Epson HX-20 - 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
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
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