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参数资料
| 型号： | M37544G2SP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| 封装： | 0.400 INCH, 1.78 MM PITCH, PLASTIC, SDIP-32 |
| 文件页数： | 66/68页 |
| 文件大小： | 738K |
| 代理商： | M37544G2SP |
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7544 Group
Rev.1.04
2004.06.08
page 7 of 66
REJ03B0012-0104Z
PIN DESCRIPTION
Table 1 Pin description
Function
Apply voltage of 4.0 to 5.5 V to Vcc, and 0 V to Vss.
Reference voltage input pin for A/D converter
Chip operating mode control pin, which is always connected to Vss.
Reset input pin for active “L”
Input and output pins for main clock generating circuit
Connect a ceramic resonator or quartz-crystal oscillator between the XIN and XOUT pins.
For using RC oscillator, short between the XIN and XOUT pins, and connect the capacitor and resistor.
If an external clock is used, connect the clock source to the XIN pin and leave the XOUT pin open.
When the on-chip oscillator is selected as the main clock, connect XIN pin to VCC and leave XOUT open.
Function expect a port function
Name
Power source
Analog reference
voltage
CNVss
Reset input
Clock input
I/O port P0
I/O port P1
Pin
Vcc, Vss
VREF
CNVss
______
RESET
XIN
P00/CNTR1
P01
P02
P03/TXOUT
P04–P07
Key-input (key-on wake up
interrupt input) pins
Timer X and timer A function
pin
8-bit I/O port.
I/O direction register allows each pin to be individually pro-
grammed as either input or output.
CMOS compatible input level
CMOS 3-state output structure
P0 can output a large current for driving LED.
Whether a built-in pull-up resistor is to be used or not can be de-
termined by program.
5-bit I/O port
I/O direction register allows each pin to be individually pro-
grammed as either input or output.
CMOS compatible input level
CMOS 3-state output structure
CMOS/TTL level can be switched for P10 and P12
6-bit I/O port having almost the same function as P0
CMOS compatible input level
CMOS 3-state output structure
P10/RxD
P11/TxD
P12/SCLK
____
P13/SRDY
P14/CNTR0
P20/AN0–P25/AN5
P30–P33
P34/INT1
P37/INT0
I/O port P2
I/O port P3
Serial I/O function pin
Timer X function pin
Input pins for A/D converter
Interrupt input pins
6-bit I/O port
I/O direction register allows each pin to be individually programmed as either input or output.
CMOS compatible input level (CMOS/TTL level can be switched for P34 and P37).
CMOS 3-state output structure
P3 can output a large current for driving LED.
XOUT
Clock output
Whether a built-in pull-up resistor is to be used or not can be de-
termined by program.
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