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參數(shù)資料
| 型號： | MC68HC08MR4 |
| 廠商： | Motorola, Inc. |
| 英文描述： | In-Circuit Simulator |
| 中文描述： | 在電路模擬器 |
| 文件頁數(shù)： | 24/100頁 |
| 文件大?。?/td> | 506K |
| 代理商： | MC68HC08MR4 |
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User
’
s Manual
M68ICS08MR In-Circuit Simulator
24
Preparation and Installation
MOTOROLA
Preparation and Installation
2.2.2.7 Board Reset Selection Jumper (W7)
When the power to the MCU is turned on, there is a delay of a few hundred
milliseconds during which the ICS_RST signal is held low (set by U11).
When ICS_RST goes high, the binary ripple counter (U10) begins counting
clock cycles. After 1024 clock cycles are counted, the DELAY_RESET and
DELAY_RESET_1 signals toggle and the counter stops counting. The delayed
reset signals are used to turn on communications to the MCU and to hold several
MCU pins in appropriate states to force monitor mode on power up.
Use jumper W7 (
Figure 2-7
) to set the ripple counter reset rate. Install the
jumper on jumper header pins 1 and 2 (factory default) to select the MR16/32
clock, which causes Y1 to drive the counter at the factory installed rate of
4.9152 MHz. Use this setting when using the MC68HC908MR16/32 MCUs.
Install the jumper on jumper header pins 2 and 3 to select the MR4/8 clock. This
sets Y2 to drive the counter at the factory installed rate of 4.0000 MHz. Use this
setting when using the MC68HC(9)08MR4/8 MCUs.
Figure 2-7. Board Reset Selection Jumper (W7)
1
2
3
W7
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| MC68HC08QY1 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC08 Microcontrollers |
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