EVAL-CONTROLBRD2 AD [Analog Devices], EVAL-CONTROLBRD2 Datasheet - Page 22

• Manufacturer Part Number: EVAL-CONTROLBRD2
• Description: Differential Input, 1MSPS, 12-Bit ADC in ?SO-8 and S0-8
• Manufacturer: AD [Analog Devices]

PRELIMINARY TECHNICAL DATA
AD7450
*
AD7450*
MC68HC16*
SCLK
SCLK/PMC2
SDATA
MISO/PMC0
SS/PMC3
*ADDITIONAL PINS OMITTED FOR CLARITY
Figure 27. Interfacing to the MC68HC16
AD7450 to DSP56xxx
The connection diagram in figure 28 shows how the
AD7450 can be connected to the SSI (Synchronous Serial
Interface) of the DSP56xxx family of DSPs from
Motorola. The SSI is operated in Synchronous Mode
(SYN bit in CRB =1) with internally generated 1-bit clock
period frame sync for both Tx and Rx (bits FSL1 =1 and
FSL0 =0 in CRB). Set the word length to 16 by setting
bits WL1 =1 and WL0 = 0 in CRA. To implement the
power-down mode on the AD7450 then the word length
can be changed to 8 bits by setting bits WL1 = 0 and WL0
= 0 in CRA. It should be noted that for signal processing
applications, it is imperative that the frame
synchronisation signal from the DSP56xxx will
provideequidistant sampling.
*
AD7450*
DSP56xxx*
SCLK
SCLK
SDATA
SRD
SR2
*ADDITIONAL PINS OMITTED FOR CLARITY
Figure 28. Interfacing to the DSP56xx
REV. PrJ
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