Specifications

Product Technical Specification & Customer Design Guidelines
34 Proprietary and Confidential - Contents subject to change 4114634
Control interface (Signals)
The MC7304 provides signals for:
• Waking the host when specific events occur
• Host control of the module’s radios
• LED driver output
These signals are summarized in Table 3- 5 and paragraphs that follow.
WAKE_N — Wake host
Note: WAKE_N signal
support is optional.
The module uses WAKE_N to wake the host when specific events occur. (Support
for this signal is firmware-dependent. Contact your Sierra Wireless account
representative to determine specific availability.)
The host must provide a 5 k–100 k pullup resistor that considers total line
capacitance (including parasitic capacitance) such that when WAKE_N is
deasserted, the line will rise to 3.3 V (Host power rail) in < 100 ns.
See Figure 3-5 on page 34 for a recommended implementation.
Figure 3-5: Recommended WAKE_N connection
Table 3-5: Module control signals
Name Pin Description
Type
1
1. OC—Open Collector; PU—Digital pin Input, internal pull up
WAKE_N 1 Wake host OC
W_DISABLE_N 20 Wireless disable (Main RF) PU
WAN_LED_N 42 LED driver OC
Control
R
WAKE_N
1
2
3
Q
5k-100k
Host
VCC
MiniCard