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[11]?
?
MPU?Interface?
?
For?detailed?timing?information,?see?datasheet:?http://www.newhavendisplay.com/app_notes/SSD1305.pdf?
?
?
6800‐MPU?Parallel?Interface?
The?parallel?interface?consists?of?8?bi‐directional?data?pins,?R/W,?D/C,?E,?and?/CS.?
A?LOW?on?R/W?indicates?write?operation,?and?HIGH?on?R/W?indicates?read?operation.?
A?LOW?on?D/C?indicates?“Command”?read?or?write,?and?HIGH?on?D/C?indicates?“Data”?read?or?write.?
The?E?input?serves?as?data?latch?signal,?while?/CS?is?LOW.?Data?is?latched?at?the?falling?edge?of?E?signal.?
?
Function?
E?
R/W
/CS
D/C
Write?Command?↓?0
0
0
Read?Status?↓?
1
0
0
Write?Data?↓?
0
0
1
Read?Data?↓?
1
0
1
?
?
?
?
8080‐MPU?Parallel?Interface?
The?parallel?interface?consists?of?8?bi‐directional?data?pins,?/RD,?/WR,?D/C,?and?/CS.?
A?LOW?on?D/C?indicates?“Command”?read?or?write,?and?HIGH?on?D/C?indicates?“Data”?read?or?write.?
A?rising?edge?of?/RS?input?serves?as?a?data?read?latch?signal?while?/CS?is?LOW.?
A?rising?edge?of?/WR?input?serves?as?a?data/command?write?latch?signal?while?/CS?is?LOW.?
?
Function?
/RD?
/WR
/CS
D/C
Write?Command?
1?↑
0
0
Read?Status?↑?
1
0
0
Write?Data?
1?
↑
0
1
Read?Data?↑?
1
0
1
?
Alternatively,?/RD?and?/WR?can?be?kept?stable?while?/CS?serves?as?the?data/command?latch?signal.?
Function?
/RD?
/WR
/CS
D/C
Write?Command?
1?
0
↑
0
Read?Status?
0?
1
↑
0
Write?Data?
1?
0
↑
1
Read?Data?
0?
1
↑
1
?
?
?
?
?
?
?
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