ADLINK CoreExpress-ECO2 - Manual (Page 23)

4.15 Get Number of PROCHOT#-Events
This command reads the PROCHOT#-Event-counter. PROCHOT# (processor hot), is asserted by the
CPU when the processor die temperature has reached its maximum operating temperature. Since
Thermal Monitor 2 is enabled, the reduces it's clock speed and decreases it's Core Voltage when
PROCHOT# is asserted. This counter gives the User an information of Cooling problems. This counter
is cleared when the system is removed from power.
START SMC_addr ACK command ACK START (Repeat) SMC_addr+1 ACK
length ACK(C) Byte 1 (MSB) ACK(C) … ACK(C) Byte 4 (LSB) ACK(C) STOP
Table 4.15.1 SMC transmitter format of the Get Number of PROCHOT#-Events Command
ITEM DESCRIPTION
START SM-bus start condition
SMC_addr 0x50 (8-bit)
ACK SM-bus acknowledge condition generated by receiver
command 0x3B = “Get Number of PROCHOT#-Events” Command code
length 0x04 = 4 Bytes data length
Byte 1-4 Value of PROCHOT#-Counter
STOP SM-bus stop condition
Table 4.15.2 Explanation of Table 4.15.1