參數(shù)資料
型號： UPD77210
廠商： NEC Corp.
元件分類： 數(shù)字信號處理
英文描述： 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSOR
中文描述： 16位定點數(shù)字信號處理器
文件頁數(shù)： 21/74頁
文件大?。?/td> 467K
代理商： UPD77210
Data Sheet U15203EJ3V0DS
21
μ
PD77210, 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 EV
DD
via a pull-up resistor or to GND via a pull-down resistor.
HD0 to HD7
Note 1
I/O
Connect to EV
DD
via a pull-up resistor or to GND via a pull-down resistor.
HA0, HA1
Input
Connect to EV
DD
via a pull-up resistor or to GND via a pull-down resistor.
HCS, HRD, HWR
Input
Connect to EV
DD
via a pull-up resistor.
HRE, HWE
Output
Leave open.
TIMOUT
Output
Leave open.
ASCK, TSCK
Input
ASI, TSI
Input
Connect to EV
DD
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 EV
DD
via a pull-up resistor or to GND via a pull-down resistor.
MRD, MWR
Output
Leave open.
MHOLDRQ
Input
Connect to EV
DD
via a pull-up resistor.
MBSTB, MHOLDAK
Output
Leave open.
MWAIT
Input
Connect to EV
DD
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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