SCH3112I-NE SMSC [SMSC Corporation], SCH3112I-NE Datasheet - Page 284

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

Rev 0.2 (09-28-04)
24.2.71
Register
Address
Register
Address
PWMX_N[1:0]
ECh
EDh
E9h
EAh
EBh
EEh
FFh
00
01
10
11
/Write
Read
/Write
R/W
R/W
R/W
R/W
R/W
R/W
Read
R
The PWMx_n[1:0] configuration bits allow the autofan control logic to utilize the extended resolution
bits in the temperature reading. Increasing the precision reduces the programmable temperature range
that can be used to control the PWM outputs. For a description of the programmable temperature
ranges see
Note: Increasing the precision does not limit the range of temperature readings supported. The active
Register E9-EEh:
These are SMSC Test Registers. Writing to these registers may cause unwanted results.
Register FFh:
This register is an SMSC Test register.
PER LSB USED IN AUTOFAN
DEGREE OF RESOLUTION
region for the autofan control is bound by the Minimum Zone Limit + Range, where the
Minimum Zone Limit can be any integer value from -127 to +127 degrees.
Table 24.18 Programming Options for the
SMSC Test Register
SMSC Test Register
SMSC Test Register
SMSC Test Register
SMSC Test Register
SMSC Test Register
SMSC Test Register
Register Name
Registers 5F-61h: Zone Temperature Range, PWM Frequency on page
Register
Name
Reserved
0.25
0.5
1
SMSC Test Register
SMSC Test Registers
(MSb)
(MSb)
TST7
TST7
TST7
TST7
TST7
TST7
TST7
Bit 7
Bit 7
DATASHEET
LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
TEMPERATURE RANGE
268
TST6
TST6
TST6
TST6
TST6
TST6
TST6
Bit 6
Bit 6
MAX THEORETICAL
SUPPORTED
Reserved
TST5
TST5
TST5
TST5
TST5
TST5
TST5
Bit 5
Bit 5
128.5
64.75
255
TST4
TST4
TST4
TST4
TST4
TST4
TST4
Bit 4
Bit 4
PWMX_N[1:0]
TST3
TST3
TST3
TST3
TST3
TST3
TST3
Bit 3
Bit 3
TST2
TST2
TST2
TST2
TST2
TST2
TST2
Bit 2
Bit 2
TEMPERATURE RANGE
MAX PROGRAMMABLE
Bits
SUPPORTED
TST1
TST1
TST1
TST1
TST1
TST1
TST1
Bit 1
Bit 1
Reserved
53.33
80
80
244.
(LSb)
SMSC SCH311X
(LSb)
TST0
TST0
TST0
TST0
TST0
TST0
TST0
Bit 0
Bit 0
Datasheet
Default
Default
Value
Value
N/A
00h
00h
00h
00h
00h
00h