User's Manual

Electrical
MOTOROLA Hardware 4-13
Preliminary
The following table shows the current consumption measurements of the circuits of the MC72000
Bluetooth Baseband Controller and Transceiver IC.
Note that the table contains typical values.
4.4.1 Power Supply
The board is fed with power from on-board standard regulators.
The on-board power supply regulators should be fed with the supply provided, which generates the
following voltages for the board:
•1.85 V
•2.65 V
•3.0V
4.4.2 Reset Circuit
The board includes a push button for full system reset of the MC72000 and all peripherals.
4.4.3 Clocks
The clocks in the system are as follows:
• External crystal: 13 MHz
• Sleep mode clock: 32.768 kHz
• Active mode clock: 24 MHz
The MC72000 includes an internal oscillator circuit for the 32.768 kHz sleep mode clock and the 24 MHz
active mode clock. Only two external crystals and a few other components are needed.
Table 1: Current Consumption Measurements of MC72000
Type
Average
Current
Description
DH5 asymmetric
RX
57 mA TX rate 57.6 kbits
RX rate 723.2 kbits
DH5 asymmetric
TX
55.5 mA TX rate 723.2 kbits
RX rate 57.6 kbits
DH5 symmetric 57.5 mA TX rate 433.9 kbits
RX rate 433.9 kbits
HV1 54.8 mA
HV3 TDB
Total system in
low-power mode
TDB