參數(shù)資料
型號： UPD78323
廠商： NEC Corp.
英文描述： 16/8-BIT SINGLE-CHIP MICROCONTROLLER
中文描述： 16/8-BIT單片機(jī)
文件頁數(shù)： 31/86頁
文件大小： 454K
代理商： UPD78323
31
μ
PD78323, 78324
3.5
PORT FUNCTIONS
Table 3-1 lists the digital input/output ports.
Each port can carry out many control operations including 8 and other bit data input/output operations.
Table 3-1. Port Functions and Features
Port Name
Function
Feature
Remarks
Specifiable bit-wise for input/output.
Also specifiable for realtime output port.
Serves as RTP0 to RTP7
and pins.
Serves as NMI, INTP0 to
INTP5, INTP6/TI and pins.
Serves as T
X
D, R
X
D,
SO/SB0, SI/SB1, SCK and
pins.
Port 3
5-bit input/output
Specifiable bit-wise for port pins or control pins.
Specifiable in 8-bit units for input or output.
Functions as the multiplexed address/data bus (AD0 to
AD7) in the external memory expansion mode.
Port 4
8-bit input/output
––––––––
Specifiable bit-wise for input or output.
Functions as the address bus (A8 to A15) in the external
memory expansion mode.
Pins which are not used as the address bus can be used
as a port.
Port 5
8-bit input/output
––––––––
Input port pin. Also functions as analog input to the
A/D converter.
Serves as AN0 to AN7
and pins.
Functions as TO00 to
TO03, TO10 to TO11 and
pins.
Port 8
6-bit input/output
Specifiable bit-wise for the port pin or control pin.
Specifiable bit-wise for input/output.
P90 and P91 function as RD output and WR output,
respectively, in the external memory expansion mode.
P92 and P93 function as TAS output and TMD output,
respectively, in the high-speed fetch mode.
Port 9
4-bit input/output
––––––––
Port 2
8-bit input
Input port pin. Functions as an external interrupt input.
Port 7
8-bit input
Port 0
8-bit input/outpput
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