MCP16502 datasheet(49/86 Pages) MICROCHIP

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DS20006275D-page 49

MCP16502

OUT1-CFG: BUCK1 CONFIGURATION (0x15)

R/W-1

R/W-0

R/W-1

R/W-0

FLTMSK

HCPEN

DISCH

PHASE

DVSR[1:0]

REN

RCON

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7

FLTMSK: Fault Masking bit

If this bit is ‘1’, it will prevent nINTO from being asserted low upon FLT = 1.

bit 6

HCPEN: Short-Circuit Protection Hiccup Mode Enable bit

If HCPEN = 1, a short-circuit event will cause a Hiccup mode response with unlimited soft start

retries, without shutting down the other channels.

If HCPEN = 0, a short-circuit event on the channel will cause immediate shutdown of ALL channels

and a new start-up sequence will automatically be attempted after a 100 ms delay.

bit 5

DISCH: Active Output Discharge Control bit

DISCH = 1 enables active output discharge when channel is turned off; DISCH = 0 disables it.

bit 4

PHASE: Regulator Phase Control bit

Set bit to ‘1’ for regulator to operate 180° out of phase with the oscillator; clear bit to ‘0’ for regulator

to operate in phase with the oscillator.

bit 3-2

DVSR[1:0]: Dynamic Voltage Scaling Rate bits

Dynamic Voltage Scaling rate programming bits.

bit 1

REN: Register Enable bit

Used in combination with RCON. If RCON = 0, the value of REN has no effect. If RCON = 1, setting

REN = 1 enables channel and REN = 0 disables it, regardless of the current status.

Mode of operation (FPWM or Auto-PFM) is still controlled by the MODE bits.

bit 0

RCON: Register Enable Control bit

Used in combination with the REN bit.

OUT2-A: BUCK2 ACTIVE MODE (0x20)

R/W-1

R/W(1)

MODE

VSET[5:0]

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7

EN: Enable in Active Status bit

If EN = 0, the regulator is enabled.

bit 6

MODE: Mode in Active Status bit

If MODE = 1, then the Buck will run in FPWM, else if MODE = 0, then the Buck will run in Auto-PFM.

bit 5-0

VSET[5:0]: Output Voltage Selection for Active Status bits

Default is pin-selectable.

Note 1: Default is pin-selectable.

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