AN2707 Freescale Semiconductor / Motorola, AN2707 Datasheet - Page 10

• Manufacturer Part Number: AN2707
• Description: Software Drivers for Tango3 RF Transmitter and Romeo2 RF Receiver ICs
• Manufacturer: Freescale Semiconductor / Motorola

AN2707
10
Software Drivers for Tango3 RF Transmitter and Romeo2 RF Receiver ICs
Required
Optional
MCU
Timer channel
Timer clk in
A description of each connection between the MCU and Tango3 is given below.
DATA — The data to be transmitted over the RF link is passed to Tango3 on
this line. It is encoded using Manchester encoding, as defined in the Tango3
datasheet, to be compatible with Romeo2's data manager. This data is
generated using a timer channel on the MCU.
ENABLE — When this signal is at logic 1, the Tango3 IC is enabled and can
transmit data. When this signal is logic 0, Tango3 is disabled and placed in a
low power consumption mode.
DATACLK — This signal allows Tango3 to provide the MCU with an accurate
clock signal, which can be used as an accurate timebase for generating data
bits for transmission. This is useful with MCUs that use a low-accuracy clock
source, such as, for example, an RC oscillator. When Tango3 is enabled
(ENABLE = 1), DATACLK is active; when Tango3 is disabled (ENABLE = 0),
DATACLK is at logic 0.
The software driver can be configured to use or ignore DATACLK.
I/O pin
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 8. Tango3 Interface to MCU
DATACLK, MODE and BAND connections to MCU are optional
Go to: www.freescale.com
TANGO Interface to MCU
DATACLK
ENABLE
DATA
3V
BAND
MODE
Tango
RFOUT
MOTOROLA