[5]?
?
I2C?Interface:??
Pin?No.?
Symbol?
External?
Connection?
Function?Description
1?
VSS?
Power?Supply?
Ground
2?
VDD?
Power?Supply?
Supply?Voltage?for?OLED?and?logic.
3?
NC?‐No?Connect
4?
SA0?
MPU?
Slave?Address?Selection?signal.
5‐6?
VSS?
Power?Supply?
Ground
7?
SCL?
MPU?
Serial?Clock?signal.
8?
SDAIN?
MPU?
Serial?Data?input?signal?(pins?8?and?9
can?be
tied?together).?
9?
SDAOUT?
MPU?
Serial?Data?output?signal?(pin9?can?be?no?connect).?
10‐14?
VSS?
Power?Supply?
Ground
15?
NC?‐No?Connect
16?
/RES?
MPU?
Active?LOW?Reset?signal.
17?
VSS?
Power?Supply?
Ground
18?
NC?‐No?Connect
19?
BS2?
MPU?
MPU?Interface?Select?signal.
20?
BS1?
MPU?
MPU?Interface?Select?signal.
?
?
?
?
MPU?Interface?Pin?Selections?
Pin?
Name?
6800?Parallel?
8‐bit?interface?
8080?Parallel?
8‐bit?interface?
Serial?
Interface?
I2C?
Interface?
BS2?
1?
1?
0?
0
BS1?
0?
1?
0?
1
?
?
MPU?Interface?Pin?Assignment?Summery?
Bus?
Interface?
Data/Command?Interface
Control?Signals
D7?
D6?
D5?
D4?
D3?
D2?
D1
D0
E
R/W
/CS
D/C
/RES?
8‐bit?6800?
D[7:0]?
E
R/W
/CS
D/C
/RES?
8‐bit?8080?
D[7:0]?
/RD
/WR
/CS
D/C
/RES?
SPI?
Tie?LOW?
NC?
SDIN
SCLK
Tie?LOW
/CS
D/C
/RES?
I2C?
Tie?LOW?
SDAIN?
SDAOUT
SCL
Tie?LOW
SA0
/RES?
?
?
?
?
?
?
?
?
?
?
?
?
?
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