參數(shù)資料
型號(hào)： M38037M8H-XXXWG
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8.4 MHz, MICROCONTROLLER, PBGA64
封裝： 6 X 6 MM, 0.65 MM PITCH, PLASTIC, FLGA-64
文件頁(yè)數(shù)： 71/111頁(yè)
文件大?。?/td> 1205K
代理商： M38037M8H-XXXWG
Rev.3.02
Nov 05, 2004
page 62 of 108
3803 Group (Spec. H)
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 (between 2.7 V to 5.5 V for flash memory version), 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 for the mask ROM
version is less than 0.29 V for VCC of 1.8 V.
In the flash memory version, input to the RESET pin in the follow-
ing procedure.
qWhen power source is stabilized
(1) Input “L” level to RESET pin.
(2) Input “L” level for 16 cycles or more to XIN pin.
(3) Input “H” level to RESET pin.
qAt power-on
(1) Input “L” level to RESET pin.
(2) Increase the power source voltage to 2.7 V.
(3) Wait for td(P-R) until internal power source has stabilized.
(4) Input “L” level for 16 cycles or more to XIN pin.
(5) Input “H” level to RESET pin.
Fig. 58 Reset sequence
Fig. 57 Reset circuit example
RESET
Internal
reset
Data
φ
Address
SYNC
XIN: 10.5 to 18.5 clock cycles
XIN
?
FFFC
FFFD
ADH,L
?
ADL
ADH
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.
Notes
VCC
RESET
VCC
RESET
Example at VCC = 5V
Note 1: Reset release voltage
mask ROM version: Vcc = 1.8 V
Flash memory version: Vcc = 2.7 V
2: In the flash memory version, this time is required td(P-R)+XIN 16 cycles or more.
(Note 2)
(Note 1)
0.2VCC or less
0V
VCC
RESET
0V
VCC
RESET
td(P-R)+XIN 16 cycles or more
5V
2.7 V
Power source
voltage detection
circuit
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