SH3100 Datasheet, PDF (45/80 Pages) Semtech Corporation – Supervisory IC with I2C Interface and PWM

SH3100
POWER MANAGEMENT
Register Descriptions (continued)
Address(hex): 80
Register Name RTCAlarm/Scratchpad
Bit 7
Bit No.
[7:4]
Bit 6
Bit 5
Year (MSD)/SP[39:36]
Description
Year(MSD)/SP[39:36]
[3:0]
Year(LSD)/SP[35:32]
Address(hex): 81
Register Name RTCAlarm/Scratchpad
Bit 7
Bit No.
[7:5]
Bit 6
SP[31:29]
Description
SP[31:29]
Bit 5
[4]
Month(MSD)/SP[28]
[3:0]
Month(LSD)/SP[27:24]
Description
Bit 4
Bit Value
(R/W) RTC alarm or scratchpad Default Value: 0000 0000
Reset Event: P
Bit 3
Bit 2
Bit 1
Bit 0
Year (LSD)/SP[35:32]
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
Description
(R/W) RTC alarm or scratchpad Default Value: 0000 0000
Reset Event: P
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Month
(MSD)/SP[28]
Month(LSD)/SP[27:24]
Bit Value 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
© 2006 Semtech Corp.
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