6845: Difference between revisions
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''' | '''CRT Controller (CRTC)''' | ||
=Pinout= | =Pinout= | ||
| Line 5: | Line 5: | ||
DIP40 | DIP40 | ||
+---\/---+ | +---\/---+ | ||
Vss | 1 40| VSYNC | |||
* | *RESET | 2 39| HSYNC | ||
LPSTB | 3 38| RA0 | |||
MA0 | 4 37| RA1 | |||
MA1 | 5 36| RA2 | |||
MA2 | 6 35| RA3 | |||
MA3 | 7 34| RA4 | |||
MA4 | 8 33| D0 | |||
MA5 | 9 32| D1 | |||
MA6 |10 31| D2 | |||
MA7 |11 30| D3 | |||
MA8 |12 29| D4 | |||
MA9 |13 28| D5 | |||
MA10 |14 27| D6 | |||
MA11 |15 26| D7 | |||
MA12 |16 25| *CS | |||
MA13 |17 24| RS | |||
Dspl En |18 23| E | |||
CURSOR |19 22| R/*W | |||
Vcc |20 21| CLK | |||
+--------+ | |||
</pre> | </pre> | ||
=Frequency= | =Frequency= | ||
Set reader to FREQ, put black probe to GND, red probe to 21 to measure CPU clock, to 39 for HSYNC and to 40 for VSYNC<BR> | |||
=External links= | =External links= | ||
Revision as of 16:02, 28 September 2009
CRT Controller (CRTC)
Pinout
DIP40
+---\/---+
Vss | 1 40| VSYNC
*RESET | 2 39| HSYNC
LPSTB | 3 38| RA0
MA0 | 4 37| RA1
MA1 | 5 36| RA2
MA2 | 6 35| RA3
MA3 | 7 34| RA4
MA4 | 8 33| D0
MA5 | 9 32| D1
MA6 |10 31| D2
MA7 |11 30| D3
MA8 |12 29| D4
MA9 |13 28| D5
MA10 |14 27| D6
MA11 |15 26| D7
MA12 |16 25| *CS
MA13 |17 24| RS
Dspl En |18 23| E
CURSOR |19 22| R/*W
Vcc |20 21| CLK
+--------+
Frequency
Set reader to FREQ, put black probe to GND, red probe to 21 to measure CPU clock, to 39 for HSYNC and to 40 for VSYNC
External links
"6809 support chips" page on CPU-World
Files
-
MC6845 Datasheet
