UPD77016 NEC, UPD77016 Datasheet - Page 14

• Manufacturer Part Number: UPD77016
• Description: 16 bits/ Fixed-point Digital Signal Processor
• Manufacturer: NEC

14
1.2 Recommended Connection for Unused Pins
Notes 1. Can leave open, if no access to external data memory is
Remark
INT1 - INT4
X/Y
DA0 - DA15
D0 - D15
MRD, MWR
WAIT
HOLDRQ
BSTB
HOLDAK
SCK1, SCK2
SI1, SI2
SOEN1, SOEN2
SIEN1, SIEN2
SORQ1, SORQ2
SO1, SO2
SIAK1, SIAK2
HA0, HA1
HCS
HRD, HWR
HRE, HWE
HD0 - HD7
P0 - P3
ID0 - ID31
IA0 - IA15
PWR
TCK
TDO, TICE
TMS, TDI
CLKOUT
2. Can leave open, if HCS, HRD, HWR are fixed to high level.
Pin
Note 1
executed in the whole of program.
But in the HALT mode when the current consumption is
reduced, connect a pin as recommended connection.
But in the HALT mode when the current consumption is
reduced, connect a pin as recommended connection.
I: Input pin, O: Output pin, I/O: Input/Output pin
Note 2
I/O
I/O
I/O
I/O
O
O
O
O
O
O
O
O
O
O
O
O
O
I/O
I
I
I
I
I
I
I
I
I
I
I
I
connect to V
open
connect to V
open
connect to V
open
connect to V
connect to GND
open
connect to V
connect to V
open
connect to V
open
connect to GND, via a resistor
open
open(pull-up internally)
open
Recommended connection
DD
DD
DD
DD
DD
DD
DD
or GND, via a resistor
or GND
or GND
or GND, via a resistor
PD77016