# WP7607-1 no RESET\_OUT\_N pulse on reboot

**URL:** <https://forum.legato.io/t/wp7607-1-no-reset-out-n-pulse-on-reboot/3588>\
**Category:** Legato Linux distribution (Yocto project)\
**Created:** [August 24, 2018, 12:39pm UTC](https://forum.legato.io/t/wp7607-1-no-reset-out-n-pulse-on-reboot/3588 "2018-08-24T12:39:23Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jlu](https://avatars.discourse-cdn.com/v4/letter/j/34f0e0/32.png) [@jlu](https://forum.legato.io/u/jlu)\
**Post date:** [August 24, 2018, 12:39pm UTC](https://forum.legato.io/t/wp7607-1-no-reset-out-n-pulse-on-reboot/3588/1 "2018-08-24T12:39:23Z")

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We are developing a custom board using a WP7607-1. The board also has a USB3503 and LAN9500A chips. When doing a warm reset (doing a reboot in the shell), the RESET\_OUT\_N pin is not toggled after reset. This causes the USB chips not to initialize after a reboot. When I insert a WP7502 into the second instead, it works. I can confirm this by seeing a 100-200 ms pulse on the RESET\_OUT\_N pin. Is this something that isn’t implemented yet in the WP7607-1 firmware? I’m running the latest firmware version:

Device: WP7607-1  
IMEI: x  
IMEISV: 4  
FSN: x  
Firmware Version: SWI9X07Y\_02.16.02.00 000000 jenkins 2018/04/19 19:59:02  
Bootloader Version: SWI9X07Y\_02.16.02.00 000000 jenkins 2018/04/19 19:59:02  
MCU Version: 002.009  
PRI Part Number (PN): 9907364  
PRI Revision: 001.003  
Carrier PRI Name: GENERIC  
Carrier PRI Revision: 002.032\_000  
SKU: 1103529  
Last Reset Cause: Power Down  
Resets Count: Expected: 65 Unexpected: 19

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**Author:** ![plu](https://avatars.discourse-cdn.com/v4/letter/p/e19b73/32.png) [@plu](https://forum.legato.io/u/plu)\
**Post date:** [August 28, 2018, 8:10am UTC](https://forum.legato.io/t/wp7607-1-no-reset-out-n-pulse-on-reboot/3588/2 "2018-08-28T08:10:10Z")

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HI jlu,  
this topic should be addressed into the forum dedicated to the WP products.  
can you open it there  
here is the link [https://forum.sierrawireless.com/c/airprime-embedded-wireless-modules/wp-series](https://forum.sierrawireless.com/c/airprime-embedded-wireless-modules/wp-series)

Best regards,

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**Author:** ![jlu](https://avatars.discourse-cdn.com/v4/letter/j/34f0e0/32.png) [@jlu](https://forum.legato.io/u/jlu)\
**Post date:** [August 28, 2018, 1:55pm UTC](https://forum.legato.io/t/wp7607-1-no-reset-out-n-pulse-on-reboot/3588/3 "2018-08-28T13:55:50Z")

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Thanks, I’ve asked the question there.

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**Author:** ![plu](https://avatars.discourse-cdn.com/v4/letter/p/e19b73/32.png) [@plu](https://forum.legato.io/u/plu)\
**Post date:** [September 11, 2018, 2:47pm UTC](https://forum.legato.io/t/wp7607-1-no-reset-out-n-pulse-on-reboot/3588/4 "2018-09-11T14:47:35Z")

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