UPD77111 NEC, UPD77111 Datasheet - Page 18

• Manufacturer Part Number: UPD77111
• Description: 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSORS
• Manufacturer: NEC

1.2 Connection of Unused Pins
1.2.1 Connection of Function Pins
18
INT1 - INT4
X/Y
DA0 - DA14
D0 - D15
MRD, MWR
HOLDRQ
BSTB, HOLDAK
SCK1, SCK2
SI1, SI2
SIEN1, SIEN2
SOEN1, SOEN2
SORQ1
SO1, SO2
SIAK1
HA0, HA1
HCS, HRD, HWR
HRE, HWE
HD0 - HD7
P0 - P3
TCK
TDO, TICE
TMS, TDI
TRST
CLKOUT
When mounting, connect unused pins as follows:
Notes 1. These pins may be left unconnected if the external data memory is not accessed in the program.
Pin
Note 1
2. These pins may be left unconnected if HCS, HRD, and HWR are fixed to the high level.
Note 2
However, connect these pins as recommended in the halt and stop modes when the power
consumption must be lowered.
However, connect these pins as recommended in the halt and stop modes when the power
consumption must be lowered.
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
I/O
I/O
I/O
I/O
Connect to EV
Leave unconnected.
Connect to EV
Leave unconnected.
Connect to EV
Leave unconnected.
Connect to EV
Connect to GND.
Leave unconnected.
Connect to EV
Connect to EV
Leave unconnected.
Connect to EV
Connect to GND via pull-down resistor.
Leave unconnected.
Leave unconnected. (internally pulled up).
Leave unconnected. (internally pulled down).
Leave unconnected.
Data Sheet U12801EJ4V0DS00
DD
DD
DD
DD
DD
DD
DD
.
.
.
via pull-up resistor, or connect to GND via pull-down resistor.
or GND.
or GND.
via pull-up resistor, or connect to GND via pull-down resistor.
Recommended Connection
PD77110, 77111, 77112