MPC18730EPR2 datasheet(25/35 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

18730

FUNCTIONAL DEVICE OPERATION

LOGIC COMMANDS AND REGISTERS

Ext / Int: Clock Select control 1

1 = External Clock

0 = Internal Clock

2FS: Clock Select control 2

1 = 2FS on

0 = 2FS off

RSTB Sleep: RSTB Sleep Monitor

1 = RSTB SLEEP Monitor off

0 = RSTB SLEEP Monitor on

S_Off_VG: VG Top side transistor off

1 = Synchronous Rectification Off

0 = Synchronous Rectification On

VG_Duty[3]: VG Duty Control MSB

1 = VG Duty[3] is high

0 = VG Duty[3] is low

VG_Duty[2]: VG Duty Control Bit 2

1 = VG Duty[2] is high

0 = VG Duty[2] is low

VG_Duty[1]: VG Duty Control Bit1

1 = VG Duty[1] is high

0 = VG Duty[1] is low

VG_Duty[0]: VG Duty Control LSB

1 = VG Duty[0] is high

0 = VG Duty[0] is low

VG is controlled by PFM method. This register can change

the duty by 16 steps.

Refer to Table 15, VGATE Duty Settings on page 23 for

the correspondence between the VG Duty maximum values

and register settings.

VO1_SENSE[6]: Reference DAC MSB

1 = VO1_SENSE[6] on

0 = VO1_SENSE[6] off

VO1_SENSE[5]: Reference DAC Bit5

1 = VO1_SENSE5] on

0 = VO1_SENSE[5] off

VO1_SENSE[4]: Reference DAC Bit4

1 = VO1_SENSE[4] on

0 = VO1_SENSE[4] off

VO1_SENSE[3]: Reference DAC Bit3

1 = VO1_SENSE[3] on

0 = VO1_SENSE[3] off

VO1_SENSE[2]: Reference DAC Bit2

1 = VO1_SENSE[2] on

0 = VO1_SENSE[2] off

VO1_SENSE[1]: Reference DAC Bit1

1 = VO1_SENSE[1] on

0 = VO1_SENSE[1] off

VO1_SENSE[0] on

0 = VO1_SENSE[0] off

S_Off_VO1_SENSE: DDC1 Top side (Ni_mh) / Bottom

side (Li_ion) transistor off

1 = Synchronous Rectification Off

0 = Synchronous Rectification On

Refer to Table 10, Output Voltage of VO1_SENSE on

page 19 for the correspondence between the output voltage

and register settings.

Table 19. Clock Select Register

0010

Data1

Data2

Bit

Name

Ext/Int

Half Freq

RSTB sleep

S_Off_VG

VG_Duty [3]

VG_Duty[2]

VG_Duty[1]

VG_Duty[0]

Default

Table 20. VO1_SENSE Output Voltage Register

0011

Data1

Data2

Bit

Name

VO1_SENSE

[6]

VO1_SENSE

[5]

VO1_SENSE

[4]

VO1_SENSE

[3]

VO1_SENSE

[2]

VO1_SENSE

[1]

VO1_SENSE

[0]

S_Off_VO1_SENSE

Default

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