µPD70208H, 70216H
1.2 PROCESSING OF UNUSED PINS
Table 1-1 shows the processing (recommended connection) of the unused pins. Use of a resistor with a resistance of
1 to 10 kΩ is recommended to connect these pins to VDD or GND via resistor.
Table 1-1. Processing of Unused Pins
Pin Name
AD0 to AD15Note 1
AD0 to AD7Note 2
A8 to A15Note 2
A16/PS0 to A19/PS3
REFRQ
HLDRQ
HLDAK
RESOUT
READY
NMI
MRD
MWR
IORD
IOWR
ASTB
UBENote 1
HighNote 2
BUSLOCK
POLL
BUFR/W
BUFEN
CLKOUT
BS0 to BS2
QS0, QS1
TOUT2
TCTL2
TCLK
INTP1 to INTP7
INTAK/SRDY/TOUT1
DMAAK3/TxD
DMARQ3/RxD
DMAAK0 to DMAAK2
DMARQ0 to DMARQ2
END/TC
Input/Output
3-state I/O
3-state I/O
3-state output
3-state output
Output
Input
Output
Output
Input
Input
3-state output
3-state output
3-state output
3-state output
Output
3-state output
Output
3-state output
Input
3-state output
3-state output
Output
3-state output
Output
Output
Input
Input
Input
Output
Output
Input
Output
Input
I/O
Open
Recommended Connection
Connect to GND via resistor
Open
Open
Connect to VDD via resistor
Connect to GND via resistor
Open
Connect to GND via resistor
Open
Open
Connect to GND via resistor
Open
Connect to GND via resistor
Open
Connect to GND via resistor
Individually connect to VDD via resistor
Notes 1. V50HL only
2. V40HL only
Data Sheet U13225EJ4V0DS00
17