hsp50216 Intersil Corporation, hsp50216 Datasheet - Page 38

• Manufacturer Part Number: hsp50216
• Description: Four-channel Programmable Digital Downconverter
• Manufacturer: Intersil Corporation

P(31:0)
21:20
19:16
15:12
11:0
Magnitude output scale factor. The magnitude output of the cartesian to polar coordinate conversion has bits weighted as:
2
The gain in the conversion is 0.82338. When using 16 bits, the range is such that the LSB has a weight of 0.00007 and the maximum
output is 2.32, both after the conversion gain. This corresponds to an I/Q vector length of -83dBFS to +3dBFS. These control bits
add gain (with saturation) for more resolution at the bottom of the scale. A code of 00 passes the magnitude unchanged, 01 shifts
the magnitude up one bit position’ 10 shifts by 2 positions and 11 shifts up three positions. The resulting bit weights and range (after
conversion gain) for the unsigned numbers are:
Code
00
01
10
11
The upper limits on codes 00 and 01 are the same, but 01 has no leading zero.
Serial data output SD1 routing mask. 0 disables. 1 enables.
Bit
16
17
18
19
Serial data output SD2 routing mask. 0 disables. 1 enables.
Bit
12
13
14
15
Output hold-off delay. This parameter adds additional delay from the output of the filter compute engine to start of the serial output
stream for multiplexing channels. Load with the desired delay (0 = zero, 1 = one, 2 = two, etc.).
(2 1 0.-1 -2 -3 -4 . . . )
Bit Weights
2 1 0 -1 -2 . . . -11 -12 -13
1 0 -1 -2 -3 . . . -12 -13 -14
0 -1 -2 -3 -4 . . . -13 -14 -15
-1 -2 -3 -4 -5 . . . -14 -15 -16
Enabled Output
Enables the serial output for this channel to pin SD1A.
Enables the serial output for this channel to pin SD1B.
Enables the serial output for this channel to pin SD1C.
Enables the serial output for this channel to pin SD1D.
Enabled Output.
Enables the serial output for this channel to pin SD2A.
Enables the serial output for this channel to pin SD2B.
Enables the serial output for this channel to pin SD2C.
Enables the serial output for this channel to pin SD2D.
TABLE 23. SERIAL DATA OUTPUT CONTROL REGISTER (IWA = *014h) (Continued)
38
dBFS
+3 to -83
+3 to -89
+1.7 to -95
-4.3 to -101
HSP50216
FUNCTION
August 17, 2007
FN4557.6