Functional Description of the eZ430-Chronos Wrist Module
The PCB does not include an antenna; the metal frame of the Chronos module that surrounds the LCD is
used as antenna. The antenna is tuned for best performance when the Chronos module is worn or held in
hands.
Figure 4-8. eZ430-Chronos Module Front
Figure 4-9. eZ430-Chronos Module Back
Table 4-1. Estimated Battery Life (Demo Software)
Mode
Average Current
Battery Life
Shelf mode (LPM4)
2.7 µA
92.6 months
Welcome screen (LPM3)
8.9 µA
28.0 months
Time and date
9.0 µA
27.7 months
Continuous temperature measurement
10.0 µA
25.0 months
Continuous altitude measurement
18.0 µA
13.8 months
Continuous acceleration measurement
166.0 µA
1.5 months
Continuous BlueRobin RX
40.0 µA
6.2 months
Continuous SimpliciTI PPT (no button pressed)
10.0 µA
25.0 months
Continuous SimpliciTI SYNC
0.9 mA
8 days
Continuous SimpliciTI ACC
3.7 mA
2 days
1 hour per day BlueRobin RX
10.3 µA
24.2 months
1 hour per day SimpliciTI PPT (no button pressed)
9.1 µA
25.4 months
1 hour per day SimpliciTI SYNC
46.1 µA
5.4 months
1 hour per day SimpliciTI ACC
169.9 µA
1.4 months
61
SLAU292F – November 2009 – Revised October 2013
eZ430-Chronos Hardware
Copyright © 2009–2013, Texas Instruments Incorporated