OM5193 Philips Semiconductors, OM5193 Datasheet - Page 23

• Manufacturer Part Number: OM5193
• Description: Disk drive spindle and VCM with servo controller
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Table 13 Truth table for bits 7 and 8 on register#0 in write mode; conversion mode options; note 1
Note
1. The autoConvSelect bit has priority over the incrementChannel bit.
8.4.5
The ADC internal clock named converterClock can have two different frequency values by programming register#6 (11)
(bit highClock_N):
Register#6 (11) = 1: means converterClock = Master clock (f
Register#6 (11) = 0: means converterClock = Master clock (f
Table 14 Numerical application
8.5
The VCM DAC is a signed 10-bit digital-to-analog convertor. It will start the conversion when register#2 is written.
The lowest 10 bits contain the value to be converted.
Table 15 Input code and corresponding output analog voltage
The overall accuracy is 2% absolute error not including the contribution of the reference voltage and guaranteed
monotonicity.
1998 Nov 02
conversionTime
Conversion time
Disk drive spindle and VCM with
servo controller
REGISTER#0 (7)
autoConvSelect
TIME
10-bit VCM DAC
C
ONVERTER CLOCK FREQUENCY VALUES
0
1
1
0
=
13 clockDivider
-------------------------------------------- -
MASTER CLOCK = 10 MHz
DIVISION
INPUT CODE
10.4 s
BY 8
f
CLOCK
1FFH
200H
000H
incrementChannel
REGISTER#0 (8)
DIVISION
0
0
1
1
5.2 s
BY 4
MASTER CLOCK = 20 MHz
Default state: no auto channel incrementation, no A/D
conversion started automatically after each read of the result.
Starts automatically an A/D conversion on the same channel
(no channel incrementation) after each read of the result.
Starts automatically an A/D conversion on the next channel
(increment the channel by 1) after each read of the result.
No auto channel incrementation, no A/D conversion started
automatically after each read of the result (similar to the default
state ‘00’).
DIVISION
5.2 s
BY 8
23
CLOCK
CLOCK
) divided by 8 (clockDivider = 8)
) divided by 4 (clockDivider = 4)
DIVISION
2.6 s
BY 4
DESCRIPTION
OUTPUT VOLTAGE
1.5 V
2.5 V
3.5 V
MASTER CLOCK = 30 MHz
DIVISION
3.4 s
BY 8
Product specification
OM5193H
DIVISION
1.7 s
BY 4
(10)