NEC PD78214 - Manual (Page 55)

26
µ
PD78214 Sub-Series
(2) Pins other than those which function as ports
TO0-TO3
CI
RxD
TxD
ASCK
SB0
SI
SO
SCK
NMI
INTP0
INTP1
INTP2
INTP3
INTP4
INTP5
AD0-AD7
A8-A15
A16-A19
RD
WR
WAIT
ASTB
REFRQ
RESET
X1
X2
AN0-AN5
AN6, AN7
AV
REF
AV
SS
V
DD
V
SS
NC
P34-P37
P23/INTP2
P30
P31
P25/INTP4
P33/SO
P27
P33/SB0
P32
P20
P21
P22
P23/CI
P24
P25/ASCK
P26
P40-P47 Note
P50-P57 Note
P60-P63
P64 Note
P65 Note
P66/AN6
—
P67/AN7
—
P70-P75
P66/WAIT,
P67/REFRQ
Output
Input
Input
Output
Input
Input/output
Input
Output
Input/output
Input/output
Output
Output
Output
Output
Input
Output
Output
Input
Input
—
Input
Timer output
Count clock supplied to eight-bit timer/counter unit 2
Serial data input (UART)
Serial data output (UART)
Baud rate clock input (UART)
Serial data input/output (SB2)
Serial data input (three-wire serial I/O)
Serial data output (three-wire serial I/O)
Serial clock input/output (SBI, three-wire serial I/O)
Time-multiplexed address/data bus (external memory connected)
High-order address bus (external memory connected)
High-order address when the addresses are expanded (external memory connected)
Read strobe to external memory
Write strobe to external memory
Wait insertion
Latch timing for addresses A0 to A7 (when external memory is accessed)
Refresh pulse to external pseudo-static memory
Chip reset
Connected to the crystal oscillator used for the system clock (a clock
signal can be input to X1)
Designating ROM-less operation (access to the external memory
mapped to the same area as the internal ROM). Set this pin to low for
the µPD78213, or to high for the µPD78212 and µPD78214.
A/D converter reference voltage
A/D converter ground
Main power
Ground
—
—
— —
—
External interrupt requests
Analog voltage input for A/D converter Input
Pin name for
secondary function
Pin Function Input/output
Note These pins do not function as ports in the case of the µPD78213.
Input EA