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XE1283
For more complete information please refer to the XE8806A/XE8807A datasheet [2]. This can be found on the
website at http://www.semtech.com .
4.3
INTERNAL CONNECTIONS (API BUS)
XE1283 is not only made of an XE1203F and an XE8806A/XE8807A integrated together: it also includes internal
connections - the API bus, which reduces schematic, layout, and software development by ensuring compatibility with the
free API developed by Semtech.
These connections are illustrated in the figure below:
XE1283
XE8806A
XE8807A
XE1203F
BITJOCKEY TM
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
DATA
DCLK
PATTERN
DATAIN
EN
SCK
SI
SO
Figure 8 : XE1283 internal connections
This bus enables one to send/receive RF data through the BitJockey? and write/read the transceiver’s configuration
registers.
Notes:
Pin DATA of the XE1203F is used in unidirectional mode
Pin PD2 of the BitJockey? is used as pattern detection input
The BitJockey?’s PCM Encoder/Decoder should be programmed for NRZ data.
Port B which has miscellaneous analog capabilities is kept completely available unless a Tx/Rx antenna
switch is going to be driven.
Like all the remaining pins of both chips, the internal connections are also bonded out for debug and flexibility
purposes.
? Semtech 2005
17
www.semtech.com
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