SH3100 Datasheet, PDF (26/80 Pages) Semtech Corporation – Supervisory IC with I2C Interface and PWM

SH3100
POWER MANAGEMENT
Register Descriptions (continued)
Address(hex): 15
Register Name InterruptStatus
Description
Bit 7
Bit No.
[5]
Bit 6
Bit 5
SNSE Fault
Description
SNSE Fault interrupt
Bit 4
ADC Done
Bit Value
0
1
[4]
ADC conversion complete
0
indicator interrupt
1
[2]
RTC alarm interrupt
0
1
[1]
Comparator trigger interrupt
0
1
[0]
PIT interrupt
0
1
(R/W) Indicates status of all
interrupt sources, and may be
used to selectively clear any
number of these.
Default Value: 0000 0000
Reset Event: P, W
Bit 3
Bit 2
Bit 1
Bit 0
RTC Alarm
Value Description
Comparator
trigger
PIT expired
No SNSE faults detected
In fan control mode, AND the fan is currently active, i.e. the
PWM duty cycle is non-zero, this indicates that no SNSE pulse
were detected within the last 32768 CLK1 cycles (1 second if
CLK1 is set for 32.768 kHz), irrespective of whether CLK1
output is enabled or not
In other device modes, this indicates that no activity has been
detected on the general-purpose comparator for the last 32768
CLK1 cycles, irrespective whether CLK1 is enabled
Write ‘1’ to this bit to clear the SNSE Fault interrupt
ADC conversion is not complete
ADC conversion is complete, and the result may be read in the
ADCResult register
Write ‘1’ to this bit to clear the ADCDone interrupt
RTC alarm has not triggered
RTC alarm has triggered
Write ‘1’ to this bit to clear the RTC alarm interrupt
Comparator interrupt has not triggered
If the CompIntPolarity bit in the Config register is set, then this
indicates that the comparator source has risen above the DAC
level. If the CompIntPolarity bit is clear, then this indicates that
the comparator source has fallen below the DAC level
Write ‘1’ to this bit to clear the RTC alarm interrupt
PIT has not expired
PIT has expired
Write ‘1’ to this bit to clear the RTC alarm interrupt
Address(hex): 16
Register Name ADCResult
Bit 7
Bit 6
Bit No.
[7:0]
Description
ADC Result
Bit 5
Bit Value
00 (hex)
Description
(R) ADC Conversion Result
Default Value: 1000 0000
Reset Event: P, W
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ADC Conversion Result
Value Description
Result of 8-bit successive approximation analog to digital conversion
© 2006 Semtech Corp.
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