UPD78F9177 Datasheet, PDF (13/56 Pages) NEC – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78F9177, 78F9177Y
3.3 Pin I/O Circuits and Recommended Connection of Unused Pins
The input/output circuit type of each pin and recommended connection of unused pins is shown in Table 3-1.
For the input/output circuit configuration of each type, refer to Figure 3-1.
Table 3-1. Type of I/O Circuit for Each Pin and Connection of Unused Pins
Pin Name
I/O Circuit Type I/O
Recommended Connection of Unused Pins
P00 to P05
P10, P11
P20/SCK20/ASCK20
5-H
I/O Input: Independently connects to VDD0, VDD1 or VSS0, VSS1
via a resistor.
Output: Leave open.
8-C
P21/SO20/TxD20
P22/SI20/RxD20
P23/SCL0^Note1
P24/SDA0^Note1
13-X
Input: Independently connects to VDD0 or VDD1 via a
resistor.
Output: Leave open.
P25/TI80/SS20
P26/TO80
8-C
Input: Independently connects to VDD0, VDD1 or VSS0, VSS1
via a resistor.
Output: Leave open.
P30/INTP0/TI81/CPT90
P31/INTP1/TO81
P32/INTP2/TO90
Input: Independently connects to VSS0 or VSS1 via a
resistor.
Output: Leave open.
P33/INTP3/TO82/BZO90
P50 to P53
13-T
Input: Independently connects to VDD0 or VDD1 via a
resistor.
Output: Leave open.
P60/ANI0 to P67/ANI7
9-C
Input Connect directly to VDD0, VDD1 or VSS0, VSS1.
XT1
−
Input Connect to VSS0 or VSS1.
XT2
−
Leave open.
RESET
2
Input
−
VPP
IC0 ^Note2
IC2 ^Note1
−
−
Connect directly to VSS0 or VSS1.
Leave open.
Notes 1. The IC2, SCL0, and SDA0 pins are available in µPD78F9177Y product only.
2. 48-pin plastic TQFP (fine pitch) only.
Data Sheet U14022EJ1V0DS00
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