參數(shù)資料
型號(hào)： UPD75048
廠商： NEC Corp.
英文描述： 4-BIT SINGLE-CHIP MICROCOMPUTER
中文描述： 4位單片機(jī)
文件頁(yè)數(shù)： 22/68頁(yè)
文件大?。?/td> 538K
代理商： UPD75048
22
μ
PD75048
6. PERIPHERAL HARDWARE FUNCTIONS
6.1
PORT
I/O ports are classified into the following three inds:
CMOS input (PORT0, 1, 11)
CMOS I/O (PORT2, 3, 6, 7, 8, 9)
N-ch open-drain I/O (PORT4, 5, 10) :
Total
:
:
12
24
12
48
Table 6-1 Port Function
Port (Symbol)
Function
Operation/Feature
Can be read or tested regardless
of the operation mode of the
shared pin.
Can be specified for input/output
in 1-bit units.
Can be specified for input/output
in 4-bit units. Ports 6 and 7 can
be paired to input/ output data
in 8-bit units.
Remarks
Also serves as the SO/SB0, SI/SB1,
SCK, INT0 to 2, INT4, and TI0 pins
4-bit input
PORT3*
PORT6
Port 6 can also serve as the KR0 to
KR3 pins.
Port 2 can also serve as the PTO0,
PPO, PCL, and BUZ pins.
PORT2
PORT7
4-bit input/output
Also serves as the KR4 to KR7 pins.
PORT4*
PORT5*
PORT10*
Can be specified for input/output
in 4-bit units. Ports 4 and 5 can
be paired to input/output data in
Whether or not the internal pull-up
resistor is provided can be specified
f
or each bit by mask option.
Port 10 can also serve as the MAR,
MAI, MAZ, and MAT pins.
4-bit input/output
(N-ch open-drain,
can sustain with 10V) 8-bit units.
PORT8
PORT9
PORT11
4-bit input/output
Can be specified for input/output
in 4-bit units.
4-bit input-only port.
4-bit input
Port 11 can also serve as the
AN0 to AN3 pins.
*: Can directly drive LED.
PORT0
PORT1
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