MMPF0100 datasheet(23/136 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

PF0100

Functional Block Requirements and Behaviors

Start-up

7.1.2.4

Soft Start Ramp Rate

The start-up ramp rate or soft start ramp rate can be chosen from the same options as shown in Dynamic Voltage Scaling.

7.1.3

OTP Prototyping

Before permanently programming fuses, it is possible to test the desired configuration by using the “Try Before Buy” feature. With

this feature, the configuration is loaded from the OTP registers. These registers merely serve as temporary storage for the values

to be written to the fuses, for the values read from the fuses, or for the values read from the default configuration. To avoid

confusion, these registers will be referred to as the TBBOTP registers. The portion of the register map that concerns OTP is

shown in Table 136 and Table 137.

The contents of the TBBOTP registers are initialized to zero when a valid VIN is first applied. The values that are then loaded

into the TBBOTP registers depend on the setting of the VDDOTP pin and on the value of the TBB_POR and FUSE_POR bits.

Refer to Table 15.

• If VDDOTP = VCOREDIG (1.5 V), the values are loaded from the default configuration.

• If VDDOTP = 0.0 V, TBB_POR = 0 and FUSE_POR = 1, the values are loaded from the fuses.

• If VDDOTP = 0.0 V, TBB_POR = 0 and FUSE_POR = 0, the TBBOTP registers remain initialized at zero.

The initial value of TBB_POR is always “0”; only when VDDOTP = 0.0 V and TBB_POR is set to “1” are the values from the

TBBOTP registers maintained and not loaded from a different source.

The contents of the TBBOTP registers are modified by I2C. To communicate with I2C, VIN must be valid and VDDIO, to which

SDA and SCL are pulled up, must be powered by a 1.7 to 3.6 V supply. VIN, or the coin cell voltage must be valid to maintain

the contents of the registers. To power on with the contents of the TBBOTP registers, the following conditions must exist; VIN is

valid, VDDOTP = 0.0 V, TBB_POR = 1 and there is a valid turn-on event. Refer to the application note AN4536 for an example

of prototyping.

7.1.4

Reading OTP Fuses

As described in the previous section, the contents of the fuses are loaded to the TBBOTP registers when the following conditions

are met; VIN is valid, VDDOTP = 0.0 V, TBB_POR = 0 and FUSE_POR = 1. If ECC were enabled at the time the fuses were

programmed, the error corrected values can be loaded into the TBBOTP registers if desired. Once the fuses are loaded and a

turn-on event occurs, the PMIC will power on with the configuration programmed in the fuses. For more details on reading the

OTP fuses, see application note AN4536.

7.1.5

Programming OTP Fuses

The parameters that can be programmed are shown in the TBBOTP registers in the Extended Page 1 of the register map. The

PF0100 offers ECC as well as automated programming, or manual programming. The control registers for these functions are

located in Extended Page 2 of the register map. There are ten banks of twenty-six fuses each that can be programmed.

Programming the fuses requires an 8.25 V, 100 mA supply powering the VDDOTP pin, bypassed with 10 to 20

μF of capacitance.

For more details on programming the OTP fuses, see application note AN4536.

011

0x0B

100

0x0C

101

0x0D

110

0x0E

111

0x0F

Table 14. I2C Address Configuration

I2C_SLV_ADDR[3]

Hard Coded

I2C_SLV_ADDR[2:0]

I2C Device Address

(Hex)

MMPF0100 Datasheet(PDF) 23 Page - Freescale Semiconductor, Inc

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