SH3100 Datasheet, PDF (16/80 Pages) Semtech Corporation – Supervisory IC with I2C Interface and PWM

SH3100
POWER MANAGEMENT
Non-Volatile Fuse Memory Registers
The 96-bit non-volatile fuse memory contains the calibration and configuration control registers. The transfer column
indicates under which conditions the fuse contents are transferred to the chip control registers. Fuses are blown on
test and are extremely robust. There is no mechanism to reset fuses once blown. Calibration fuses are always set to
obtain the required parametric specifications. Application fuses are set as required.
P
Power on reset. (Power first applied)
W Watchdog reset event
B
Brownout (VDD drops below VBO threshold) R
Forced fuse read initiated by I²C access
Fuse Register
Bandgap reference
Internal 32.768kHz ±2% oscillator
Temperature sensor trim
VDD reset threshold (VBO)
Chip reset duration
Crystal load capacitance
Master HFDCO clock FLL control
Frequency is code x 2.048kHz
Accuracy is defined by 32.768kHz source
Type
Calibration
Calibration
Calibration
VBO Reset
Application
Application
Application
Master HFDCO clock start-up frequency
Direct HFDCO control if FLL disabled
Frequency versus code varies with process
CLK0 postscaler
CLK1 postscaler
Spread-spectrum amplitude
Spread-spectrum enable
CLK1 output enable
CLK1 switch to VBAK supply
CLK1 output invert
CLK1 force to 32.768kHz source
Chip mode select
I²C slave address
Regulator start-up voltage
Application
Application
Application
Application
Application
Application
Application
Application
Application
Application
Application
Application
Bits
Range of Values
4
Bandgap set to 1.17V ±1%
10
Set to 32.768kHz ±128Hz at 25°C
Transfer
P, W, R
P, W, B, R
4
Temperature sensor set to ±2°C accuracy P, W, B, R
7
1.7V to 4
5
6ms to 6 seconds
5
5pF to 22pF
P, W, R
P, W, R
P, R
14
8MHz to 33. MHz
P, W, B, R
16
Nominally 6MHz to 42MHz
P, W, B, R
3
1 to 128
P, W, B, R
4
1 to 32768
P, W, R
2
32kHz to 128kHz
P, W, B, R
1
On or Off
P, W, B, R
1
On or Off
P, W, R
1
On or Off
P, W, R
1
On or Off
P, W, R
1
On or Off
P, W, R
3
Normal, boost, buck, LDO, fan control
P, W, R
3
1 of 8 addresses
P, W, B, R
4
1.9V to 4.5V
P, W, R
© 2006 Semtech Corp.
16
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