Commodore Plus 4 - Pin Configuration

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