# WP7607-1 no RESET\_OUT\_N pulse on reboot **URL:** \ **Category:** WP Series\ **Created:** [August 28, 2018, 1:44pm UTC](https://forum.sierrawireless.com/t/wp7607-1-no-reset-out-n-pulse-on-reboot/13664 "2018-08-28T13:44:00Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![jeroenlukas](https://avatars.discourse-cdn.com/v4/letter/j/edb3f5/32.png) [@jeroenlukas](https://forum.sierrawireless.com/u/jeroenlukas)\ **Post date:** [August 28, 2018, 1:44pm UTC](https://forum.sierrawireless.com/t/wp7607-1-no-reset-out-n-pulse-on-reboot/13664/1 "2018-08-28T13:44:00Z")
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 socketinstead, 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 ---
**Author:** ![LChing](https://avatars.discourse-cdn.com/v4/letter/l/ac8455/32.png) [@LChing](https://forum.sierrawireless.com/u/LChing)\ **Post date:** [October 23, 2018, 10:47am UTC](https://forum.sierrawireless.com/t/wp7607-1-no-reset-out-n-pulse-on-reboot/13664/2 "2018-10-23T10:47:30Z")
Hi I think WP7607-1 & WP7502 are using different baseline. For WP7607-1 “RESET\_OUT\_N” pin is multi function pin. For example Dual SIM Switch System will use this pin. You are better to another GPIO for it. Force it become GPIO6.