wm8351 Wolfson Microelectronics plc, wm8351 Datasheet - Page 208

• Manufacturer Part Number: wm8351
• Description: Wolfson Audioplus? Stereo Codec With Power Management
• Manufacturer: Wolfson Microelectronics plc

WM8351
25 TEMPERATURE SENSING
25.1 CHIP TEMPERATURE MONITORING
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The WM8351 has a built-in sensor to monitor its internal temperature, with two levels of over-
temperature protection.
When the device temperature exceeds the thermal warning temperature, the WM8351 raises a
SYS_CHIP_GT115_EINT interrupt. If the chip temperature continues to rise, and exceeds the
thermal shutdown temperature, the SYS_CHIP_GT140_EINT interrupt is set and the device shuts
down. After a thermal shutdown, the WM8351 can only restart after its temperature has fallen below
the restart temperature.
The associated register fields are defined in Table 154.
R26 (1Ah)
Interrupt
Status 2
R34 (22h)
Interrupt
Status 2 Mask
Table 154 Temperature Sensing Interrupts
ADDRESS
2:1
BIT
2
1
SYS_CHIP_GT115_EINT
SYS_CHIP_GT140_EINT
“IM_” + name of respective bit
in R26
LABEL
Chip over 115°C temp limit.
(Rising Edge triggered)
Note: This bit is cleared once read.
Chip over 140°C temp limit.
(Rising Edge triggered)
Note: This bit is cleared once read.
Each bit in R34 enables or masks the
corresponding bit in R26. The default
value for these bits is 0 (unmasked).
DESCRIPTION
PD, June 2009, Rev 4.1
Production Data
208