lm4312 National Semiconductor Corporation, lm4312 Datasheet - Page 13

• Manufacturer Part Number: lm4312
• Description: Mobile Pixel Link Two Mpl-2 , Rgb Display Differential Interface Serializer With Optional Dithering And Look Up Table
• Manufacturer: National Semiconductor Corporation

Note 13: If a WRITE is done to a reserved bits, data should be all 0’s. If a READ is done to a reserved location, either 1’s or 0’s may be returned. Mask reserved
data bits.
Note 14: This register must be unlocked first through bit 4 of register 0. This register is currently a write only register, read is not supported.
Note 15: DO NOT write to Reserved Registers.
SPI RESET BIT
Configuration 3 register, bit 1 is a device RESET function.
When this bit is set to a 1, the device is placed into reset.
SPI Timing
Figures 14, 15, 16 show a 3–wire SPI Interface with the (LM4312) SPI_DI and (LM4312) SPI_DO pins tied together to form a bi-
directional SPI data signal SDA. In the 16–bit READ, the SPI HOST drives the first 8 bits of the operation, and the SPI target
(LM4312) drives the last 8 bits as shown in Figure 15.
FIGURE 14. 16-bit SPI WRITE
FIGURE 15. 16-bit SPI READ
FIGURE 16. SPI Page Write
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When this bit is a 0, the device is in normal mode and is con-
trolled by the PCLK and PD* signal pins.
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