EVAL STM32L4 USART RX Pin PB7 incorrect in Version 3 Manual?

[brians]

Posted on March 22, 2016 at 16:58

Rev 3 of the User Manual shows Pin 9 of CN14 to be PB7 (USART RX) in both Figure 3 and the schematic (Page77); in Table 33 it shows CN14.9 as PC3.  Where does PB7 come out to a header if at all? My USART_RX signal on JP15 pins 1 & 2 does not come up on pin 9 of CN14....and the USART is not receiving, and when I go to the manual to trace it, it's wrong!

#too-vague

[Tesla DeLorean]

Posted on March 22, 2016 at 17:08

Can you be a tad more specific about exactly what board and manual you are talking about. ST makes several dozen EVAL, DISCO and NUCLEO board families, with assorted STM32 families.

Cite the manual, link to the web page or provide the ID#

[Tesla DeLorean]

Posted on March 22, 2016 at 17:11

Crossed on the wire

This board? STM32L476G-EVAL

http://www.st.com/web/catalog/tools/FM116/CL1620/SC959/SS1532/LN1199/PF261634?icmp=pf261634_pron_pr_sep2015&sc=stm32l476g-eval

[brians]

Posted on March 22, 2016 at 17:54 Yes that's the board and the user guide at Version3 (DocID027351 Rev 3)

[brians]

Posted on March 22, 2016 at 18:06

Board is MB1144 Rev C

[brians]

Posted on April 12, 2016 at 20:08

Issue sorted - USART RX pin not connected to processor if LCD glass module is not connected....needs a link between CN14.9 and CN14.10

[Walid FTITI_O]

Posted on April 12, 2016 at 20:53

Hi smith.brian.005,

Thank you for both feedbacks. I will report them internally. Sorry for the inconvenience. -Hannibal-

Issue sorted - USART RX pin not connected to processor if LCD glass module is not connected....needs a link between CN14.9 and CN14.10

[Walid FTITI_O]

Posted on April 14, 2016 at 12:10

Hi smith.brian.005,

I confirm That the pin 9 port in Table 33 will be corrected. For the feedback on LCD glass module is already mentionned in the user manual that it is exclusive with all other features on the board. ( see 2.15.1) There

 is also a paragraph :

“The way of inserting the LCD glass module daughterboard into CN11 and CN14 headers determines two functions of LCD glass module daughterboard. In its display function, STM32L476ZGT6 terminals are routed to LCD segments. In its I/O-bridge function, they are not. Instead, they transit from one row of CN11 pins to the other and from one row of CN14 pins to the other, thanks to interconnections fitted by the LCD glass module daughterboard.

è

So, even if you do not use the LCD, the LCD daughter board has to be put in its I/O bridge function otherwise all other board feature will not be functional.

-Hannibal-