Hello. On 6x2 data pin connector (wiz750sr) for pin 6 (U_DTR0/PHY LINK) and pin 10 (485_SEL). If we are not going to use these pins , do we ground it or leave it floating ?
For (wiz750sr) pin 8 (U_DSR0 / TCP CON / HW_TRIG) , how it function or how we control it ? If jus want to use pin 8 (wiz750sr) just for HW_TRIG same as that of Wiz107sr , how it work ?
Finally. Wanted to replace Wiz107sr to Wiz750sr (TTL) , are all cmd the same ? Like for read address “LI\r\n” , hex “4c490D0A” . Do u have Wiz750sr-TTL user manual/datasheet in pdf ?
First, do not connect ground to pin6. If you don’t use this pin, It should connect floating.
Because, HW_TRIG is active low.
pin 10(485_sel) is RS-485 set pin. So If you don’t use RS-485 mode, It is fine to connect to ground.
Secondly, when you first insert power, MCU is check to the HW_TRIG status.
So, If you want to use HW_TRIG, You should set to active low HW_TRIG. and then set to reset or do it power on/off.
Hello rena. Thx for the reply. There are not much information provided in the wikipage regarding the description/functioning of data pin connector ? For example pin 6 or 10 not using , therefore leave it floating ? Pin 8 got 3 function DSR/TCP connect/HW_TRIG , not much description ?
Hello Edward . Regarding Wiz750sr (TTL). For pin 10 , can we leave it floating also if not intend to use ? And for pin 8 , when connected to mcu io’s pin and want to send cmd to read/write , we set active low. When not in use , default is it active high ?