參數(shù)資料
型號： μPD789112
廠商： NEC Corp.
英文描述： 8 Bit Single Chip Microcontrollers(8 位單片微控制器)
中文描述： 8位單片機微控制器（8位單片微控制器）
文件頁數(shù)： 15/48頁
文件大小： 221K
代理商： ΜPD789112
Preliminary Product Information
15
μ
PD789111, 789112, 789114
5. PERIPHERAL HARDWARE FUNCTIONS
5.1
Ports
The following three types of I/O ports are supported:
CMOS Input ports (port 6)
CMOS input/output ports (ports 0 to 2)
N-ch open-drain input/output ports (port 5)
Total
: 4 pins
: 12 pins
: 4 pins
: 20 pins
Table 5-1. Port Functions
Port name
Pin name
Description
Port 0
P00-P03
Input/output port. Each bit of the port can be separately specified as being for input or output.
A port used for input can be connected to an internal pull-up resistor by means of software
specification.
Port 1
P10, P11
Input/output port. Each bit of the port can be separately specified as being for input or output.
A port used for input can be connected to an internal pull-up resistor by means of software
specification.
Port 2
P20-P25
Input/output port. Each bit of the port can be separately specified as being for input or output.
A port used for input can be connected to an internal pull-up resistor by means of software
specification.
Port 5
P50-P53
N-channel open-drain input/output port. Each bit of the port can be separately specified as
being for input or output.
Whether the port itself is to contain a pull-up resistor is specified with a mask option.
Port 6
P60-P63
Input-only port
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