STE2004S Datasheet, PDF (35/79 Pages) STMicroelectronics – 102 x 65 single-chip LCD controller/driver

STE2004S
Bus interfaces
Figure 36.. SDOUT is in high impedance in steady state and during data write. It is possible to
short circuit SDOUT and SDIN and read the I2C address or status byte without any additional
lines.
Figure 34. 4-lines serial bus protocol - one byte transmission
CS
D/C
SCLK
SDIN
MSB
LSB
LR0071
Figure 35. 4-lines serial bus protocol - several byte transmission
CS
D/C
SCLK
SDIN
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
DB7
DB6
DB5
LR0072
Figure 36. 4-lines serial bus protocol - I2C address or status byte read
CS
SCLK
SDIN
D/C
SDOUT
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 ^{Don't Don't Don't Don't Don't Don't Don't Don't}
Care Care Care Care Care Care Care Care
High-Z
High-Z
Command Write
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
ID Number
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
STATUS BYTE
DATA Read
High-Z
High-Z
LR00076
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