W83637HF Datasheet, PDF (42/149 Pages) Winbond – LPC I/O

W83637HF
6.7 OVT# Interrupt Mode
The SMI#/OVT# pin (pin105) is a multi-function pin. The function is selected at Configuration
Register CR[28h] bit 6. The OVT# mode selection bits are at Bank0 Index18h bit4, Bank1
Index52h bit1and Bank2 Index52h bit1.
(1) Comparator Mode
Temperature exceeding T_O causes the OVT# output activated until the temperature is less than
T_HYST. (Figure 6.16)
(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 sensor2 or sensor 3 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 6.16)
To
T_HYST
OVT#
(Comparator Mode; default)
OVT#
(Interrupt Mode)
*
*
*
*Interrupt Reset when Temperature sensor registers are
read
Figure 6.16
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Publication Release Date: June 25, 2003
Revision 1.3