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M38039G8HKP датащи(PDF) 62 Page - Renesas Technology Corp

номер детали M38039G8HKP
подробное описание детали  SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
PDF  92 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M38039G8HKP датащи(HTML) 62 Page - Renesas Technology Corp

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Rev.1.10
Nov 14, 2005
Page 62 of 91
REJ03B0166-0110
3803 Group (Spec.H QzROM version)
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
RESET CIRCUIT
To reset the microcomputer, RESET pin should be held at an “L”
level for 16 cycles or more of XIN. Then the RESET pin is
returned to an “H” level (the power source voltage should be
between 1.8 V and 5.5 V, and the oscillation should 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 0.29 V for VCC of 1.8 V.
Fig 56. Reset circuit example
Fig 57. Reset sequence
VCC
RESET
VCC
RESET
Power source voltage
detection circuit
Example at VCC = 5 V
1.8 V
0 V
0 V
VCC
RESET
0.29 V or less
RESET
Internal
reset
Data
φ
Address
SYNC
XIN
?
?
?
?
FFFC
FFFD
ADH,L
?
?
?
?ADL
ADH
Notes 1: The frequency relation of f(XIN) and f(
φ) is f(XIN) = 8 • f(φ).
2: The question marks (?) indicate an undefined state that depends on the previous state.
Reset address from the
vector table.
XIN : 10.5 to 18.5 clock cycles



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