PacComm TINY-2 - Page 134

HARDWARE
DESCRIPTION
.
Modem
Disconnect
-
JS
Pin
12
Transmitter
Clock
(16x)
Output
This
pinis
tied
to
the
radio
baud
rate
switch
network.
It
provides
a
clock
at
16
times
the
desired
radio
port
data
rate.
This
pin
is
normally
jumpered
to
pin
11
when
the
on-board
modem
is
used.
Pin
13
Receive
Clock
Input
This
pin
is
tied
to
the
SIO
receive
clock
input
pin.
It
expects
2
clock
at
the
desired
data
rate
(1200
Hz
for
1200
bauds),
of
the
proper
phase
relationship
to
the
received
data.
This
pin
is
normally
jumpered
to
pin
14
when
the
on-board
modem
is
used.
Pin
14
Receive
Clock
Output
This
pin
is
the
received
data
clock
signal
derived
fromthe
NRZI-to-NRZ
converter.
This
pin
is
normally
jumpered
to
pin
13
when
the
on-board
modem
is
used.
Pin
15
TINY-2/MICRO-2
Ground
Reference
This
pin
ties
to
the
TINY-2/MICRO-2
digital
ground
at
the
Slo.
Pin
16
Additional
Ground
Reference
Pini7
Receive
Data
Input
This
pin
is
the
received
data
input
to
the
NRZI-to-NRZ
converter.
This
pin
is
normally
jumpered
to
pin
18
when
the
on-board
modem
is
used.
Pin
18
Receive
Data
Output
This
pin
provides
receive
data
from
the
on-board
modem.
This
pin
is
normaily
jumpered
to
pin
17
when
the
on-board
modem
is
used.
Pin
19
Transmit
Data
Output
This
tine
is
the
SIO
data
output.
This
pin
is
normally
jumpered
to
pin
20
when
the
on-board
modem
is
used.
Pin
20
Transmit
Data
Input
This
input
line
accepts
data
to
be
be
transmitted
by
the
modem.
This
pin
is
normaily
jumpered
to
pin
19
when
the
on-board
modem
is
used.
ir
TINY-2/MICRO-2
Technical
Ref.,
2
Ed
©
1989,
PacComm,
Inc.
13