SH3100 Datasheet, PDF (21/80 Pages) Semtech Corporation – Supervisory IC with I2C Interface and PWM

SH3100
POWER MANAGEMENT
Register Descriptions
Address(hex): 00
Register Name WakeupTime
Bit 7
Bit No.
[7:0]
Bit 6
Bit 5
Description
WakeupTime
Most significant byte of the
4-byte WakeupTime
Description
Bit 4
Bit Value
00 (hex)
(RW) 8 Most significant bits
of the WakeupTime .
Default Value: 0000 0000
Reset Event: P
Bit 3
Bit 2
Bit 1
Bit 0
Value Description
The Periodic Interval Timer (PIT) generates a periodic interrupt, the
interval of which is set by the four WakeupTime registers.
Period = WakeupTime/32768.
Setting WakeupTime to 0 disables the PIT
This register only takes effect once the least significant byte
(address 03) has been written. All four bytes should be written,
even if some have not changed
Address(hex): 01
Register Name WakeupTime
Description
Bit 7
Bit No.
[7:0]
Bit 6
Bit 5
Bit 4
Description
WakeupTime
Bits [23:16] of the 4-byte WakeupTime
(RW) Bits [23:16] of the
WakeupTime.
Default Value: 0000 0000
Reset Event: P
Bit 3
Bit 2
Bit 1
Bit 0
Bit Value Value Description
00 (hex) See register 00 description
Address(hex): 02
Register Name WakeupTime
Description
Bit 7
Bit No.
[7:0]
Bit 6
Bit 5
Bit 4
Description
WakeupTime
Bits [15:8] of the 4-byte WakeupTime
(RW) Bits [15:8] of the
WakeupTime.
Default Value: 0000 0000
Reset Event: P
Bit 3
Bit 2
Bit 1
Bit 0
Bit Value Value Description
00 (hex) See register 00 description
© 2006 Semtech Corp.
21
www.semtech.com