MEC1322 Datasheet, PDF (306/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
Offset ^0Eh
Bits
Description
15:3 TACH_READING[12:0]
The current tachometer reading value.
2:0 RESERVED
26.9.13 PWM DRIVER BASE FREQUENCY REGISTER
- The PWM Driver Base Register controls the base PWM frequency range.
Offset ^10h
Bits
Description
7:2 RESERVED
1:0 PWM_BASE[1:0]
Determines the frequency range of the PWM fan driver (when
enabled) as shown in Table 26-18.
Type
RES
R/W
Default
Reset
Event
1111111111 VCC1_R
111b
ESET
000b
-
Type
RES
R/W
Default
000000b
00b
Reset
Event
-
VCC1_R
ESET
TABLE 26-18: PWM_BASE[1:0] DECODE
PWM_BASE[1:0]
1
0
0
0
0
1
1
0
1
1
26.9.14 FAN STATUS REGISTER
The bits in this register are routed to interrupts.
PWM Frequency
26.83KHz
20.87kHz
4.82kHz
2.41KHz
Offset ^11h
Bits
Description
Type
7:6 RESERVED
5 DRIVE_FAIL
The bit Indicates that the RPM-based Fan Speed Control Algorithm
cannot drive the Fan to the desired target setting at maximum drive.
• ‘0’ - The RPM-based Fan Speed Control Algorithm can drive
Fan to the desired target setting.
• ‘1’ - The RPM-based Fan Speed Control Algorithm cannot drive
Fan to the desired target setting at maximum drive.
4:2 RESERVED
RES
R/WC
RES
Default
00b
0b
Reset
Event
-
VCC1_R
ESET
000b
-
DS00001719D-page 306
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