[4]?
?
Pin?Description?
?
J1:?
Pin?No.?
Symbol?
External?
Connection?
Function?Description
1?
RX?
MPU?
RS‐232
(TTL)
Serial?input?port
2?
VSS?
Power?Supply?
Ground
3?
VDD??Power?Supply?
Power?supply?for?logic?(+5.0V)
?
J2:?
Pin?No.?
Symbol?
External?
Connection?
Function?Description
1?
SPISS?
MPU?
SPI?Slave?Select?(NC?in?I2C?mode)
2?
SDO?
NC?
No?Connect
3?
SCK/SCL?
MPU?
Serial?Clock
4?
SDI/SDA?
MPU?
Serial?Data?In?(SPI)?/?Serial?Data?(I2C)
5?
VSS?
Power?Supply?
Ground
6?
VDD?
Power?Supply?
Power?Supply?for?logic?(+5.0V)
?
Recommended?LCD?connector:?2.54mm?pitch?pins?on?P1?or?P2?
Backlight?connector:?controlled?by?command???Mates?with:??‐?
?
?
Jumper?Communication?Selection?
R1?
R2?
Protocol?
Description
Short?
Short?
TEST?
Self‐test?
Open?
Short?
SPI?
100KHz?max?clock
Short?
Open?
I2C?
100KHz?max?clock
Open?
Open?
RS‐232?
5V,?TTL?signal
?
?
?
相关PDF资料
NHD-0420D3Z-NSW-BBW-V3 LCD SERIAL 4X20 SIDE WHT BKLT
NHD-0420DZ-FL-GBW LCD MOD CHAR 4X20 Y/G TRANSFL
NHD-0420DZ-FL-YBW-33V3 LCD MOD CHAR 4X20 Y/G TRANSF STN
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