EMC6D103-CK SMSC [SMSC Corporation], EMC6D103-CK Datasheet - Page 54

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

Revision 0.4 (04-04-05)
8.1
8.2
8.2.1
8.2.2
Register
Address
Register
Address
10h
20h
21h
Read/
Read/
Write
Write
R/W
Note: SMSC Test Registers may be read/write registers. Writing these registers can cause unwanted
Note 8.1
Note 8.2
Note 8.3
Note 8.4
Note 8.5
Note 8.6
Note 8.7
The registers shown in
reads to undefined registers always return 00h. Writes to undefined registers have no effect and do
not return an error.
Register
Setting the Lock bit has no effect on this register.
This register must not be written. Writing this register may produce unexpected results.
Registers 20-24h: Voltage Reading
Undefined Registers
Defined Registers
R
R
results.
The PWMx Current Duty Cycle Registers are only writable when the associated fan is in
manual mode. In this case, the register is writable when the start bit is set, but not when
the lock bit is set.
The Lock bit in the Ready/Lock/Start register is locked by the Lock Bit. The START and
OVRID bits are always writable, both when the start bit is set and when the lock bit is set.
The Interrupt status registers are cleared on a read if no events are active
The INTEN bit in register 7Ch is always writable, both when the start bit is set and when
the lock bit is set.
In Shutdown Mode (LPMD=1 & START=0) all the H/W Monitoring registers/bits are not
accessible except for the following: Bits[2:0] in the Special Function Register (SFTR) at
offset 7Ch and Bits[7:0] in the Configuration register at offset 7Fh.
These Reserved bits are read/write bits. Writing these bits to a ‘1’ has no effect on the
hardware.
SMSC bits may be read/write bits. Writing these bits to a value other than the default value
may cause unwanted results
10h: SMSC Test Register
Register Name
SMSC TEST
Register Name
+2.5V Reading
Vccp Reading
Table 8.2
Table 8.3 Registers 20-24h: Voltage Reading
Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
Table 8.1, "Register Summary"
Register
(MSb)
TST7
Bit 7
DATASHEET
(MSb)
Bit 7
7
7
10h: SMSC Test Register
TST6
Bit 6
54
Bit 6
6
6
TST5
Bit 5
Bit 5
5
5
above are the defined registers in the part. Any
TST4
Bit 4
Bit 4
4
4
TST3
Bit 3
Bit 3
3
3
TST2
Bit 2
Bit 2
2
2
TST1
Bit 1
Bit 1
1
1
SMSC EMC6D103
(LSb)
(LSb)
TST0
Bit 0
Bit 0
0
0
Datasheet
Default
Default
Value
Value
N/A
N/A
00h