参数资料
型号: M306V8FJFP
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP116
封装: 20 X 20 MM, 0.65 MM PITCH, PLASTIC, LQFP-116
文件页数: 17/77页
文件大小: 2650K
代理商: M306V8FJFP
M306V8FJFP
Rev.1.31
Apr 18, 2005
page 22 of 363
REJ03B0082-0131
Reset
There are three types of resets: a hardware reset, a software reset, and an watchdog timer reset.
Hardware Reset
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_____________
A reset is applied using the RESET pin. When an “L” signal is applied to the RESET pin while the power
supply voltage is within the recommended operating condition, the pins are initialized (see Table 3.1. Pin
____________
Status When RESET Pin Level is “L”). The oscillation circuit is initialized and the main clock starts oscil-
____________
lating. When the input level at the RESET pin is released from “L” to “H”, the CPU and SFR are initialized,
and the program is executed starting from the address indicated by the reset vector. The internal RAM is
____________
not initialized. If the RESET pin is pulled “L” while writing to the internal RAM, the internal RAM becomes
indeterminate.
Figure 3.1 shows the example reset circuit. Figure 3.2 shows the reset sequence. Table 3.1 shows the
____________
status of the other pins while the RESET pin is “L”. Figure 3.3 shows the CPU register status after reset.
Refer to “SFR” for SFR status after reset.
1. When the power supply is stable
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(1) Apply an “L” signal to the RESET pin.
(2) Supply a clock for 20 cycles or more to the XIN pin.
(3) Apply an “H” signal to the RESET pin.
2. Power on
____________
(1) Apply an “L” signal to the RESET pin.
(2) Let the power supply voltage increase until it meets the recommended operating condition.
(3) Wait td(P-R) or more until the internal power supply stabilizes.
(4) Supply a clock for 20 cycles or more to the XIN pin.
____________
(5) Apply an “H” signal to the RESET pin.
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