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参数资料
| 型号： | M34571GD-XXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO24 |
| 封装： | 5.30 X 10.10 MM, 0.80 MM PITCH, PLASTIC, SSOP-24 |
| 文件页数： | 31/33页 |
| 文件大小： | 1526K |
| 代理商： | M34571GD-XXXFP |
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Rev.1.02
May 25, 2007
Page 5 of 124
REJ03B0179-0102
4571 Group
PIN DESCRIPTION
MULTIFUNCTION
Note 1.Pins except above have just single function.
Note 2.The input of D4 can be used even when CNTR0 (output) is selected.
The input/output of D4 can be used even when CNTR0 (input) is selected.
Be careful when using inputs of both CNTR0 and D4 since the input threshold value of CNTR0 pin is different from that of port D4.
Note 3.“H” output function of port C can be used even when the CNTR1 (output) is used.
Note 4.The input/output of P20 can be used even when INT0 is used.
Be careful when using inputs of both INT0 and P20 since the input threshold value of INT0 pin is different from that of port P20.
Note 5.The input/output of P21 can be used even when INT1 is used.
Be careful when using inputs of both INT1 and P21 since the input threshold value of INT1 pin is different from that of port P21.
Table 3
Pin description
Pin
Name
Input/Output
Function
VDD
Power source
Connected to a plus power supply.
VSS
Power source
Connected to a 0 V power supply.
RESET
Reset I/O
I/O
An N-channel open-drain I/O pin for a system reset. When the SRST instruction,
watchdog timer, or the built-in power-on reset causes the system to be reset, the RESET
pin outputs “L” level.
XIN
Main clock input
Input
I/O pins of the main clock generating circuit. Connect a ceramic resonator between pins
XIN and XOUT. A feedback resistor is built-in between them.
XOUT
Main clock output
Output
D0
D4
I/O port D
(Input is examined
by skip decision.)
I/O
Each pin of port D has an independent 1-bit wide I/O function.
The output structure of ports D0–D3 can be switched to N-channel open-drain or CMOS
by software.
For input use, set the latch of the specified bit to “1” and select the N-channel open-drain.
Port D4 is also used as CNTR0 pin.
P00
P03
I/O port P0
I/O
Port P0 serves as a 4-bit I/O port. The output structure is N-channel open-drain.
Port P0 has a key-on wakeup function and a pull-up function.
Both functions can be switched by software.
P10
P13
I/O port P1
I/O
Port P1 serves as a 4-bit I/O port. The output structure is N-channel open-drain.
Port P1 has a key-on wakeup function and a pull-up function.
Both functions can be switched by software.
P20
, P21
I/O port P2
I/O
Port P2 serves as a 2-bit I/O port. The output structure is N-channel open-drain.
For input use, set the latch of the specified bit to “1”.
Ports P20 and P21 are also used as INT0 pin and INT1 pin, respectively.
P30
, P31
I/O port P3
I/O
Port P3 serves as a 2-bit I/O port.
The output structure can be switched to N-channel open-drain or CMOS by software.
For input use, set the latch of the specified bit to “1”.
C
Output port C
Output
Port C serves as a 1-bit output port.
The output structure is CMOS. Port C is also used as CNTR1.
K
Input port K
Input
Port K serves as a 1-bit input port.
It has the key-on wakeup function which can be switched by software.
When port K is used for the input of key matrix, connect a pull-up resistor to it externally.
CNTR0,
CNTR1
Timer I/O
I/O
CNTR0 pin has the function to input the clock for the timer 1 event counter, and to
output the timer 1 or timer 2 underflow signal divided by 2.
CNTR1 pin has the function to output the PWM signal generated by timer 3.
CNTR0 pin and CNTR1 pin are also used as Ports D4 and C, respectively.
INT0, INT1 Interrupt input
Input
INT0 pin and INT1 pin accept external interrupts.
They have the key-on wakeup function which can be switched by software.
INT0 pin and INT1 pin are also used as Ports P20 and P21, respectively.
Table 4
Pin description
Pin
Multifunction
Pin
Multifunction
Pin
Multifunction
Pin
Multifunction
C
CNTR1
P20
INT0
CNTR1
C
INT0
P20
D4
CNTR0
P21
INT1
CNTR0
D4
INT1
P21
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