All KC Wirefree Bluetooth modules. KC20, KC21, KC11
Shipments received after February 2006 will require the RESET pin
to be pulled high (3.0v preferred, up to 5v tolerance). A resistor
value from 1K to 10K ohms is recommended for this purpose.
RESET pins are located as follows:
KC20, KC21, KC11 OEM modules - Pin 3.
KC22 OEM module - Pin 10.
While previous versions of the RESET pin on the Broadcom Bluetooth
chip were internally pulled high, and could be left non-connected if
unused, revision 2.9 of the ZV43 chip does not adequately hold this
RESET pin high, and can result in intermittent failure and/or non-function
of the device.
Note: There are three methods to reset the Bluetooth device including
module power-up, software reset, and 5ms low pulse on the RESET pin.