Rainbow Electronics RC1290 - Manual (Page 7)

RC1240/1280/1290
 2005 Radiocrafts AS RC1240/RC1280/RC1290 Data Sheet (rev. 1.3) Page 7 of 17
Timing Information
The figure and table below shows the timing information for the module when changing
between different operating states.
The IDLE state is the normal state where the module search for preamble on the air and wait
for a character to be received on the UART. RXD is the state when receiving characters from
the host filling up the internal buffer. TX state is when the data is transmitted on the air. RX
state is when data is received from the air after a preamble detection. TXD is the state where
the received data is sent to the host on the UART.
CONFIG is the state entered by asserting the CONFIG pin and used during parameter
configuration, while MEMORY CONFIG is the sub-state entered by the ‘M’ command where
the configuration memory is being programmed.
IDLE TX
t
RXD-TX
First character on
UART RXD
IDLE
t
TX-IDLE RXD
t
PACKET_TIMEOUT
Last character on
UART RXD
t
TX
IDLE TXD
t
RX-TXD
Preamble detected
IDLE
t
TXD-IDLE RX
First character on
UART TXD
t
TXD
Last character on
UART TXD
t
RXD-CTS