Atech OEM Inc. WM100X User Manual

    iWEM-1000UM, Dec 30, 2010

 

7F, AAEON Building, No.43, Sec. 4, Keelung Rd, Taipei City 10607, Taiwan (R.O.C.) 

Tel: +886-2-2377-0282 

Fax: +886-2-2377-0283 

http://www.atechoem.com/

 

There are 2 ways to power iWEM-1000 up. One is to use the 2.0V to 3.3VDC input circuit. The other one is 

to use 3.0 to 3.7VDC input circuit. Only one power input circuit needs to be connected. 

 

2.0 to 3.3VDC power supply circuits are designed to power iWEM-1000 with 2 standard Ni-Cd or Ni-MH 

batteries. To use this configuration, apply battery = 2.0 to 3.3VDC to VBATT (pin 20). Let V3.3IN (pin 21) 

floating. Tie pin 17 to pin 18. (This enables the on board battery boost 3.3V switcher). There is a built in 

voltage brownout monitor which will shut down the chip when the voltage drops below 2.0 VDC. The 

following picture shows the application circuits to use the 2.0 to 3.3VDC power supply. 

 

 

 

3.0 to 3.7VDC power supply circuits are designed to power iWEM-1000 with standard 3.3VDC power or a 

rechargeable Lithium battery. To use this configuration, apply 3.3 VDC power to VBATT (pin 20), and 

V3.3IN (pin 21). Tie 3.3VREG-IN (pin 18) to GROUND. Let 3.3V-REG-OUT (Pin 17) floating. Do NOT 

exceed the voltage ratings on the 3.3V pins, damage to the module will result. The following picture shows 

the application circuits to use the 3.0 to 3.7VDC power supply.