Control Interface; Serial Memory; Baseband Interfacing - CML Microcircuits PE0601 Series User Manual

Evaluation Kit for CMX7x6x
As an alternative to the 19.2MHz oscillator a more accurate TCXO could be used with the
following component changes:
Reference
Designator
U13
C15
R21
R22
R23
U5
[1]
Note , if required allows adjustment from CMX7x6x AuxDAC3 – if supported by the FI being
evaluated.
Additionally, a 32,768Hz crystal is fitted to the CMX7x6x low power oscillator.
6.1.3

Control Interface

The C-BUS and CMX7x6x boot control signals are brought out on connector J10. This is a right
angle male header designed to plug directly into the PE0002 interface card's matching female
header.
Alternatively, if not using the PE0002, the CMX7x6x boot control signals can be manually set with
jumpers JP1 and JP2.
6.1.4

Serial Memory

The serial memory, U1, can be used for non-volatile storage of a Function Image™. The PE0601
is shipped with a blank serial memory.
The chip select signal for the serial memory is provided by the SSOUT0 signal from the CMX7x6x
device. If the serial memory is not required, this signal, or the GPIO15 option of the same pin, can
be used for another purpose by moving the 0 ohm link from position R69 to position R68. The
signal GPIO15/SSOUT0 is then avaliable at connector J7, and also J11 if a jumper is inserted
across J14 pin 19 and 20.
6.1.5

Baseband Interfacing

The availability and usage of these signals are Function Image
The CMX7x6x differential I and Q inputs are fed through a RC network. Specific requirements for
this network are FI dependent. Differential signals can be input to the RC networks at header,
J24. CML evaluation kits for RF receiver products have matching headers, but the I or Q signal
polarity must be observed. Alternatively, check Function Image™ documentation for the
possibility of a programmable signal inversion.
The CMX7x6x differential I and Q outputs are fed through a RC network. Specific requirements
for this network are FI dependent. The differential signals output from the RC networks can be
monitored at header, J19. CML evaluation kits for RF transmitter products have matching
headers, but the I or Q signal polarity must be observed. Alternatively, check Function Image™
documentation for the possibility of a programmable signal inversion.
© 2011 CML Microsystems Plc
Action Description
Remove -
Fit 100nF 0603
Fit 18kohm 0603
[1]
Fit 0R 0603
Fit 15kohm 0603
Fit Golledge GTXO-83 series TCXO, or similar
Table 6 – TCXO Component Changes
23
TM
dependent.
PE0601-xxxx
UM0601/2