Commodore Plus 4, Руководство по обслуживанию

Страница: 12 / 26

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