UPD784938 Datasheet, PDF (54/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

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