HP 13255 Technical Information page 28

FROM BACKPLANE ASSEMBLY SVS CLK
FROM INTERFACE CABLE ASSEMBL Y X161N
SO-S2
BO-B7.
B8-Bll CBE
r--~~j--:==~
I
~]I
=i,
I
I BAUD RATE GENERATOR
,14-+--. . . .
1
- - - - .
BAUD
1
RATE
BAUD
1
8 RATE
I
I
TRANSMIT RECEIVE
31
I
MULTIPLEXER
I
MULTIPLEXER...,'-1:I----~
4
2SB
PI. WLS. EPE 4
CONTROL
REGISTER
, SBS
8
t
---t;;~N~;:;
--
t------
~~I~/
~
eLK
l
eLK
~--Z-...L-.....,~.
DR
TO/FROM
INTERFACE CABLE ASSY
FROM BACKPLANE ASSY
ENCL ----~
CL +12 - .... ------1
Pia
CL+----~
CURRENT
TTYIN - - - - - . . . . LOOP (IN)
CL- --+------1
TNi----~
BB
- - - - - + I
CF - - - - - . ,
CB - - - - - - + I
SB
----+1
I S B - - - - + I
THE
TRANSMIT
HANDSHAKE
2
SB,CB
TRE
TRANSMIT CLK
ADDR2.A5DR3. -+-~~-------------------------------~
Ai5i5R4
ADi'5R9-ADDRll
170
WRITE
R EO ----:::--~
ADDR5,ADDR6
--~~~
RI 2
ORR. THRL
UAR/T
4 8
I ..
RDO-7
PE. DE.
DR,THRE
RECEIVE
r-2t--.
HANDSHAKE
TRO
RHE
r-
TRE,PE.OE.DR,THRE
2
BUSO-BUS6
a
0(]
I ....
1-----I~-4T
. . . . .
~
..
4---- BUSO-BUS7
2
BUSO-BUS6'
2
I
8
FCO-FC7
r~
8
..
I
5
3
D
PIa
CURRENT
LOOP
(OUT)
I
,-
FIRMWARE
CONTROL
WORD
D
STATUS
8
8
7
x80UT
x160UT
SA
CA
CD
BA
XECL
CLA
CLP
TO/FROM
BACKPLANE
ASSY
TO INTERFACE
CABLE ASSY
TO/FROM
INTERFACE
CABLE ASSV
A5DRO
~~-----~--------------------------------------------------------------------~
D
Fiqure 1
GP Asvnchronous
AUG-Ol-76
Data Comm Block Diagram
13255-91089