topic Lpc4357 Can in LPC Microcontrollers

Lpc4357 Can

Newton829 — Tue, 29 Nov 2022 14:42:43 GMT

Hello All,

In the user manual of LPC4357,under CAN section .

There is a CAN_CLK register, which specifies the devision of Peripheral clock.

Similar under CAN_BT ther3 are bits for baud rate prescaler.

Can some one please explain me are these register same? As the seems to do the same job or do they serve any different purpose

2.For the calculation of Timming parameters of Can do I need to the total of both the devisor?

Thank you

xiangjun_rong — Wed, 30 Nov 2022 06:07:39 GMT

Hi,

For the CAN bus driving clock of LPC43xx, I suppose that this is the CAN clock divider map for CAN0 module:

Divider1 Divider2

BASE_APB3_CLK---[DIVVAL bits in CAN_CLK register]---[BRP bits in C_CAN0_BT register]--Tq clock

For the Divider1:

For the Divider2

For the BASE_APB3_CLK source selection, pls refer to

Hope it can help you

XiangJun Rong