參數(shù)資料
型號： UPD75068A
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)： 18/68頁
文件大小： 640K
代理商： UPD75068A
18
μ
PD75064, 75066, 75068, 75064(A), 75066(A), 75068(A)
5. PERIPHERAL HARDWARE FUNCTIONS
5.1 Ports
The following three types of I/O port are provided:
CMOS input ports (PORT0, 1, 11)
CMOS input/output ports (PORT2, 3, 6)
N-ch open-drain input/output ports (PORT4, 5) :
: 12
: 12
8
Total
32
Table 5-1. Functions of Port
Note
Can directly drive LEDs.
Port (Symbol)
PORT0
PORT1
PORT3
Note
PORT6
PORT2
PORT4
Note
PORT5
Note
PORT11
Function
4-bit input
4-bit I/O
4-bit I/O
(N-ch open-drain,
can withstand 10 V)
4-bit input
Operation/features
Can be read or tested regard-
less of the operation mode of
the dual function pin.
Can be specified for input/
output in bit units.
Can be specified for input/
output in 4-bit units.
Can be specified for input/
output in 4-bit units.
Ports 4 and 5 can be paired to
input/output data in 8-bit units.
4-bit port dedicated to input
Remarks
Shared with the SO/SB0, SI/SB1, SCK,
INT0-2, 4, and TI0 pins.
Port 6 is shared with pins KR0 to KR3 and
pins AN4 to AN7.
Port 2 is shared with PTO0, PCL, and BUZ
pins.
Whether or not the internal pull-up
resistor is provided can be specified for
each bit by mask option.
Port 11 is shared with pins AN0 to AN3.
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