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UPD784938 Datasheet(PDF) 54 Page - NEC

Part # UPD784938
Description  16-Bit Single-Chip Microcontrollers
Download  733 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD784938 Datasheet(HTML) 54 Page - NEC

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CHAPTER 2 PIN FUNCTIONS
54
Preliminary User’s Manual U13987EJ1V0UM00
(2) Non-port pins (2/2)
Pin Name
Input/Output
Alternate Function
Function
ASTB
Output
CLKOUT
Time division address (A0 to A7) latch timing output (during external memory access)
CLKOUT
Output
ASTB
Clock output
PWM0
Output
PWM output 0
PWM1
Output
PWM output 1
RX
Input
Data input (IEBus)
TX
Output
Data output (IEBus)
REGC
Connection of capacitor for regulator output stabilization/power supply when
regulator stops
REGOFF
Regulator operation specification signal
RESET
Input
Chip reset
X1
Input
System clock oscillation crystal connections
X2
(clock can also be input to X1)
XT1
Input
Watch clock connection
XT2
ANI0 to ANI7
Input
P70 to P77
A/D converter analog voltage inputs
AVREF1
A/D converter reference voltage application
AVDD
A/D converter positive power supply
AVSS
A/D converter GND
VDD
Positive power supply
VSS
GND
IC
Input
VPP
Internally connected. Connect directly to VSS (IC test pin).
VPP
IC
Flash memory programming mode setting.
High voltage application during program write/verify.
Connect directly to VSS in normal operating mode.


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