EMC6D103-CK SMSC [SMSC Corporation], EMC6D103-CK Datasheet - Page 80

• Manufacturer Part Number: EMC6D103-CK
• Description: FAN CONTROL DEVICE WITH HIGH FREQUENCY PWM
• Manufacturer: SMSC [SMSC Corporation]

Revision 0.4 (04-04-05)
8.2.36
8.2.37
8.2.38
Register
Address
Register
Address
Register
Address
8Eh
8Dh
90h
91h
92h
93h
Read/
Write
Read/
Read/
Write
Write
R/W
R/W
R/W
R/W
R/W
R
Registers 8Dh: SMSC Test Register
This register becomes read only when the Lock bit is set. Any further attempts to write to this register
shall have no effect.
This register must not be written. Writing this register may produce unexpected results.
Registers 8Eh: SMSC Test Register
This register is an SMSC Test register.
Registers 90h-93h: TachX Option Registers
These registers become read only when the Lock bit is set. Any further attempts to write to these
registers shall have no effect.
Bit[0] SLOW
0=Force tach reading register to FFFEh if number of tach edges detected is greater than 0, but less
than programmed number of edges.(default)
1= Force tach reading register to FFFFh if number of tach edges detected is greater than 0, but less
than programmed number of edges.
Bit[2:1] The number of edges for tach1 reading:
00=2 edges
01=3 edges
10=5 edges (default)
11=9 edges
Bit[3] Tachometer Reading Mode
0=mode 1 – standard (default)
Register Name
SMSC Test Register
Tach1 Option
Tach2 Option
Tach3 Option
Tach4 Option
SMSC Test Register
Register Name
Register Name
Table 8.55 Registers 8Dh: SMSC Test Register
Table 8.56 Registers 8Eh: SMSC Test Register
Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
(MSb)
Bit 7
(MSb)
TST7
Bit 7
DATASHEET
(MSb)
RESERVED
RESERVED
RESERVED
RESERVED
Bit 7
RES
Bit 6
TST6
Bit 6
80
Bit 6
RES
Bit 5
TST5
Bit 5
Bit 5
RES
3EDG
3EDG
3EDG
3EDG
Bit 4
TST4
TST4
Bit 4
Bit 4
MODE
MODE
MODE
MODE
Bit 3
TST3
TST3
Bit 3
Bit 3
EDG1
EDG1
EDG1
EDG1
Bit 2
TST2
TST2
Bit 2
Bit 2
EDG0
EDG0
EDG0
EDG0
Bit 1
TST1
TST1
Bit 1
Bit 1
SMSC EMC6D103
SLOW
SLOW
SLOW
SLOW
(LSb)
(LSb)
(LSb)
TST0
TST0
Bit 0
Bit 0
Bit 0
Datasheet
Default
Default
Default
Value
Value
Value
0Eh
N/A
04h
04h
04h
04h