Pin Configuration - Commodore PLUS 4 Service Manual

M1 SCHEMATIC ON PAGE11
PIN
CONFIGURATION
VSS 11
CSQ)
22
CS1 33
RES 44
RXC 55
XTL1 -- 66
XTLQ) -- 77
6551
88
RTS --
-- 99
CTS
TXD -- 10
DTR -- 11
RXD -- 12
RSQ)
--
13
14
RS1 --
U3-901895-02
ACIA
SYNERTEK ISYP6551A 12MHZ
PIN
CONFIGURATION
FE
-- 11
17 -- 22
16 --
33
-- 44
15
--
14 55
--
13 66
-- 77
12
I1
-- 88
IQ)
-- 99
F7 -- 10
F6 -- 11
12
F5 --
F4
-- 13
-- 14
GND
U19-251641-02
PLA
-R/W
28
-Q)2
27
26 -IRQ
-D7
25
-D6
24
-D5
23
-D4
22
-D3
21
-D2
20
-D1
19
-DQ)
18
17 -DSR
-DCD
16
-VCC
15
*The Baud Ratewith
CS
-VCC
28
LL
27 -18
26 -19
--
LL
Q)
25 -11
--
24 -111
23 -112
HH
22 -113
21 -114
LL
==
20 -1115
HH
==
19 -CE
XX
==
-FQ)
18
-F1
17
-F2
16
-F3
15
TRANSMIT/RECIEVE
CHARACTERTISTICS
TRANSMIT /RECEIVE
CLOCK RATE
TRANSMIT /RECEIVE
CLOCK HIGH TIME
TRANSMIT/RECEIVE
CLOCK LOW TIME
XTL TO TXD
11
PROPAGATION DELAY
RTS PROPAGATION
DELAY
IRQ PROPAGATION
DELAY (CLEAR)
External Clocking is:
BAUD RATE 11
16 x TCCY
00-07
R/W
DATA BUS
LL
TO PORT
PORT TO
HH
DATA BUS
XX ISOLATION
LOW LEVEL
HIGH LEVEL
IRREVELANT
II
MO~[
U5/U27-251640-03
SINGLE PORT
INTERFACE
CHARACTERISTICS
-02
SYM
MHZ
22
MAX
MIN
**
tCCY
400 --
tCH
--
175
tCL
--
175
too
-- 500
tDLY --
500
tlRQ
500
--
(tr, tf to
10
==
PIN
CONFIGURATION
R/W
--
11
PQ)
-- 22
P1 -- 33
P2 -- 44
P3 -- 55
6529
P4 --
66
P5 --
77
P6 --
88
P7
-- 99
--
VSS 10
II II
6529B 3MHz
UNIT
ns
ns
ns
ns
ns
ns
ns)
30
-VDD
20
19 -CS
-DBQ)
18
-DB1
17
-DB2
16
-DB3
15
-DB4
14
-DB5
13
-DB6
12
-DB7
11