU mode register (address 003B16)) at first,
and then, change CM6 (bit 6 of system clock control bits of CPU
mode register (address 003B16)) after the oscillation of the changed
mode is stabilized.
3. Wait mode
Timer and LCD operate in the wait mode.
Notes on Oscillation External Output Function
When the signal from the XOUT pin or XCOUT pin of the oscillation
circuit is input directly to the circuit except this MCU and used, the
system operation may be unstabilized.
In order to share the oscillation circuit safely, use the clock output
from P40 and P41 by the oscillation external output function for the
circuits except this MCU.
NOTES ON HARDWARE
Handling of Source Pins
In order to avoid a latch-up occurrence, connect a capacitor suitable
for high frequencies as bypass capacitor between power source pin
(VCC pin) and GND pin (VSS pin). Besides, connect the capacitor to
as close as possible. For bypass capacitor which should not be lo-
cated too far from the pins to be connected, a ceramic capacitor of
0.01
F– 0.1F is recommended.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M38C29MC-XXXFP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38C29MC-XXXHP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38C29RLFS | 功能描述:EMULATOR MCU FOR A-VERSION 38C2 RoHS:否 类别:编程器，开发系统 >> 内电路编程器、仿真器以及调试器 系列:- 产品变化通告:Development Systems Discontinuation 19/Jul/2010 标准包装:1 系列:* 类型:* 适用于相关产品:* 所含物品:* |
| M38C29T-64FPD | 功能描述:DEV 100-PIN RFS/MCU TO 64-PIN 0. RoHS:否 类别:编程器，开发系统 >> 配件 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 标准包装:1 系列:- 附件类型:USB 至 1-Wire? RJ11 适配器 适用于相关产品:1-Wire? 设备 产品目录页面:1429 (CN2011-ZH PDF) |
| M38C29T-64LCA | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:Converter from 100-pin RFS Type Emulator MCU to 64-pin 0.8mm-pitch QFP (for 38C1, 38C2, 38K0 and 38K2 Group of 38000 Series) |
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