Specifications

AirPrime Embedded Module Hardware Integration Guide
20 Proprietary and Confidential 2130114
Voltage monitoring state machine
Figure 2-2 illustrates the state machine used to monitor the VCC supply, and
Tabl e 2- 1 details the voltage conditions that trigger state changes.
Figure 2-2: Voltage monitoring state machine
Normal
Low Supply Voltage
Critical
(Low power mode)
Low Supply Voltage
Warning
High Supply Voltage
Critical
(Low power mode)
current_vcc > VOLT_LO_NORM
current_vcc < VOLT_LO_WARN
current_vcc > VOLT_LO_NORM
Host asserts
W_Disable#
Host asserts
W_Disable#
current_vcc
< VOLT_LO_CRIT
current_vcc > VOLT_HI_CRIT
current_vcc < VOLT_HI_NORM
Power off.
Handled by
Power State
state machine.
Table 2-1: Voltage trigger levels
Condition
Voltage (V)
VCC3.3 (3.0 V–3.6 V) VCC3.8 (3.4–4.2)
MC57xx
MC8775/75V
MC8780
MC8781
MC8700
MC8790/90V
MC8791V
MC8792V
MC8795V
MC8201
VOLT_HI_CRIT 3.6 3.6 3.8 4.4
VOLT_HI_NORM 3.5 3.5 3.5 4.2
VOLT_LO_NORM 3.1 3.1 3.1 3.4
VOLT_LO_WARN 3.0 3.0 3.05 3.2
VOLT_LO_CRIT 2.9 2.9 3.00 3.1