MMPF0200Z datasheet(22/118 Pages) NXP

22 / 118 page

Analog Integrated Circuit Device Data



Freescale Semiconductor

PF0200Z

Functional Block Requirements and Behaviors

Start-up

6.1.2.1

Start-up Sequence and Timing

Each regulator has 5-bits allocated to program its start-up time slot from a turn on event; therefore, each can be placed from

position one to thirty-one in the start-up sequence. The all zeros code indicates that a regulator is not part of the start-up

sequence and will remain off. See Table 10. The delay between each position is equal; however, four delay options are available.

See Table 11. The start-up sequence will terminate at the last programmed regulator.

6.1.2.2

PWRON Pin Configuration

The PWRON pin can be configured as either a level sensitive input (PWRON_CFG = 0), or as an edge sensitive input

(PWRON_CFG = 1). As a level sensitive input, an active high signal turns on the part and an active low signal turns off the part,

or puts it into Sleep mode. As an edge sensitive input, such as when connected to a mechanical switch, a falling edge will turn

on the part and if the switch is held low for greater than or equal to 4.0 seconds, the part will turn off or enter Sleep mode.

6.1.2.3

I2C Address Configuration

The I2C device address can be programmed from 0x08 to 0x0F. This allows flexibility to change the I2C address to avoid bus

conflicts. Address bit, I2C_SLV_ADDR[3] in OTP_I2C_ADDR register is hard coded to “1” while the lower three LSBs of the I2C

address (I2C_SLV_ADDR[2:0]) are programmable as shown in Table 13.

Table 10. Start-up Sequence

SWxx_SEQ[4:0]/

VGENx_SEQ[4:0]/

VREFDDR_SEQ[4:0]

Sequence

00000

Off

00001

SEQ_CLK_SPEED[1:0] * 1

00010

SEQ_CLK_SPEED[1:0] * 2

11111

SEQ_CLK_SPEED[1:0] * 31

Table 11. Start-up Sequence Clock Speed

SEQ_CLK_SPEED[1:0]

Time (

s)

500

1000

2000

4000

Table 12. PWRON Configuration

PWRON_CFG

Mode

PWRON pin HIGH = ON



PWRON pin LOW = OFF or Sleep mode

PWRON pin pulled LOW momentarily = ON



PWRON pin LOW for 4.0 seconds = OFF or Sleep mode

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