drop 1501 - DEVELOPMENT ONLY, NOT IN PRODUCTION
========================
devices
 * pan1322
 * lsm303d
 * l3g3d20
gpio
 * io0 - portb1
 * io1 - portd1
 
drop 1504
========================
devices
 * pan1322 || pan1026
 * lsm303d
 * l3g3d20
gpio
 * io0 - portb1 (not usable)
 * io1 - portd1
note 
 * io0 is connected with MEMS_EN
 
drop 1506
========================
devices
 * pan1026
 * lsm9ds0
gpio
 * io0 - portd1 (old rev io1)
 * io1 - portb1 (old rev io0)
 * io2 - portr0 (old rev AM_INT1)
 * io3 - portf7 (old rev AM_INT2)
 * io4 - portf5 (old rev I2C_EN)
note
 * I2C_EN is driven by MEMS_EN now
 * lsm9ds0 act the same as lsm303d and l3g3d20