SH3100IMTR SEMTECH [Semtech Corporation], SH3100IMTR Datasheet - Page 45

• Manufacturer Part Number: SH3100IMTR
• Description: Supervisory IC with I2C Interface and PWM
• Manufacturer: SEMTECH [Semtech Corporation]

© 2006 Semtech Corp.
POWER MANAGEMENT
Register Descriptions
Register Name RTCAlarm/Scratchpad
Register Name RTCAlarm/Scratchpad
Address(hex): 80
Address(hex): 81
Bit No.
Bit No.
Bit 7
[7:4]
[3:0]
Bit 7
[7:5]
[3:0]
[4]
Description
Year(MSD)/SP[39:36]
Year(LSD)/SP[35:32]
Description
SP[31:29]
Month(MSD)/SP[28]
Month(LSD)/SP[27:24]
SP[31:29]
Bit 6
Bit 6
Year (MSD)/SP[39:36]
(continued)
Bit 5
Bit 5
Description
Description
(MSD)/SP[28]
Bit Value
Bit Value
Month
Bit 4
Bit 4
45
(R/W) RTC alarm or scratchpad
Value Description
When the RTC alarm interrupt enable is active, this is the upper
BCD digit of the year at which the interrupt should be activated.
When not used as an RTC alarm, these bits can be used as
scratchpad, and remain throughout a brownout condition.
When the RTC alarm interrupt enable is active, this is the lower
BCD digit of the year at which the interrupt should be activated.
When not used as an RTC alarm, these bits can be used as
scratchpad, and remain throughout a brownout condition
(R/W) RTC alarm or scratchpad
Value Description
Bits [31:29] of the scratchpad memory, irrespective of whether
the RTC alarm interrupt is active
These bits remain throughout brownout
When the RTC alarm interrupt enable is active, this is the upper
BCD digit of the calendar month at which the interrupt should
be activated
When not used as an RTC alarm, these bits can be used as
scratchpad, and remain throughout a brownout condition
When the RTC alarm interrupt enable is active, this is the lower
BCD digit of the month at which the interrupt should be
activated
When not used as an RTC alarm, these bits can be used as
scratchpad, and remain throughout a brownout condition
Bit 3
Bit 3
Month(LSD)/SP[27:24]
Year (LSD)/SP[35:32]
Bit 2
Bit 2
Default Value: 0000 0000
Reset Event: P
Default Value: 0000 0000
Reset Event: P
Bit 1
Bit 1
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Bit 0
Bit 0