Technical data

Table of Figures
Figure 1: Main Blocks in a Wireless System (embedded application).................................... 15
Figure 2: Main Blocks in a Wireless System (external micro-controller) ............................... 16
Figure 3: Wireless CPU® viewed from below ....................................................................... 26
Figure 4: Wireless CPU®, viewed from above (Integrated SIM holder variant) ....................... 26
Figure 5: Antenna pig-tail pads ......................................................................................... 27
Figure 6: Dimensions of the Wireless CPU® (Integrated SIM variant) .................................... 28
Figure 7: Dimensions of the Wireless CPU® (Legacy variant)................................................ 29
Figure 8: Wireless CPU®, viewed from underneath .............................................................. 30
Figure 9: Common level translator circuitry using MAX3001............................................... 36
Figure 10: AREF implementation example for AUXI and AUXO ............................................ 38
Figure 11: Level translator arrangement............................................................................. 41
Figure 12: GR64 Charger Implementation .......................................................................... 44
Figure 13: Typical application for pulse charging a battery................................................. 45
Figure 14: Power On timing for GR64001........................................................................... 49
Figure 15: Power Off timing for GR64001........................................................................... 51
Figure 16: Auxiliary input connections to the Wireless CPU® .............................................. 54
Figure 17: Auxiliary output connections to the Wireless CPU® ............................................ 55
Figure 18: Microphone input connections to the Wireless CPU®.......................................... 56
Figure 19: EAR output connections to the Wireless CPU®.................................................... 57
Figure 20: PCM audio path................................................................................................. 58
Figure 21: 13-bit GSM voice embedded in 16-bit PCM Frame............................................. 59
Figure 22: PCM Frame format for a single transfer ............................................................. 59
Figure 23: PCM Frame format for a continuous transfer...................................................... 60
Figure 24: SERVICE Pin Interface......................................................................................... 70
Figure 25: Recommended circuit for a Buzzer implementation ........................................... 71
Figure 26: Recommended circuit for an LED implementation .............................................. 72
Figure 27: ADC sharing arrangement ................................................................................. 76
Figure 28: Recommended circuitry for a TX_ON implementation ........................................ 80
Figure 29: VRTC connection............................................................................................... 82
Figure 30: RF Antenna Pad Dimensions .............................................................................. 84
Figure 31: Thickness of Wireless CPU® variant without SIM holder...................................... 95
Figure 32: Thickness of Wireless CPU® variant with SIM holder........................................... 95
GR64 Integrators’ Manual
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