Compal Electronics Inc PICONODE Manual De Usuario
PicoNode Integration Specification
5
3 Electrical Interface
This chapter describes the electrical interface of the picoNode and how the Host processor controls for
the picoNode.
the picoNode.
Table 5 picoNode Pin Descriptions
Pin #
Pin Name
Signal Direction
Relative to picoNode
Relative to picoNode
Signal Type
Comment
2
WAKE
Output, 1.8V
CMOS_O*
This is a 1.8V output signal that
reflects the status of the Node’s
power state. When WAKE is “high”
the Node is active in Idle, RX, or TX
states. When WAKE is “low”, the
Node’s 3.3V is internally gated OFF
and the Node is in its lowest power
state. This signal is to be used for
“battery operating modes”, as
describe in Figure 6 Lithium Battery
Example.
Connect the WAKE pin directly to
the enable pin of a voltage regulator
or FET switch controlling 3.3V
reflects the status of the Node’s
power state. When WAKE is “high”
the Node is active in Idle, RX, or TX
states. When WAKE is “low”, the
Node’s 3.3V is internally gated OFF
and the Node is in its lowest power
state. This signal is to be used for
“battery operating modes”, as
describe in Figure 6 Lithium Battery
Example.
Connect the WAKE pin directly to
the enable pin of a voltage regulator
or FET switch controlling 3.3V
1,3,4,5,7,10,12,
14,18,24,26,28,
29,30,31,32,34
14,18,24,26,28,
29,30,31,32,34
Ground
Power
Power
Ground return. Should be low RF
impedance to a solid ground plane
of the Host
impedance to a solid ground plane
of the Host
23
3V3
Power
Power
The 3.3V can be continuously
supplied(line powered) or only when
the WAKE pin is asserted
“high”(battery powered). This
power domain is high power
(internal CPU, Transceiver, and RF
PA) and should be decoupled with a
low ESR, high capacitance
Capacitor.
supplied(line powered) or only when
the WAKE pin is asserted
“high”(battery powered). This
power domain is high power
(internal CPU, Transceiver, and RF
PA) and should be decoupled with a
low ESR, high capacitance
Capacitor.
15
VBATT
Power
Power
Input power to the picoNode. This
power domain is low current but is
used 100% of the time to supply
internal Supervisory domains.
power domain is low current but is
used 100% of the time to supply
internal Supervisory domains.