Rev 1 Dec.10
Proprietary and Confidential - Specifications subject to change
79
6.1 Power states
The SL808X module has five power states as detailed in
Table 6-3: Miscellaneous DC power consumption
a
Signal
Description
Band
Typ
Max
Units
Notes/Configuration
VCC
Module OFF
leakage current
All bands
35
TBD
A
•
Full operating temperature range
USB transmit
current
All bands
10
b
TBD
mA
•
Full speed USB connection,
C
L
= 50 pF on D+ and D- signals
a. All measurements are preliminary values
b. Typical value for MC8790 modem used as estimate
Table 6-4: Supported GPRS / EDGE power classes
Feature
Notes
EGSM 900/GSM 850 Power Class 4
2 W 33 dBm
GSM 1800/1900 Power Class 1
1 W 30 dBm
EDGE Power Class for 850/900 MHz
Class E2
a
; 27 dBm, 0.5 W
EDGE Power Class for 800/1900 MHz Class E2
a
; 26 dBm, 0.4 W
a. E2 power class applies to 8PSK modulation.
Table 6-5: Supported SL808X power states
State
Description
Host
powered
Modem
powered
USB
interface
active
RF
enabled
Normal
(Default
state)
•
Capable of placing/receiving calls or establishing data
connections on network
•
USB interface is fully active
•
Current consumption in a call or data connection is
affected by:
·
Radio band in use
·
Tx power
·
Receive gain settings
·
Data rate
·
Number of active Tx time slots
•
Module defaults to Normal state when VCC is first applied
in the absence of POWER_ON_N control. [TBD]
Low power
•
‘Airplane’ mode—Rx/Tx are disabled; USB interface is
active
•
State entered automatically when critical
voltage/temperature thresholds are exceeded. Host
should consider powering off module to prevent damage to
unit.
Sleep
•
Normal state of module between calls or data connections.
•
Module cycles between wake (polling the network) and
sleep, at network provider-determined interval.
Summary of Contents for AirPrime SL808 Series
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