参数资料
型号: M38514E6SP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP42
封装: 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42
文件页数: 6/91页
文件大小: 1161K
代理商: M38514E6SP
Rev.1.01
Oct 15, 2003
page 14 of 89
3851 Group (Built-in 24 KB or more ROM)
Fig. 10 Port block diagram (1)
Port latch
(1) Port P00
(2) Port P01
P01/SOUT2 P-channel output disable bit
P02/SCLK2 P-channel output disable bit
Direction
register
Port latch
Direction
register
Port latch
Direction
register
Port latch
Direction
register
Direction
register
Port latch
Direction
register
Port latch
Direction
register
Port latch
Data bus
Serial I/O2 input
Serial I/O2 output
Serial I/O2 Transmit completion signal
Serial I/O2 port selection bit
(3) Port P02
Serial I/O2 synchronous
clock selection bit
Serial I/O2 port selection bit
Serial I/O2 clock output
Serial I/O2 external clock input
(4) Port P03
Serial I/O2 ready output
SRDY2 output enable bit
(5) Ports P04-P07,P1
(6) Port P20
Port XC switch bit
Oscillator
Port XC switch bit
Port P21
(7) Port P21
Port XC switch bit
Data bus
Sub-clock generating circuit input
(8) Port P22
I2C-BUS interface enable bit
SDA/SCL pin selection bit
SDA output
SDA input
Direction
register
Port latch
Data bus
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