NEC PD78P214 Manuale Utente
16
µ
PD78214 Sub-Series
1.4 EXAMPLE APPLICATION SYSTEM (PRINTER)
M
P00-P03
M
P04-P07
TO
SCK
SO
T
X
D
R
X
D
Ports
AV
REF
AV
SS
AN0
AN1
AN2-AN7
Temperature sensor
Motor supply voltage
SW input for each mode
RESET
X1
X2
V
SS
V
DD
A8-A15
ASTB
AD0-AD7
REFRQ
WR
RD
A16-A19
PD78214
µ
Decoder
Latch
Data bus
Address bus
Gate array
I/O expansion
Centronics interface, etc.
PROM
PD27C256A
µ
Pseudo SRAM
PD24C1000
µ
Kanji character
generator
Print head driver
Shift register
RS-232C
driver
Stepping motor
Carriage motor
Paper feed motor