topic electrical specification of CAN_RXD and CAN_TXD in LPC Microcontrollers

electrical specification of CAN_RXD and CAN_TXD

lpcware — Wed, 15 Jun 2016 19:34:12 GMT

Content originally posted in LPCWare by robert on Thu Aug 22 08:35:52 MST 2013
Dear NXP,
About the two pin:CAN_RXD and CAN_TXD,there is two questions need you help to confrom, as below:
1.input voltage range;
2.the drive ability.
Thanks.

Re: electrical specification of CAN_RXD and CAN_TXD

lpcware — Wed, 15 Jun 2016 19:34:13 GMT

Content originally posted in LPCWare by Wouter on Thu Aug 22 09:17:06 MST 2013
Hi Robert,

CAN_RXD and CAN_TXD are standard I/O's. The device datasheet lists these values:
1. Table 12 specifies an absolute maximum rating for I/O pin of -0.5 to 5.5V. Note that it's only 5V tolerant when the VDD supply voltage is present.
2. Table 16 specifies a high-level output current of 4mA.

Note that CAN_RXD and CAN_TXD are only available on LPC11Cxx devices which do not have the CAN transceiver integrated. LPC11Cxx devices with CAN transceiver integrated have a CANH and CANL pin. The characteristics of these two pins are specified in the TJF1051 datasheet: http://www.nxp.com/documents/data_sheet/TJF1051.pdf

Regards,
Wouter

Re: electrical specification of CAN_RXD and CAN_TXD

lpcware — Wed, 15 Jun 2016 19:34:13 GMT

Content originally posted in LPCWare by robert on Fri Aug 23 02:37:44 MST 2013
Dear Wouter,
Do the CANH and CANL pin of LPC11C2x equals CANH and CANL pin of TJF1051?
Do that means LPC11C2x integraed TJF1051?
Or could you provide the CANH and CANL pin SPEC of LPC11C2x directly?
1.the common mode voltage and input voltage range;
2.the drive ability.

Many thanks.

Re: electrical specification of CAN_RXD and CAN_TXD

lpcware — Wed, 15 Jun 2016 19:34:14 GMT

Content originally posted in LPCWare by Wouter on Fri Aug 23 02:52:57 MST 2013
Hi Robert,

That's correct, the LPC11C2x has the TJF1051 integrated.

Regards,
Wouter