BD8255MUV-M Datasheet, PDF (12/46 Pages) Rohm – Built-in Serial Peripheral Interface

BD8255MUV-M
Datasheet
・ REG 73h -
Bit
Name
Default
7
-
-
6
-
-
5
-
-
4
-
-
3
-
-
2
-
-
1
-
-
0
-
-
Function
-
-
-
-
-
-
-
-
Set "0"
-
-
-
-
-
-
-
-
Set "1"
-
-
-
-
-
-
-
-
Reset
-
-
-
-
-
-
-
-
・ REG 74h DRIVER_SET (Read / Write)
Operation mode settings of the driver can be changed in REG 74h.
Bit
Name
Default
Function
Set "0"
Set "1"
Reset
7
N/A
0
-
-
-
-
6
SP_BRAKE
0
SP Brake Mode
Short Brake
Reverse Brake
A
5 GAIN_SELFC
0
Gain Select FC
Low Gain
High Gain
A
4
GAIN_SELTK
0
Gain Select TK
Low Gain
High Gain
A
3
N/A
0
2
LD_BRAKE
0
1 GAIN_SELLD
0
-
LD Brake Mode
Gain Select LD
-
-
-
LD Output Active
LD Output
Short Brake
A
Low Gain
High Gain
A
0
N/A
0
-
-
-
-
<Bit 6> Short brake/reverse brake can be selected as spindle brake mode.
<Bit 5> Low/high gain mode of the focus driver's gain can be selected.
<Bit 4> Low/high gain mode of the tracking driver's gain can be selected.
<Bit 2> Short brake mode (both positive & negative output low) can be activated when loading output is "Active".
<Bit 1> Low/high gain mode of the loading driver's gain can be switched.
・ REG 75h RESET (Write)
Resister settings and latched error flag can be reset in REG 75h.
Bit
Name
Default
7
RST_DAC
0
6 RST_CTLREG
0
5 RST_PKTERR
0
4 RST_PKTSTOP
0
Function
DAC Reset
Control Register Reset
Packet Bit Counts Error Reset
No Packet Input Error Reset
3
N/A
2
RST_SHORT
0
-
0 ^{LD Supply/Ground-Fault Protection Latch Off Reset}
1
N/A
0
-
0
N/A
0
-
<Bit 7>Reset all DAC register value to 0.
<Bit 6>Reset all control register value to default.
<Bit 5>Reset packet bit counts error flag register value to 0.
<Bit 4>Reset no packet input error flag register value to 0.
<Bit 2>Reset loading supply/ground-fault protection flag register value to 0.
Set "0"
Normal
Normal
Normal
Normal
-
Normal
-
-
Set "1"
Reset
Reset
Reset
Reset
-
Reset
-
-
Reset
E
E
E
E
-
E
-
-
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TSZ22111・15・001
12/43
TSZ02201-0G1G0BK00210-1-2
18.Apr.2014 Rev.003