参数资料
型号: m789436
厂商: NEC Corp.
元件分类: 8位微控制器
英文描述: 8-Bit Single-Chip Microcontrollers
中文描述: 8位单芯片微控制器
文件页数: 84/144页
文件大小: 1378K
代理商: M789436
CHAPTER 2 PIN FUNCTIONS
44
User’s Manual U15075EJ1V0UM00
2.3 Pin Input/Output Circuits and Recommended Connection of Unused Pins
The input/output circuit type of each pin and recommended connection of unused pins are shown in Table 2-1.
For the input/output circuit configuration of each type, see Figure 2-1.
Table 2-1. Types of Pin Input/Output Circuits
Pin Name
I/O Circuit
Type
I/O
Recommended Connection of Unused Pins
P00/KR0 to P03/KR3
8-A
P10, P11
5-A
P20
P21/BZO90
P22/SS20
P23/SCK20/ASCK20
P24/SO20/TxD20
P25/SI20/RxD20
P26/TO90
Input:
Independently connect to VDD or VSS via a resistor.
Output: Leave open.
P30/INPT0/CPT90
P31/INPT1/TO50/TMI60
P32/INPT2/TO60
P33/INPT3/TO61
8-A
Input:
Independently connect to VSS via a resistor.
Output: Leave open.
P50 to P53
(Mask ROM version)
13-W
P50 to P53
(Flash memory version)
13-V
I/O
Input:
Independently connect to VDD via a resistor.
Output: Leave open.
P60/ANI0 to P65/ANI5
9-C
Input
Connect directly to VDD or VSS.
P70 to P72
P80, P81
Note 1
P90 to P97
Note 1
5-A
I/O
Input:
Independently connect to VDD or VSS via a resistor.
Output: Leave open.
S0 to S4
Note 1
S0 to S14
Note 2
17
Output
COM0 to COM3
18
VLC0 to VLC2
CAPH, CAPL
Leave open.
XT1
Input
Connect to VSS.
XT2
Leave open.
AVSS
Connect to VSS.
AVDD
Connect to VDD.
RESET
2
Input
IC
VPP
Connect directly to VSS.
Notes 1. When using the
PD789426 and 789436 Subseries
2. When using the
PD789446 and 789456 Subseries
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