W83627EHF_0611 Datasheet, PDF (47/144 Pages) Winbond – WINBOND LPC I/O

W83627EHF/EF, W83627EHG/EG
6.7 OVT# interrupt mode
The HM_SMI#/OVT# pin (pin 5) is a multi-function pin. The function is selected at Configuration
Register CR[29h] bit 6. The OVT# mode selection bits are at Bank0 Index18h bit4, Bank1 Index
52h bit1 and Bank2 Index 52h bit1.
(1) Comparator Mode :
Temperature exceeding T_O causes the OVT# output activated until the temperature is less than
T_HYST. ( Figure 6.19)
(2) Interrupt Mode:
Temperature exceeding T_O causes the OVT# output activated indefinitely until reset by reading
temperature sensor registers. Temperature exceeding T_O , then OVT# reset, and then
temperature going below T_HYST will also cause the OVT# activated indefinitely until reset by
reading temperature sensor registers. Once the OVT# is activated by exceeding T_O , then reset, if
the temperature remains above T_HYST , the OVT# will not be activated again.( Figure 6.19)
To
T_HYST
OVT#
(Comparator Mode; default)
OVT#
(Interrupt Mode)
*
*
*
*Interrupt Reset when Temperature sensor registers are read
Figure 6.19
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Publication Release Date: Nov. 2006
Revision 1.3