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L6254 датащи(PDF) 8 Page - STMicroelectronics |
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L6254 датащи(HTML) 8 Page - STMicroelectronics |
8 / 17 page SERIAL PORT OPERATION The serial port interface is a bi-directional port for reading and writing programming data from/to the in- ternal registers of this device. For data transfers SDEN* is brought high, serial data is presented at the SDATA pin, and a serial clock is applied to the SCLK pin. After the SDEN* goes high , the first 16 pulses applied to the SCLK pin will shift the data presented at the SDATA pin into an internal shift register on the rising edge of each clock. An internal counter prevents more than 16 bits from being shifted into the register. The data in the shift register is latched after the 16th SCLK pulse. If less than 16 clock pulses are provided before SDEN* goes low, the data transfer is aborted. All transfers are shifted into the serial port LSB first. The first byte of the transfer is for R/W and address and instruction information. The first bit is R/W instruction bit, 0 is for WRITE and 1 is for READ. Following 7 bits are Address. INSTRUCTION, 1 BIT ADDRESS, 7 BITS D98IN845 DATA, 8 BITS SDEN SCLK SDATA Figure 2. Serial Port Data Transfer Format. INTERNAL REGISTER DEFINITION Reg: Name: Type: Address: 0 VCM DAC (High) Register Write only 0Eh BIT LABEL DESCRIPTION 0 VDAC BIT8 VCM DAC bit 8 1 VDAC BIT9 VCM DAC bit 9 2 VDAC BIT10 VCM DAC bit 10 3 VDAC BIT11 VCM DAC bit 11 4 VDAC BIT12 VCM DAC bit 12 5 VDAC BIT13 MSB resistor ladder of the 14 bit VCM DAC 6 PSM/LINEAR Selects Voice Coil PSM or Linear Output Current Control. 1=PSM 0=Linear. 7 VCM_CAL VCM calibration. 1 = Enables VCM control circuits and tristates VCM power transistors. L6254 8/17 |
Аналогичный номер детали - L6254 |
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Аналогичное описание - L6254 |
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