Rainbow Electronics MAX6696 - Manual (Page 14)

MAX6695/MAX6696
Reset (MAX6696 Only)
The MAX6696’s registers are reset to their power-on
values if RESET is driven high. When reset occurs, all
registers go to their default values, and the SMBus
address pins are sampled.
Conversion Rate Byte
The conversion-rate control register (Table 9) programs
the time interval between conversions in free-running
autonomous mode (RUN/STOP = 0). This variable rate
control can be used to reduce the supply current in
portable-equipment applications. The conversion rate
Dual Remote/Local Temperature Sensors with
SMBus Serial Interface
14 ______________________________________________________________________________________
BIT NAME POR FUNCTION
7(MSB) BUSY 1 A/D is busy converting when 1.
6 LHIGH 0
When 1, internal high-temperature ALERT has tripped, cleared by POR or by reading this status
register. If the fault condition still exists, this bit is set again after the next conversion.
5 LLOW 0
When 1, internal low-temperature ALERT has tripped, cleared by POR or by reading this status
register. If the fault condition still exists, this bit is set again after the next conversion.
4 R1HIGH 0
A 1 indicates external junction 1 high-temperature ALERT has tripped, cleared by POR or by
reading this status register. If the fault condition still exists, this bit is set again after the next
conversion.
3 R1LOW 0
A 1 i nd i cates exter nal j uncti on 1 l ow - tem p er atur e ALE RT has tr i p p ed , cl ear ed b y P OR or b y r ead i ng thi s
status r eg i ster . If the faul t cond i ti on sti l l exi sts, thi s b i t i s set ag ai n after the next conver si on.
2 1OPEN 0
A 1 indicates external diode 1 is open, cleared by POR or by reading this status register. If the
fault condition still exists, this bit is set again after the next conversion.
1 R1OT1 0
A 1 indicates external junction 1 temperature exceeds the OT1 threshold, cleared by reading this
register.
0 IOT1 0
A 1 indicates internal junction temperature exceeds the internal OT1 threshold, cleared by
reading this register.
Table 7. Status Register 1 Bit Assignments
BIT NAME POR FUNCTION
7(MSB) IOT2 0
A 1 indicates internal junction temperature exceeds the internal OT2 threshold, cleared by
reading this register.
6 R2OT2 0
A 1 indicates external junction temperature 2 exceeds the external OT2 threshold, cleared by
reading this register.
5 R1OT2 0
A 1 indicates external junction temperature 1 exceeds the OT2 threshold, cleared by reading this
register.
4 R2HIGH 0
A 1 indicates external junction 2 high-temperature ALERT has tripped; cleared by POR or readout
of the status register. If the fault condition still exists, this bit is set again after the next conversion.
3 R2LOW 0
A 1 indicates external junction 2 low-temperature ALERT has tripped; cleared by POR or readout
of the status register. If the fault condition still exists, this bit is set again after the next conversion.
2 2OPEN 0
A 1 indicates external diode 2 open; cleared by POR or readout of the status register. If the fault
condition still exists, this bit is set again after the next conversion.
1 R2OT1 0
A 1 indicates external junction 2 temperature exceeds the OT1 threshold, cleared by reading this
register.
0 RFU 0 Reserved.
Table 8. Status Register 2 Bit Assignments