Dust Networks Inc. M1030 사용자 설명서
Mote Boot Up
M1030-2 M
OTE
D
ATASHEET
D
UST
N
ETWORKS
™
9
C
ONFIDENTIAL
6.0
Mote Boot Up
6.1
Power-on Sequence
The M1030-2 mote has internal power on reset circuits that ensure that the mote will properly boot. However, for the power on
reset circuitry to function properly the external power supply must meet the timing shown in Figure 4 and specified in
Table 10.
reset circuitry to function properly the external power supply must meet the timing shown in Figure 4 and specified in
Table 10.
Figure 4 External Power Supply Timing Requirements
The following reset sequence (shown in Figure 5 and specified in Table 10) is required for external power supplies that fail to
meet the requirements above.
meet the requirements above.
Figure 5 Power-on Sequence
6.2
Inrush Current
During power on, the mote can be modeled as a lumped impedance of 1
Ω and 27
μ
F, as shown in Figure 6. With a source
impedance (R
src
) of 1
Ω, the inrush current on the mote appears as shown in Figure 7.
Figure 6 M1030 Equivalent Series RC Circuit
Table 10 Power-on Sequence
Parameter
Min
Typ
Max
Units
Comments
T
Vcc2RST
10
ms
T
VccRv1v2
485
μs