MPS6545-1 Datasheet PDF - Commodore

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MPS6545-1
Commodore

Part Number MPS6545-1
Description CRT Controller
Page 12 Pages


MPS6545-1 datasheet pdf
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,..,commodore
~ aernlcanductoor group
~UYAJ@@
MPS
6545-1
CRT
CONTROLLER
(CRTC)
6545-1 CRT Controller (CRTC)
CONCEPT
The 6545-1 is a CRT Controller intended to provide capability for interfacing the 6500/6800
microprocessor families to CRT or TV-type raster scan displays. A unique feature is the inclusion of
several modes of operation, so that the system designer can configure the system with a wide
assortment of techniques.
FEATURES:
• Single +5 volt (±5%) power supply.
• Alphanumeric and limited graphics
capabi Iities.
• Fully programmable display (rows, columns,
blanking, etc.).
• Non-interlaced scan.
.50/60 Hz operation.
• Fully programmable cursor.
• External light pen capability.
• Capable of addressing up to 16K character
video display RAM.
• No DMA required.
• Pin-compatible with MC6845.
• Row/Column or straight-binary addressing
for video display RAM.
• Internal 8-bit status register.
I
ORDERING INFORMATION
MXS 6545-1 1 MHz
MXS 6545A-1 2 MHz
- - - - PACKAGE DESIGNATOR
C = CERAMIC
P = PLASTIC
6545-1 PIN DESIGNATION
GNO
RES
LPEN
CCO/MAO
CC1/MAl
CC2/MA2
CC3/MA3
CC4/MA4
CC5/MA5
CC6/MA6
CC7/MA7
CRO/MA8
CR1/MA9
CR2/MA10
CR3/MA11
CR4/MA12
CR5/MA13
DISPLAY ENA8LE
CURSOR
VCC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40 VSYNC
39 HSYNC
38 RAO
37 RAl
36 RA2
35 RA3
34 RA4
33 080
32 081
31 082
30 083
29 084
28 085
27 086
26 087
25 CS
24 RS
23 !1\2
22 R/w
21 CCLK
2-117



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MoPS
6545-1
MAXIMUM RATINGS
Supply Voltage, VCC
InpuVOutput Voltage, VIN
Operating Temperature, TOp
Storage Temperature, TSTG
-0.3V to +7.0V
-0.3V to + 7.0V
O°C to 70°C
-SsoC to 1S0°C
All inputs contain protection circuitry to prevent damage due
to high static discharges. Care should be exercised to
prevent unnecessary application of voltages in excess of the
allowable limits.
COMMENT
Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device.
These are stress ratings only. Functional operation of this
device at these or any other conditions above those indi-
cated in the operational sections of this specification is not
implied and exposure to absolute maximum rating condi-
tions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS (Vee = 5.aV ± 5%, TA = a to 7aoe, unless otherwise noted)
Symbol
Characteristic
Min.
Max.
Unit
VIH Input High Voltage
2.0 VCC
V
VIL Input Low Voltage
-0.3
0.8
V
liN Input Leakage (~2, R/w, RES, CS, RS, LPEN, CCLK)
2.S fJA
ITSI Three-State Input Leakage (DBO-DB 7)
VIN = 0.4 to 2.4V
10.0 J-lA
VOH
Output High Voltage
ILOAD = 20Sf-}A (DBO-DB7)
ILOAD = 1OOfJA (all others)
2.4 Vee
V
VOL Output Low Voltage
ILOAD = 1.6mA
VSS 0.4
V
Po Power Dissipation
1000
mW
CIN
Input Capacitanc~
!1!2, R/w, RES, es, RS, LPEN, CeLK
DBO-DB7
10.0 pF
12.S pF
COUT
Output Capacitance
10.0 pF
INTERFACE DIAGRAM
MPU 1/F
DBO-DB?
<1>2
R/w
CS
RS
VCC
GND
II
r--....I--~---.
r
-
-
-
-
l....
HSYNC
VSYNC
6545-1 CRTC
I-------,~ DISPLAY ENABLE
r-----'~ CURSOR
~--- LPEN
1 + - - - - CCLK
~A~A13 RA~Aj
RES
REFRESH RAM AND CHARACTER ROM
2-118



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MPU BUS INTERFACE CHARACTERISTICS
WRITE CYCLE
MPS
6545-1
CS,RS
DATA BUS
I
WRITE TIMING CHARACTERISTICS
(Vee = 5,OV ± 5%, TA = a to 70oe, unless otherwise noted)
Symbol Characteristic
tCYC
Cycle Time
tc ¢2 Pulse Width
tACW
Address Set-Up Time
tCAH
Address Hold Time
twcw
tCWH
R;W Set-Up Time
-
RNJ Hold Time
tDCW
tHW
Data Bus Set-Up Time
Data Bus Hold Time
(tr and tf = 10 to 30 ns)
6545-1
Min.
Max.
1.0 40
470 -
180 -
0-
180 -
0-
265 -
10 -
6545A-1
Min.
Max.
0,5 40
235 -
90 -
0-
90 -
0-
100 -
10 -
Unit
!Js
ns
ns
ns
ns
ns
ns
ns
2-119



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MPU BUS INTERFACE CHARACTERISTICS
READ CYCLE
MPS
6545-1
CS, RS
R/W
DATA BUS
~tWCR
------
tCDR ~
tCDA -:---
tHR~_
READ TIMING CHARACTERISTICS
Nee = 5.0V ± 5%, TA = a to 70°C, unless otherwise noted)
6545-1
Symbol Characteristic
Min.
Max.
tCYC
Cycle Time
1.0 40
tc ¢2 Pulse Width
470 -
tACR
Address Set-Up Time
180 -
teAR
Address Hold Time
0-
twCR
R/wSet-Up Time
180 -
tCDR
Read Access Time
- 340
tHR Read Hold Time
10 -
tCDA
Data Bus Active Time (Invalid Data)
(tr and tf = 10 to 30 nsj
40 -
6545A-1
Min.
Max.
0.5 40
235 -
90 -
0-
90 -
- 150
10 -
40 -
Unit
I-lS
ns
ns
ns
ns
ns
ns
ns
2-120



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Commodore
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