SCH3112I-NE SMSC [SMSC Corporation], SCH3112I-NE Datasheet - Page 283

• Manufacturer Part Number: SCH3112I-NE
• Description: LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
• Manufacturer: SMSC [SMSC Corporation]

LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
Datasheet
SMSC SCH311X
24.2.67
24.2.68
24.2.69
24.2.70
Register
Address
Register
Address
Register
Address
Register
Address
0D1h
0D6h
0DBh
CEh
CBh
E0h
Read/
/Write
Read/
Write
Read/
Read
Write
Write
R/W
R/W
R/W
R/W
R/W
R/W
Bits[2:0] THERMTRIP zone status bits (one bit per zone). A status bit is set to ‘1’ if the associated
zone temp exceeds the associated THERMTRIP Temp Limit register value.
Register CBh: THERMTRIP Output Enable Register
These registers become read only when the Lock bit is set. Any further attempts to write to these
registers shall have no effect.
Bits[2:0] in THERMTRIP Output Enable register, THERMTRIP output enable bits (one bit per zone).
Each zone may be individually enabled to assert the nTHERMTRIP pin if the zone temperature reading
exceeds the associated THERMTRIP Temp Limit register value. 1=enable, 0=disable (default)
Register CEh: SMSC Reserved Register
Registers D1,D6,DBh: PWM Max Segment Registers
These registers become read only when the Lock bit is set. Any further attempts to write to these
registers shall have no effect.
Registers 0D1h, 0D6h and 0DBh are used to program the Max PWM duty cycle for the fan function
for each PWM.
Register E0h: Enable LSbs for Auto Fan
Bits[7:6] Reserved
Bits[5:4] PWM3_n[1:0]
Bits[3:2] PWM2_n[1:0]
Bits[1:0] PWM1_n[1:0]
Enable LSbs for AutoFan
Register Name
Register Name
Register Name
Output Enable
THERMTRIP
Register Name
PWM1 Max
PWM2 Max
PWM3 Max
(MSb)
Bit 7
RES
(MSb)
DATASHEET
Bit 7
(MSb)
RES
Bit 7
RES
(MSb)
Bit 7
Bit 6
RES
7
7
7
267
Bit 6
RES
Bit 6
RES
Bit 6
PWM3
Bit 5
_n1
6
6
6
Bit 5
RES
Bit 5
RES
Bit 5
PWM3
5
5
5
Bit 4
_n0
Bit 4
RES
Bit 4
RES
Bit 4
4
4
4
PWM2
Bit 3
_n1
Bit 3
RES
Bit 3
RES
Bit 3
3
3
3
PWM2
Bit 2
_n0
Bit 2
RD2
Bit 2
_INT
Bit 2
RD2
_EN
2
2
2
PWM1
Bit 1
Bit 1
_n1
RD1
Bit 1
Bit 1
_INT
RD1
_EN
1
1
1
Rev 0.2 (09-28-04)
(LSb)
Bit 0
PWM1
(LSb)
AMB
(LSb)
Bit 0
(LSb)
Bit 0
AMB
INT_
Bit 0
_n0
EN
0
0
0
_
Default
Default
Default
Value
Value
Value
00h
Default
FFh
FFh
FFh
00h
Value
00h