Input/Output Circuits And Connection Of Unused Pins - NEC uPD784038 Series User Manual

2.3 INPUT/OUTPUT CIRCUITS AND CONNECTION OF UNUSED PINS

Table 2-5 shows the input/output circuit types of the pins that have functions, and the connection method when that function
is not used.
Each input/output circuit type is shown in Figure 2-1.
Table 2-5 Pin Input/Output Circuit Types and Recommended Connection When Not Used (1/2)
Pin Name
P00 to P07
P10/PWM0
P11/PWM1
P12/ASCK2/SCK2
P13/RxD2/SI2
P14/TxD2/SO2
P15 to P17
P20/NMI
P21/INTP0
P22/INTP1
P23/INTP2/CI
P24/INTP3
P25/INTP4/ASCK/SCK1
P26/INTP5
P27/SI0
P30/RxD/SI1
P31/TxD/SO1
P32/SCK0/SCL
P33/SO0/SDA
P34/TO0 to P37/TO3
P40/AD0 to P47/AD7
P50/A8 to P57/A15
P60/A16 to ROM-less version
P63/A19
Mask ROM version
P64/RD
P65/WR
P66/WAIT/HLDRQ
P67/REFRQ/HLDAK
66
CHAPTER 2 PIN FUNCTIONS
Input/Output
Input/Output
Circuit Type
5-H Input/output
8-C
5-H
2 Input
2-C
8-C Input/output
2-C Input
5-H Input/output
10-B
5-H
4-B Output
5-H Input/output
User's Manual U11316EJ4V1UD
Recommended Connection
When Not Used
Input : Connect to V
DD0
Output : Leave open
Connect to V or V
DD0 SS0
Connect to V
DD0
Input : Connect to V
DD0
Output : Leave open
Connect to V
DD0
Input : Connect to V
DD0
Output : Leave open
Leave open
Input : Connect to V
DD0
Output : Leave open