Radio Shack 26-3801 - Page 8

(f)
LSIs
CPU . .
. 80C35
(OKi)
Code
and
pin
compatible
with
8085
ROM
. . .
Max.
64 KB
(2 Banks
of
32 KB)
STANDARD
32
KB
OPTION
32
KB
RAM
.
. .
Max.
32 KB
STANDARD
8
KB
(four
TC5518BF
(TOSHIBA))
RAM
PACK
incremental
8
KB RAM
PACK
on PWB
CLOCK/CALENDAR
.
. .
yPD
1990AC
(NEC)
No
leap
year /No
February
2
9
(2)
I/O Interface
(a) RS-232C
Conforms
to
EIA
standards
Signal
. . .
TXR
(Transmit
Data)
RXR
(Receive
Data)
RTSR
(Request
To
Send)
CTSR
(Clear
To
Send)
DSRR
(Data
Set
Ready)
DTRR
(Data
Terminal
Ready)
Programmable
Items
*
Data
Length
. .
.
6,
7
or
8 bits
*
Parity
NON,
EVEN
or ODD
*
Stop
Bit
Length
.
. 1
or 2
bits
*
Baud
Rate
....
75,
110,
300,
600,
1200,
2400,4800,
9600,
19200
BPS
Maximum
Transmission
Distance
... 5m
Driver
maximum
voltage
output
Driver
minimum
voltage
output
Receiver
maximum
voltage
input
Receiver
minimum
voltage
input
±5V
±3.5V
±18V
±3V