L6000 ST Microelectronics, Inc., L6000 Datasheet - Page 6

• Manufacturer Part Number: L6000
• Description: Single Chip Read & Write Channel
• Manufacturer: ST Microelectronics, Inc.

L6000
PIN DESCRIPTION (continued)
6/24
ANALOG
15, 16
32, 31
SERIAL PORT
Pin #
50
62
48
45
44
49
33
42
41
10
3
8
9
SERIAL DATA I/O
SERIAL CLOCK+
SERIAL ENABLE
SERVO TC RES
FREQ SYN FLT,
DATA SEP FLT,
FREQ SYN FLT
DATA SEP FLT
LEVEL REF V
HOLD CAP A
HOLD CAP B
DAC TP OUT
SERVO BYP
DATA BYP
EF IREF
DS IREF
Symbol
LEVEL
Type
I/O
O
O
O
–
–
–
–
–
–
I
I
I
I
I
REFERENCE VOLTAGE: Reference voltage output for LEVEL. LEVEL REF V
is derived by referencing VRG (an internal signal) to Vcc PULSE DET.
REFERENCE RESISTOR INPUT: An external 1% resistor (RX) is connected
from this pin to ground to establish a precise reference current for the filter.
AGC INTEGRATING CAPACITOR: Connected between DATA BYP and Vcc
PULSE DET. This pin is used when data read mode.
AGC INTEGRATING CAPACITOR FOR SERVO: Connected between SERVO
BYP and Vcc PULSE DET. This pin is used when in servo read mode
PEAK HOLDING CAPACITOR A: Tied from this pin to GND PULSE DET.
PEAK HOLDING CAPACITOR B: Tied from this pin to GND PULSE DET.
HYSTERESIS LEVEL: An NPN emitter output that provides a full-wave
rectified signal from LEVEL to LEVEL REF V to set the hysteresis threshold
time constant in conjunction with SERVO TC RES and DATA TC RES. This
level used in VTHRESHOLD DAC.
REFERENCE RESISTOR INPUT: An external 1% resistor (RR) is connected
to this pin to establish a precise internal reference current for the data
separator and Frequency Synthesizer.
SERVO TIME CONSTANT RESISTOR INPUT: An external resistor is
connected from this pin to LEVEL to establish the hysteresis threshold time
constant when not in Servo mode.
PLL FILTER: The two connection points for the frequency synthesizer PLL
differential filter components.
PLL FILTER: THE Two connection points for the data separatorPLL differential
filter components.
DAC OUTPUT: A test point for some of the on-chip DACs. The output of an
internal DAC is selected by the values of TDAC1 (MSB) and TDACO (LSB) in
the WS register. The selected DAc output and its corresponding select bits are
as follows: FC_DAC (00), VTH_DAC (0 1), WS_DAC (1 0), and WP_DAC (1
1). When not using the DAC TP OUT pin, the preferred setting is to select the
FC_DAC.
SERIAL DATA ENABLE: Active high input pin to enable the serial port CMOS
input levels.
SERIAL DATA: Input/Output pin for serial data; 8 instruction/address bits are
sent first followed by 8 data bits. CMOS Input/Output levels.
SERIAL DATA CLOCK: Positive edge triggered clock input for the serial data
CMOS input levels. The pin has an internal pull-up resistor.
Description