參數(shù)資料
型號： UPD75208CW
廠商： NEC Corp.
英文描述： 4-BIT SINGLE-CHIP MICROCOMPUTER
中文描述： 4位單片機
文件頁數(shù)： 14/62頁
文件大?。?/td> 497K
代理商： UPD75208CW
14
μ
PD75208
5.
PERIPHERAL HARDWARE FUNCTIONS
5.1
PORTS
The
μ
PD75208 has the following three types of I/O port:
8 CMOS input ports
20 CMOS I/O ports
4 P-ch open-drain high-voltage, large-current output ports
Total: 32 ports
Table 5-1 Functions of Ports
Remarks
Port Name
Always read or test possible irrespective of the dual-function
pin operating mode.
Always read or test possible, P10 and P11 are inputs with the
noise eliminate function.
Can be set to the input or output mode in 4-bit units.
Ports 4 and 5 can input/output data in pairs in 8-bit units.
Ports 4 and 5 can directly drive LEDs.
Can be set bit-wise to the input or output mode. Port 6 can
incorporate a pull-down resistor as a mask option.
P-ch open-drain high-voltage, high-current output port. Can
drive an FIP and LED directly. Can incorporate a pull-down
resistor bit-wise as a mask option.
Shares the pins with SI, SO, SCK
and INT4.
Shares the pins with INT0 to 2
and TI0.
P23 shares the pin with BUZ.
Shares the pins with T10 to T13.
Operation and Feature
Function
4-bit input
PORT0
PORT1
PORT2
PORT4
PORT5
PORT3
PORT6
4-bit
input/output
PORTH
4-bit output
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