nesbit
Newbie level 1
sim340dz
Hello,
I'm beginning a project which plans to use the SIM340DZ part. But I have a few technical questions.
1) The extra pads on the bottom (VBAT, GND, RXD, TXD, DB_TX, DB_RX, pwrkey), must these be connected? They are not shown in the recommended footprint.
2) Nancy at Fanwell has said the 300D and 340D parts are pin compatible. I've only found datasheet "SIM300DZ_HW_203", is this okay to use this to develop the hardware?
3) Do the pads for RF_GND get tied to the main ground pads, or are these intentionally separate and should only go to the antenna?
4) The SIM300DZ_HW_203 document references VDD_EXT. But I can only find this defined in the SIM300 (not D) documents. Is the meaning the same?
Any information would be very helpful. SIM300DZ_HW_203 attached for reference.
Thanks!
Hello,
I'm beginning a project which plans to use the SIM340DZ part. But I have a few technical questions.
1) The extra pads on the bottom (VBAT, GND, RXD, TXD, DB_TX, DB_RX, pwrkey), must these be connected? They are not shown in the recommended footprint.
2) Nancy at Fanwell has said the 300D and 340D parts are pin compatible. I've only found datasheet "SIM300DZ_HW_203", is this okay to use this to develop the hardware?
3) Do the pads for RF_GND get tied to the main ground pads, or are these intentionally separate and should only go to the antenna?
4) The SIM300DZ_HW_203 document references VDD_EXT. But I can only find this defined in the SIM300 (not D) documents. Is the meaning the same?
Any information would be very helpful. SIM300DZ_HW_203 attached for reference.
Thanks!