FS6500 datasheet(71/153 Pages) NXP

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NXP Semiconductors

FS6500-FS4500-ASILD

Safety power system basis chip with CAN FD and LIN transceivers

• After calibration, the new after run or wake-up values to set the counter are "after run x ECF" and "wake-up x

ECF".

12.8.3 Timer functions

• Function 1: In normal mode, count and generate a flag or an Interrupt when the counter reaches the after run

value.

• Function 2: In normal mode, count until the counter reaches the after run value and enters into low-power

mode.

• Function 3: In normal mode, count until the counter reaches the after run value and enters into low-power

mode. Once in low-power mode, count until the counter reaches the wake-up value and wakes up.

• Function 4: In low-power mode, count until the counter reaches the wake-up value and wakes up.

• Function 5: In low-power mode, count and do not wake-up unless the counter overflow occurs, or if the

device wakes up by another source (CAN, LIN, IO).

aaa-037784

timer counts

After run value reached

INTb

SPI: configure timer function 1

SPI: write after run register

SPI: write START

INTB when after run value reached

SPI: configure timer function 2

SPI: write after run register

SPI: write START

Entry in LPOFF after run value

reached

SPI: configure timer function 3

SPI: write after run register

SPI: write wake-up register

SPI: write START

Entry in LPOFF after run value

reached and wake-up when

wake-up value reached

SPI: configure timer function 4

SPI: write wake-up register

SPI: go to LPOFF

Wake-up when wake-up

value reached

SPI: configure timer function 5

SPI: go to LPOFF

Wake-up when other

wake-up event occurs (ex CAN)

FUNCTIONS

NORMAL MODE

LOW-POWER MODE (LPOFF)

timer counts

After run

value reached

Entry in low-power

mode when after run

value reached

Entry in low-power

mode when after run

value reached

No entry in low-power

mode controlled by LDT

timer counts

Wake-up

value reached

Wake-up

value reached

After run

value reached

Entry in init mode

after wake-up by timer

WAKE-UP

Entry in low-power

mode by SPI

timer counts

Entry in init mode

after wake-up by timer

Entry in init mode

after CAN wake-up

timer continues to count

WAKE-UP

Entry in low-power

mode by SPI

timer counts

WAKE-UP (ex CAN)

Function 1

Function 2

Function 3

Function 4

Function 5

Figure 55. Long duration timer functions

FS6500-FS4500-ASILD

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Product data sheet

Rev. 8 — 5 August 2024

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