MFS5600AMBAFES datasheet(77/118 Pages) NXP

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NXP Semiconductors

FS5600

Automotive buck regulator and controller with voltage monitors and watchdog timer

18.1.7 CLOCK_CTRL register

Bit

Symbol

Description

FSS_FMOD

Frequency (triangular period) of internal 20 MHz oscillator frequency

spread spectrum.

1b'0 — 23.5 kHz

1b'1 — 94 kHz

Reset Condition — POR

FSS_EN

Internal 20 MHz oscillator frequency spread spectrum control.

1b'0 — Frequency spread spectrum disabled.

1b'1 — Frequency spread spectrum enabled.

Reset Condition — POR

3 to 0

CLK_FREQ[3:0]

Internal 20 MHz oscillator frequency selection (Unit MHz).

Applied to the oscillator only when CLK_FREQ[3:0] = NOT(NOT_

CLK_FREQ[3:0])

4b'0000 — 20

4b'0001 — 21

4b'0010 — 22

4b'0011 — 23

4b'0100 — 24

4b'0101 — NA

4b'0110 — NA

4b'0111 — NA

4b'1000 — NA

4b'1001 — 16

4b'1010 — 17

4b'1011 — 18

4b'1100 — 19

4b'1101 — NA

4b'1110 — NA

4b'1111 — NA

Reset Condition — POR

Table 62. CLOCK_CTRL register description

18.1.8 NOT_CLOCK_CTRL register

Bit

Symbol

Description

3 to 0

NOT_CLK_FREQ[3:0]

Internal 20 MHz oscillator frequency programming (Unit MHz).

4b'0000 - 4b’1111 — See CLK_FREQ[3:0] in CLK_CTRL register.

Reset Condition — POR

Table 63. NOT_CLOCK_CTRL register description

18.1.9 WATCHDOG_CTRL1 register

Bit

Symbol

Description

15 to 14

WD_ERR_LIMIT[1:0]

Watchdog error counter limit.

Applied only when WD_ERR_LIMIT[1:0] = NOT(NOT_WD_ERR_

LIMIT[1:0])

Table 64. WATCHDOG_CTRL1 register description

FS5600

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Product data sheet

Rev. 4 — 29 April 2024

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