参数资料
型号: M38004E8SS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CDIP64
封装: 0.750 INCH, 1.78 MM PITCH, WINDOWED, CERAMIC, SDIP-64
文件页数: 101/174页
文件大小: 1752K
代理商: M38004E8SS
HARDWARE
1-17
3800 GROUP USER’S MANUAL
Fig. 12 Port block diagram (single-chip mode)
FUNCTIONAL DESCRIPTION
(1) Ports P0, P1, P2, P3, P40, P41, P56, P57, P6, P7
Direction register
Data bus
Port latch
(2) Ports P42, P43, P50 – P53
Direction register
Data bus
Port latch
Interrupt input
(3) Port P44
Direction register
Data bus
Port latch
Serial I/O input
Serial I/O enable bit
Receive enable bit
(4) Port P45
Direction register
Data bus
Port latch
Serial I/O output
Serial I/O enable bit
Transmit enable bit
P45/TXD P-channel output disable bit
(5) Port P46
Direction register
Data bus
Port latch
Serial I/O clock output
Serial I/O mode selection bit
Serial I/O enable bit
Serial I/O
synchronous clock selection bit
Serial I/O
external
clock input
(6) Port P47
Direction register
Data bus
Port latch
Serial I/O ready output
Serial I/O enable bit
SRDY output enable bit
Serial I/O mode selection bit
(7) Ports P54, P55
Direction register
Data bus
Port latch
Pulse output mode
Timer output
Counter input
Interrupt input
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