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參數(shù)資料
| 型號： | ML63P238 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | 4-Bit Microcontroller with Built-in 16K Word PROM, POCSAG Decoder, and Melody Circuit(帶內(nèi)置16K字PROM，POCSAG譯碼器和音頻電路的4位微控制器) |
| 中文描述： | 4位微控制器內(nèi)置16K的Word中胎膜早破，POCSAG碼解碼器，和旋律電路（帶內(nèi)置16K的字胎膜早破，POCSAG碼譯碼器和音頻電路的4位微控制器） |
| 文件頁數(shù)： | 6/28頁 |
| 文件大?。?/td> | 173K |
| 代理商： | ML63P238 |
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Semiconductor
MSM63P238
6/28
PIN DESCRIPTIONS
The basic functions of each pin of the MSM63P238 are described in Table 1.
A symbol with a slash (/) denotes a pin that has a secondary function.
Refer to Table 2 for secondary functions.
For type, "—" denotes a power supply pin, "I" an input pin, "O" an output pin, and "I/O" an input-
output pin.
Table 1 Pin Descriptions (Basic Functions)
Function
Symbol
V
PP
Type
—
Description
V
DD
V
SS
V
DDR
Positive power supply
Negative power supply
Interface power supply for SIGIN, BS1, BS2
Positive power supply pin for external interface
(power supply for input, output, and I/O ports)
Positive power supply pin for internal logic (internally generated).
A capacitor (0.1
m
F) should be connected between this pin and V
SS
.
Positive power supply pin for low-speed clock (internally generated)
V
DDI
V
DDL
V
DDH
Voltage multiplier pin for power supply backup
(internally generated).
A capacitor (1.0
m
F) should be connected between this pin and V
SS
.
Pins to connect a capacitor for voltage multiplier.
A capacitor (1.0
m
F) should be connected between CB1 and CB2.
Clock oscillation pins for POCSAG decoder.
A 32.768 kHz, 38.4 kHz, or 76.8 kHz crystal and capacitor (C
G
)
should be connected to these pins.
Low-speed clock oscillation pins for CPU.
A 32.768 kHz crystal and capacitor (C
GM
) should be connected
to these pins.
CB1
CB2
XT0
I
XT1
O
XTM0
I
XTM1
O
OSC0
I
High-speed clock oscillation pins.
A ceramic resonator and capacitors (C
L0
, C
L1
) or external
oscillation resistor (R
OS
) should be connected to these pins.
Low-speed CPU clock select pins.
These pins are used to select a low-speed CPU clock.
Because these are high impedance inputs, be sure to tie these
pins to V
DD
or V
SS
.
Input pins for testing.
Pull-down resistors are internally connected to these pins.
The user cannot use these pins.
Reset input pin.
Setting this pin to "H" level puts this device into a reset state.
T
hen, setting this pin to "L" level starts executing an instruction
from address 0000H.
A pull-down resistor is internally connected to this pin.
OSC1
O
XTSEL0
I
XTSEL1
TST1
TST2
TST3
I
RESET
I
Power
Supply
Oscillation
Test
Reset
V
DD2
31
32
13
36
27
26
28
29
30
14
15
23
24
19
20
21
22
16
17
18
34
Pin
35
Power supply (+12.5 V) for PROM writing
—
—
—
—
—
—
—
—
—
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