Hello,
I’d like to report what looks like a significant error in the LPC553x Reference Manual (Rev. 4), Table 315 “SCT0 signals (outputs)” when compared to the Data Sheet, Table 3, and ask which source is authoritative.
This is LPC553x Reference Manual, Rev. 4, Table 315 "SCT0 signals (outputs)":
There are 34 external pins listed in this table (if I counted correctly). A quick search through the LPC553x Data Sheet finds only 31 pins. Further, Table 315 lists PIO2_2, PIO2_9, PIO2_15, PIO2_30 and PIO2_31 as SCT0 output pins. As far as I can tell from the Data Sheet, the LPC553x only implements PIO2_0 and PIO2_1, so those Port-2 pins do not exist on this device.
Now, if you meticulously go through Table 3 of the data sheet and extract all SCT0_OUT pins, then you end up with a completely different table:
SCT0 signals (outputs) Connect to
| SCT0_OUT0 | PIO0_2, PIO0_17, PIO1_4, PIO1_23 |
| SCT0_OUT1 | PIO0_3, PIO0_18, PIO1_8, PIO1_24 |
| SCT0_OUT2 | PIO0_10, PIO0_15, PIO0_19, PIO1_9, PIO1_25 |
| SCT0_OUT3 | PIO0_22, PIO0_31, PIO1_10, PIO1_26 |
| SCT0_OUT4 | PIO0_23, PIO1_3, PIO1_17 |
| SCT0_OUT5 | PIO0_26, PIO1_18 |
| SCT0_OUT6 | PIO0_6, PIO0_27, PIO1_31 |
| SCT0_OUT7 | PIO0_21, PIO0_28, PIO1_19 |
| SCT0_OUT8 | PIO0_29, PIO1_13 |
| SCT0_OUT9 | PIO0_30 |
For my design I am using the datasheet Table 3 as the source of truth.
Please,
- confirm that the Data Sheet (Rev 5.0) Table 3 is the authoritative source for SCT0 output pins,
- confirm that table 315 of Reference Manual is incorrect,
- confirm that my table above is correct.
Thanks.
Dan
Hello,
Please use the "Pin Function Table" attached in the Reference Manual to identify the available pins for SCT0_OUT functionality.
Best Regards
Hello,
For now, please reference to Pin Function Table.
I pass the information to the team.
Best Regards, Luis
Hello @luis_maravilla ,
Thank you for pointing to the "Pin Function Table". I did not know that a spreadsheet file had been hidden inside the Reference Manual.
I had a quick glance at the "Pin Function Table" and it confirms that the information in Table 315 "SCT0 signals (outputs)" in the Reference Manual is incorrect.
Could you please pass this information on to the documentation team for correction?
In case there are further discrepancies regarding pin functions, what is the authoritative source, the Data Sheet or the Pin Function Table?
Thanks.
Best regards,
Daniel