hsp50214 Intersil Corporation, hsp50214 Datasheet - Page 30

• Manufacturer Part Number: hsp50214
• Description: Programmable Downconverter
• Manufacturer: Intersil Corporation

Serial Output Configuration Example 2:
It is desired to output only three data words on each serial out-
put. The I data word, followed by the Q data word, followed by
the Magnitude data word is to be output on SEROUTA. The Q
data word followed by the Magnitude data word, followed by
the one other data word to be output on SEROUTB. The
choices for the remaining data word in the SEROUTB signal
are: phase, frequency, AGC level and timing error. Table 15
illustrates how Control Word 19 should be programmed.
TABLE 15. EXAMPLE 2 SERIAL OUTPUT CONTROL SETTINGS
The serial data stream looks like:
BIT POSITION
start
I data word >
Q data word >
|r|data word >
end >
CONTROL
THE REMAINING CHOICES FOR THE THIRD LINK ON SEROUTB ARE:
WORD 19
30-28
27-25
24-21
20-18
17-15
14-12
11-9
8-6
5-3
2-0
PHASE, FREQUENCY, AGC LEVEL, AND TIMING ERROR
SEROUTA:
SEROUTA Data Source
SEROUTB Data Source
Number of Serial Word
Links in a Chain
Link following I data
Link following Q data
Link following |r| data
Link following
Link following f data
Link following AGC data
Link following Timing
Error data
FUNCTION
DATA WORD 3
DATA WORD 3
MAGNITUDE
TBD
data
SEROUTA source data = 000
Link following I data = 001
Link following Q data = 010
CONTROL WORD 19 FIELD
FIGURE 32. EXAMPLE 2 SERIAL OUTPUT DATA STREAM
(3 DATA WORDS IN EACH SERIAL OUTPUT)
CONTROL WORD 19 BITS 24-21 = 011
VALUE
TBD
XXX
XXX
XXX
XXX
BIT
000
001
011
001
010
DATA WORD 2
DATA WORD 2
RESULT
MAGNITUDE
(N/A)
(N/A)
(N/A)
(N/A)
TBD
(Q)
(Q)
(|r )
(3)
(I)
HSP50214
Q
30
As shown by this example, once Q was linked to |r| in the
SEROUTA chain, the SEROUTB chain must have |r| follow-
ing Q, if Q is selected. Figure 32 illustrates the construction
of the serial output streams. If the serial data stream was
changed to be a length of four data words, then, by default,
the SEROUTA would be whatever is selected for SEROUTB
data word 3. SEROUTB would need to identify the fourth
data word. Thus, SEROUTA and SEROUTB are not fully
independent because they share the Q data word (and by
default, the MAGNITUDE follows Q data link and whatever is
selected for data word 3 to follow MAGNITUDE data in
SEROUTB).
The other signals provided with the SEROUTA and
SEROUTB are the SERSYNC and the SERCLK. The
SERSYNC signal can be programmed in either early or late
sync mode. The sync signal is pulsed active low or active
high for each information word link of the chain of data cre-
ated using control word 19. Figure 33 shows the four possi-
ble configurations of SERSYNC as programmed using
Control word 20.
As previously discussed, Control Word 20, bits 17 and 19,
set the functionality of the LSB of each data word. These bits
may be programmed to be either a logic “0”, logic “1” or as
normal data. The fixed states are designed to allow the
microprocessor to synchronize to the serial data stream.
start
Q data word >
|r|data word >
TBD data word>
end >
SEROUTB:
DATA WORD 1
DATA WORD 1
NOTE: Once magnitude is identified to follow Q,
Q
I
it must be that way on both serial outputs.
SEROUTB source data = 001
Link following Q data = 010
Link following |r| data = TBD
CONTROL WORD 19 FIELD
SEROUTA
SEROUTB