UPD784907 Datasheet, PDF (19/98 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER

µPD784907, 784908
Table 6-1. Types of Pin I/O Circuits and Recommended Connections of Unused Pins (2/2)
Pin Name
RESET
TEST
XT2
XT1
PWM0, PWM1
RX
TX
AVREF1
AVSS
AVDD
I/O Circuit Type
2
1
—
—
3
1
3
—
I/O
Input
—
Input
Output
Input
Output
—
Recommended Connections of Unused Pins
—
Connect directly to VSS
Leave open
Connect to VSS
Leave open
Connect to VDD or VSS
Leave open
Connect to VSS
Connect to VDD
Caution
Connect an I/O pin, whose input/output mode is undefined, to VDD via a resistor of several
10 kΩ (especially if the voltage on the reset input pin rises higher than the low level input at power
on or when the mode is being switched between input and output by software).
Remark Since type numbers are commonly used in the 78K Series, these numbers are not always serial in each
product (some circuits are not included).
Data Sheet U11680EJ2V0DS00
19