1999 June 10

13

Philips Semiconductors

Preliminary specification

5 V spindle & VCM driver combo

TDA5345HT

bit 0 (TempSelect): selects whether the TempMux pin is a digital output (temperature-high warning) when

TempSelect = ‘0’ or an analog output (temperature monitor) when TempSelect = ‘1’.

bit [11, 9] (Speed[14, 12]): division factor used to set the spindle speed controlled by onboard FLL/PLL (2 MSBs only).

bit [8, 7] (PllCur[0, 1]): Programmable current for the PLL charge pump.

bit 6 (Dac6ToVcm): 6-bit DAC is connected to the VCM section when Dac6ToVcm = ‘1’, else connected to the spindle.

bit [5, 0] (Dac6[5, 0]): 6-bit word converted to a current by the 6-bit DAC.

bit [11, 0] (Speed[11, 0]): division factor used to set the spindle speed controlled by onboard FLL/PLL (12 LSBs only).

bit [11, 0] (Dac12a[11, 0]): 12-bit word sent to the VCM 12-bit DAC. Low gain selected for the VCM loop.

bit [11, 0] (Dac12b[11, 0]): 12-bit word sent to the VCM 12-bit DAC. High gain selected for the VCM loop.

REGISTER #9

bit [10] (Shock thresh[23):set the shnock sensor threshold value.