參數(shù)資料
型號: μPD789405
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): 26/128頁
文件大小: 607K
代理商: ΜPD789405
26
μ
PD789405, 789406, 789407
5.1.2 Port configuration
The hardware configuration of the ports is as follows.
Table 5-2. Port Configuration
Item
Configuration
Control register
Port mode register (PMm, where m = 0, 2, 4, 5, 8, or 9)
Pull-up resistor option register (PU0 to PU2)
Ports
Total: 43 (36 input/output and 7 input-only ports)
Pull-up resistors
Total: 36 (internal pull-up resistors can be used as specified by software, and whether a port itself is to
contain pull-up resistors can be specified with a mask option)
Figure 5-2. Basic Port Configuration
I
WR
PU
RD
WR
PORT
WR
PM
PU n
Output latch
(Pmn)
PMmn
V
DD
P-ch
Pmn
Caution
Figure 5-2 shows the basic configuration of the input/output ports. The configuration differs
depending on the functions assigned to the dual-function pins.
Remark
PU n : Bit n of a pull-up resistor option register (PU ), where = 0 to 2 and n = 0 to 7
PMmn: Bit n of port mode register m, where n = 0 to 7
Pmn
: Bit n of port m
RD
: Port read signal
WR
: Port write signal
相關PDF資料
PDF描述
μPD789407 8 Bit Single Chip Microcontrollers(8位單片微控制器)
μPD789406 8 Bit Single Chip Microcontrollers(8位單片微控制器)
μPD789417 8 Bit Single Chip Microcontrollers(8位單片微控制器)
μPD789415 8 Bit Single Chip Microcontrollers(8位單片微控制器)
μPD789416 8 Bit Single Chip Microcontrollers(8位單片微控制器)
相關代理商/技術參數(shù)
參數(shù)描述
PD78F0134 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers
PD78F0134(A) 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers
PD78F0134(A1) 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers
PD78F0134A 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers
PD78F0134A1 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers