参数资料
型号: M38507F8AFP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 6.25 MHz, MICROCONTROLLER, PDSO42
封装: 8.40 X 17.50 MM, 0.80 MM PITCH, PLASTIC, SSOP-42
文件页数: 30/59页
文件大小: 885K
代理商: M38507F8AFP
Rev.2.13
Apr 17, 2009
Page 36 of 56
REJ03B0125-0213
3850 Group (Spec.A QzROM version)
RESET CIRCUIT
To reset the microcomputer, RESET pin must be held at an “L”
level for 20 cycles or more of XIN. Then the RESET pin is
returned to an “H” level (the power source voltage must be
between 1.8 V and 5.5 V, and the oscillation must be stable),
reset is released. After the reset is completed, the program starts
from the address contained in address FFFD16 (high-order byte)
and address FFFC16 (low-order byte). Make sure that the reset
input voltage is less than 0.28 V for VCC of 1.8 V.
Fig 39. Reset circuit example
Fig 40. Reset sequence
(Note)
0.16VCC
0V
Poweron
VCC
Power source
voltage detection
circuit
Power
source
voltage
Reset
input
voltage
Note : Reset release voltage; VCC = 1.8 V
RESET
VCC
RESET
Data
φ
Address
SYNC
XIN: 8 to 13 clock cycles
XIN
Notes1: The frequency relation of f(XIN) and f(
φ) is f(XIN) = 2 × f(φ).
2: The question marks (?) indicate an undefined state that depends on the previous state.
3: All signals except XIN and RESET are internals.
RESETOUT
?
FFFC
ADH,L
?
ADL
ADH
?
Reset address from the vector table.
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相关代理商/技术参数
参数描述
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