AN1139 STMicroelectronics, AN1139 Datasheet - Page 9

• Manufacturer Part Number: AN1139
• Description: L6254 - L6268 - L6269 12V DISK DRIVE POWER COMBO IC
• Manufacturer: STMicroelectronics

3.2
Table 1. Register Map
Reg#0: Bit0~Bit5, D8~D13 of VCM DAC
Reg#1: Bit0~Bit7, D0~D7 of VCM DAC
Reg#2: Bit0, “0” to “1” transition increments Spindle sequencer
Reg#3: Bit0, “1” 7.5 Spindle Mask time, “0” 15 Spindle Mask time
Reg.
10
11
12
0
1
6
7
8
9
2
3
4
5
REGISTERS MAP
VCM DAC
HIGH BYTE
VCM DAC
LOW BYTE
SPINDLE
CONTROL
SPINDLE
DELAY
FLL COARSE
COUNTER
COARSE/FINE
COUNTER
FLL FINE
COUNTER
SPINDLE
STATUS
SPINDLE FLL
SYSTEM
CONTROL
TEST
CONTROL
VCM
CONTROL
CHIP ID
Bit6, “1” VCM PSM mode, “0” VCM Linear mode
Bit7, “1” VCM calibration
Bit1, “1” Spindle Internal Align & Go Start-Up, “0” Spindle External Start-Up
Bit2, “1” Resets Spindle sequencer to phase 1 (A -B)
Bit3, “1” Starts Spindle Align & Go Start-Up, “0” Resets control logic and brakes the Spindle
Bit4, “1” Enables Spindle outputs, “0” disables Spindle outputs
Bit5, “1” Electrical cycle for Spindle FLL control, “0” Mechanical cycle for FLL control
Bit6, “1“ Spindle PWM mode, “0” Spindle Linear mode
Bit7, “1” External Spindle loop feedback (via Index pin), “0” Internal Spindle Loop feedback
Description
RETRACT
VB/DIS
REV_7
SET 0
_CAL
VDAC
Bit 7
VCM
CPH
EXT/
C11
BIT7
SD0
GO
ID_
INT
C3
F7
ALIGN
SET 0
REV_6
VDAC
PWM/
PSM/
SET 0
Bit 6
BIT6
SD1
CPL
C10
LIN
LIN
RT1
ID_
C2
F6
ERROR
VCM_EN DOUBLE
BRAKE FLL_OUT
_LOCK
MECH/
REV_5
SET 0
VDAC
BIT13
VDAC
ELEC
Bit 5
BIT5
SD2
REV_
ID_
IL0
C9
C1
F5
SPIN_E
REV_4
_TIME
MASK
VDAC
VDAC
BIT12
Bit 4
BIT4
SD3
SET 0
ID_
IL1
C8
C0
F4
N
PHASE
(*) 2/3_
REV_3
SLEW
VDAC
BIT11
VDAC
FAULT
ISNS
COM
BIT3
RUN
SET 0
8_12_
POLE
Bit3
ID_
RT0
C7
F3
ROTOR_
STUCK
SLEEP
REV_2
VDAC
VDAC
SET 0
BIT10
R_SE
SET 0
MIN1
Bit 2
BIT2
F10
ID_
VR
C6
F2
Q
AN1139 APPLICATION NOTE
THERMAL
_WARN
REV_1
START
PKV_2
VCMH
SET 0
VDAC
VDAC
MIN2
Bit 1
BIT9
BIT1
_UP
ICP
ID_
C5
F9
F1
THERMAL
SSLEW
INCRE
PKV_1
REV_0
_TIME
VCMS
MASK
SET 0
VDAC
VDAC
_SEQ
Bit 0
BIT8
BIT0
ID_
C4
F8
F0
0Eh
00001110
1Eh
00011110
2Eh
00101110
3Eh
00111110
4Eh
01001110
5Eh
01011110
6Eh
01101110
7Fh
01111111
8Eh
10001110
9Eh
10011110
AEh
10101110
BEh
10111110
FFh
11111111
Address
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