Specifications

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 Ta bl e 6- 5 .
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.
   