Epson HX-20 Operation Manual page 72

Main CPU
Slave CPU
RAM
ROM
Expansion
ROM
External Expansion
RAM
ROM
Display
Printer
Clock
Speaker
Interface Power Capacity
(each pin and total)
VB (direct from battery)
+5V (switched)
VC (Power for RAM)
RS-232C
(Full and half duplex)
Connector
Input/ Output Level
Baud Rates
Pin Assignment
68
CMOS 8 bit 6301 microprocessor
614 KHz clock rate
CMOS 8 bit 6301 microprocessor,
614 KHz clock rate
16K standard
32K standard
8 K in option ROM for a
total of 40 K
16K (See "Options")
32K (See "Options")
Liquid Crystal Display; 120 x 32
dot-addressable matrix; 5 x 7 font;
virtual width to 255 characters by
BASIC WIDTH command
24-column dot matrix impact
microprinter; graphic print rate:
42 lines per minute; bit addressable
graphics; full ASCII upper and
lower case character set; cartridge
ribbon; plain paper, 55mm wide
Time and calendar, alarm, interval
timer, battery backup
Piezoelectric; programmable pulse
drive; four octaves with half-tones
1.0 A
50 mA
40 mA
8-Pin DIN
EIA RS-232C standard
110, 150, 300, 600, 1200, 2400,
4800
1: GND, 2: TXD, 3: RXD, 4:
RTS, 5: CTS, 6: DSR, 7: DTR,
8: CD; CG= Case Ground