Difference between revisions of "83Plus:Ports:12"

From WikiTI
Jump to: navigation, search
(Created page with '12 - LCD Command MirrorLCD Data 12 - LCD Command Mirror[[Category:83:Ports…')
 
 
(4 intermediate revisions by 3 users not shown)
Line 1: Line 1:
[[Category:83Plus:Ports:By Address|12 - LCD Command Mirror]][[Category:83Plus:Ports:By Name|LCD Data]]
+
[[Category:83Plus:Ports:By Address|12 - LCD Command Mirror]][[Category:83Plus:Ports:By Name|LCD Command Mirror]]
 
[[Category:83:Ports:By Address|12 - LCD Command Mirror]][[Category:83:Ports:By Name|LCD Command Mirror]]
 
[[Category:83:Ports:By Address|12 - LCD Command Mirror]][[Category:83:Ports:By Name|LCD Command Mirror]]
 
== Synopsis ==
 
== Synopsis ==
Line 6: Line 6:
 
'''Function:''' LCD Command port mirror
 
'''Function:''' LCD Command port mirror
  
I have no clue why, but this is a mirror of port 10h.
+
This asserts a second chip select line from the ASIC. I suspect the CS line may not be present on later pin-reduced chips. The mirror is still present on the TA1 ASIC.
  
  
 
== See Also ==
 
== See Also ==
 
* [[83Plus:Ports:10|Port 10]] - LCD command port
 
* [[83Plus:Ports:10|Port 10]] - LCD command port
* [http://wikiti.denglend.net/stuff/t6a04.pdf LCD driver datasheet]
+
* [https://archive.org/details/t6a04a-datasheet LCD driver datasheet]

Latest revision as of 16:41, 3 March 2020

Synopsis

Port Number: 12h

Function: LCD Command port mirror

This asserts a second chip select line from the ASIC. I suspect the CS line may not be present on later pin-reduced chips. The mirror is still present on the TA1 ASIC.


See Also