SH3100IMTR SEMTECH [Semtech Corporation], SH3100IMTR Datasheet - Page 33

• 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 FLLDivideRatio
Register Name FLLDivideRatio
Register Name ResetThreshold
Address(hex): 23
Address(hex): 24
Address(hex): 30
Bit No.
Bit No.
Bit No.
Bit 7
[5:0]
Bit 7
[7:0]
Bit 7
[6:0]
Description
FLLDivideRatio[13:8]
THIS REGISTER IS FUSE
INITIALIZED
Description
FLLDivideRatio[7:0]
THIS REGISTER IS FUSE
INITIALIZED
Description
ResetThreshold
THIS REGISTER IS FUSE
INITIALIZED
Bit 6
Bit 6
Bit 6
(continued)
Bit 5
Bit 5
Bit 5
Description
Description
Description
Bit Value
Bit Value
Bit Value
FLLDivideRatio[7:0]
Bit 4
Bit 4
Bit 4
33
ResetThreshold
(R/W) Defines the ratio
between the HFDCO and
32.768 kHz source when FLL is
enabled
Value Description
The upper 6 bits of the FLLDivideRatio. When the FLL is
enabled and locked, the HFDCO frequency is
2048*(FLLDivideRatio+1)
Note that this register may not be changed if the
App-specificFuseWP bit in the WriteProtects register is set
(R/W) Defines the ratio
between the HFDCO and
32.768 kHz source when FLL is
enabled
Value Description
The least significant byte of the FLLDivideRatio. When the FLL
is enabled and locked, the HFDCO frequency is
2048*(FLLDivideRatio+1)
Note that this register may not be changed if the
App-specificFuseWP bit in the WriteProtects register is set
(R/W) Sets the brownout (VBO)
level
Value Description
This 7-bit register sets the minimum voltage level (VBO) which
would cause a brownout reset and subsequent assertion of the
NRST pin. VBO = 1.7 V to 4 V with 24 mV resolution
Note that this register may not be changed if the
ResetThresholdWP bit in the WriteProtects register is set
FLLDivideRatio[13:8]
Bit 3
Bit 3
Bit 3
Bit 2
Bit 2
Bit 2
Default Value: 0000 0000
Reset Event: P, W, B
Default Value: 0000 0000
Reset Event: P, W, B
Default Value: 0000 0000
Reset Event: P, W
Bit 1
Bit 1
Bit 1
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SH3100
Bit 0
Bit 0
Bit 0