參數(shù)資料
型號(hào)： M37544G2SP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP32
封裝： 0.400 INCH, 1.78 MM PITCH, PLASTIC, SDIP-32
文件頁(yè)數(shù)： 11/70頁(yè)
文件大小： 645K
代理商： M37544G2SP
7544 Group
Rev.1.04
2004.06.08
page 17 of 66
REJ03B0012-0104Z
Fig. 17 Block diagram of ports (1)
(6)Port P12
Serial I/O clock output
Serial I/O mode selection bit
Serial I/O enable bit
Serial I/O synchronous
clock selection bit
Direction
register
Data bus
Port latch
Serial I/O clock input
P10, P12
input level
selection bit
*
(2)Ports P01,P02,P04–P07
Direction
register
Data bus
Port latch
Pull-up control
To key input interrupt
generating circuit
(1)Port P00
Direction
register
Data bus
Port latch
Pull-up control
To key input interrupt
generating circuit
CNTR1 interrupt input
(3)Port P03
Direction
register
Data bus
Port latch
Pull-up control
To key input interrupt
generating circuit
Timer output
P03/TXOUT
output valid
(5)Port P11
Data bus
Port latch
Serial I/O output
P11/TxD P-channel output disable bit
Direction
register
Serial I/O enable bit
Transmit enable bit
(4)Port P10
Direction
register
Data bus
Port latch
Serial I/O enable bit
Receive enable bit
Serial I/O input
P10, P12
input level
selection bit
*
*P10, P12, P34, and P37 input level are switched to the CMOS/TTL level by the port P1P3 control register.
When the TTL level is selected, there is no hysteresis characteristics.
P00 key-on wakeup
selection bit
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