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UPD77210 Datasheet(PDF) 21 Page - NEC

Part # UPD77210
Description  16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSOR
PDF  74 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD77210 Datasheet(HTML) 21 Page - NEC

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Data Sheet U15203EJ3V0DS
21
µµµµPD77210, 77213
1.2 Connection of Unused Pins
1.2.1 Connection of functional pins
Connect the unused pins as shown in the table below.
Pin Name
I/O
Recommended Connection
STOPS, HALTS
Output
Leave open.
CSTOP
Input
Connect to GND via a pull-down resistor.
CLKOUT
Output
Leave open.
P0 to P15
I/O
Connect to EVDD via a pull-up resistor or to GND via a pull-down resistor.
HD0 to HD7
Note 1
I/O
Connect to EVDD via a pull-up resistor or to GND via a pull-down resistor.
HA0, HA1
Input
Connect to EVDD via a pull-up resistor or to GND via a pull-down resistor.
HCS, HRD, HWR
Input
Connect to EVDD via a pull-up resistor.
HRE, HWE
Output
Leave open.
TIMOUT
Output
Leave open.
ASCK, TSCK
Input
ASI, TSI
Input
Connect to EVDD via a pull-up resistor or to GND via a pull-down resistor.
ASIEN, TSIEN
Input
ASOEN, TSOEN,
LRCLK
Input
Connect to GND via a pull-down resistor.
ASO, TSO
Output
TSORQ
Output
TSIAK
Output
Leave open.
MA0 to MA19
Output
Leave open.
MD0 to MD15
Note 2
I/O
Connect to EVDD via a pull-up resistor or to GND via a pull-down resistor.
MRD, MWR
Output
Leave open.
MHOLDRQ
Input
Connect to EVDD via a pull-up resistor.
MBSTB, MHOLDAK
Output
Leave open.
MWAIT
Input
Connect to EVDD via a pull-up resistor.
TCK
Input
Connect to GND via a pull-down resistor.
TDO, TICE
Output
Leave open.
TMS, TDI
Input
Leave open (this pin is internally pulled up).
TRST
Input
Leave open (this pin is internally pulled down).
Notes 1. These pins
may
left opened if the
HCS,
HRD,and
HWR
are
fixed
to
the
high
level.
However, connect these pins as recommended in the HALT and STOP modes when the power
consumption must be lowered.
2. These pins may leave opened if the external data memory is not accessed in the program.
However, connect these pins as recommended in the HALT and STOP modes when the power
consumption must be lowered.
Caution Unused alternate-function pins should be handled in accordance with the processing specified
for the pin function of the initial setting.



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