Example Of Protocol Using An Lcd Controller (Cop472-3) - Texas Instruments OMAP5912 Reference Manual

3.4

Example of Protocol Using an LCD Controller (COP472-3)

SPRU760B
2) Load the transmit data register (TDR) with:
1 0 1 A7 A6 A5 A4 A3 A2 A1 A0 x x x x x x: Don't care
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A7 ... A0: Address of the selected memory register
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3) Wait for the CSRB bit of the control and status register (CSR) to be reset.
4) Set the following fields of the control and status register (CSR):
NB_BITS_RD: 0
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NB_BITS_WR: 11 (decimal)
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INDEX: 00
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CS_CMD: 1
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START: 1
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5) Wait for the CSRB bit of the control and status register (CSR) to be reset.
6) Load the transmit data register (TDR) with:
D15 D14 ... D0
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D15 ... D0: Data
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7) Set the following fields of the control and status register (CSR):
NB_BITS_RD: 0
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NB_BITS_WR: 16 (decimal)
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INDEX: 00
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CS_CMD 1
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START: 1
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8) Wait for the CSRB bit of CSR to be reset.
9) Set the following fields of the control and status register (CSR):
INDEX: 00
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CS_CMD: 0
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START: 0
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Set up the interface by writing in setup 1 register (SR1) the following value:
CS_EDGE_RD = 1
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CS_EDGE_WR = 0
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CSCS_LVL = 0
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CS_FRQ = 10
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CS_CHK = 0
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This example describes a loading sequence to drive a four-digit display.
MicroWire Interface
Serial Interfaces 109