UPD78F4216A Datasheet, PDF (15/60 Pages) NEC – MOS INTEGRATED CIRCUIT

µPD78F4216A, 78F4218A, 78F4216AY, 78F4218AY
4.2 Non-Port Pins (2/2)
Pin Name
PCL
BUZ
RTP0 to RTP7
I/O
Output
Output
Output
Alternate Function
P23
P24
P120 to P127
AD0 to AD7
A0 to A7
A8 to A15
A16 to A19
RD
WR
WAIT
ASTB
EXA^Note
RESET
X1
X2
XT1
XT2
ANI0 to ANI7
ANO0, ANO1
AVREF0
AVREF1
AVDD
AVSS
VDD
VSS
VPP
I/O
Output
Output
Input
Output
P40 to P47
P80 to P87
P50 to P57
P60 to P63
P64
P65
P66
P67
Output
Input
Input
−
Input
−
Input
Output
−
P37
−
−
−
P10 to P17
P130, P131
−
Function
Clock output (for trimming main system clock and subsystem clock)
Buzzer output
Real-time output port that outputs data in synchronization with
trigger
Lower address/data bus for expanding memory externally
Lower address bus for expanding memory externally
Middle address bus for expanding memory externally
Higher address bus for expanding memory externally
Strobe signal output for reading from external memory
Strobe signal output for writing to external memory
Wait insertion at external memory access
Strobe output that externally latches address information output to
ports 4 through 6 and 8 to access external memory
Status signal output at external memory access
System reset input
Connecting crystal resonator for main system clock oscillation
Connecting crystal resonator for subsystem clock oscillation
A/D converter analog input
D/A converter analog output
A/D converter reference voltage input
D/A converter reference voltage input
A/D converter positive power supply. Connect to VDD.
GND for A/D converter and D/A converter. Connect to VSS.
Positive power supply
GND
Flash memory programming mode setting.
Applying high-voltage for program write/verify. Connect this pin to
VSS directly or via a pull-down resistor in normal operation mode.
Connect the VPP pin to VSS via a pull-down resistor in a system in
which the on-chip flash memory is written while mounted on the
target board. For the pull-down connection, it is recommended to
use a resistor with a resistance ranging from 470 Ω to 10 kΩ.
Note The EXA pin is available in the µPD78F4218A, 78F4218AY only.
Data Sheet U14125EJ1V0DS00
15