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ISL5216
13-BIT MODE: 13-BIT MANTISSA (15:3), 3-BIT EXPONENT (2:0), 18dB EXPONENT RANGE (Note 7)
EXPONENT
GAIN (dB)
PIN BIT WEIGHTING TO 16-BIT INPUT MAPPING
X(2:0) = 000
X(2:0) = 001
X(2:0) = 010
X(2:0) = 011
0
6
12
18
X15
X15
X15
X15
X15
X15
X15
X14
X15
X15
X14
X13
X15
X14
X13
X12
X14
X13
X12
X11
X13
X12
X11
X10
X12
X11
X10
X9
X11
X10
X9
X8
X10
X9
X8
X7
X9
X8
X7
X6
X8
X7
X6
X5
X7
X6
X5
X4
X6
X5
X4
X3
X5
X4
X3
0
X4
X3
0
0
X3
0
0
0
(Note 6)
NOTES:
6. Or 100, 101, 110, or 111, the exponent input saturates at 011.
7. To select this mode, set IWA *000H/GWA F804H bits 17, 16, 8 and 7 to 0, 0, 1 and 0 respectively.
14-BIT MODE: 14-BIT MANTISSA (15:2), 2-BIT EXPONENT (1:0), 18dB MAXIMUM EXPONENT RANGE (Note 8)
EXPONENT
GAIN (dB)
PIN BIT WEIGHTING TO 16-BIT INPUT MAPPING
X(1:0) = 00
X(1:0) = 01
X(1:0) = 10
X(1:0) = 11
0
6
12
18
X15
X15
X15
X15
X14
X14
X14
X14
X13
X13
X13
X13
X12
X12
X12
X12
X11
X11
X11
X11
X10
X10
X10
X10
X9
X9
X9
X9
X8
X8
X8
X8
X7
X7
X7
X7
X6
X6
X6
X6
X5
X5
X5
X5
X4
X4
X4
X4
X3
X3
X3
X3
X2
X2
X2
X2
0
0
0
0
0
0
0
0
NOTE:
8. To select this mode, set IWA *000H/GWA F804H bits 17, 16, 8 and 7 to 0, 0, 1 and 1 respectively.
14-BIT MODE: 14-BIT MANTISSA (15:2), 3-BIT EXPONENT (-1,1,0), 42dB MAXIMUM EXPONENT RANGE (Note 9)
EXPONENT
GAIN (dB)
PIN BIT WEIGHTING TO 16-BIT INPUT MAPPING
X(-1,1,0) = 000
X(-1,1,0) = 001
X(-1,1,0) = 010
X(-1,1,0) = 011
X(-1,1,0) = 100
X(-1,1,0) = 101
X(-1,1,0) = 110
X(-1,1,0) = 111
0
6
12
18
24
30
36
42
X15
X15
X15
X15
X15
X15
X15
X15
X14
X14
X14
X14
X14
X14
X14
X14
X13
X13
X13
X13
X13
X13
X13
X13
X12
X12
X12
X12
X12
X12
X12
X12
X11
X11
X11
X11
X11
X11
X11
X11
X10
X10
X10
X10
X10
X10
X10
X10
X9
X9
X9
X9
X9
X9
X9
X9
X8
X8
X8
X8
X8
X8
X8
X8
X7
X7
X7
X7
X7
X7
X7
X7
X6
X6
X6
X6
X6
X6
X6
X6
X5
X5
X5
X5
X5
X5
X5
X5
X4
X4
X4
X4
X4
X4
X4
X4
X3
X3
X3
X3
X3
X3
X3
X3
X2
X2
X2
X2
X2
X2
X2
X2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
NOTE:
9. To select this mode, set IWA *000H/GWA F804H bits 17, 16, 8 and 7 to 1, 0, 1 and 1 respectively.
11, 12, 13-BIT MODE: 11, 12, 13-BIT MANTISSA, 3-BIT EXPONENT (-1,1,0) (Note 10), 42dB MAXIMUM EXPONENT RANGE (Note 11)
EXPONENT
GAIN (dB)
PIN BIT WEIGHTING TO 16-BIT INPUT MAPPING
X(-1,1,0) = 000
X(-1,1,0) = 001
X(-1,1,0) = 010
X(-1,1,0) = 011
X(-1,1,0) = 100
X(-1,1,0) = 101
X(-1,1,0) = 110
X(-1,1,0) = 111
0
6
12
18
24
30
36
42
X15
X15
X15
X15
X15
X15
X15
X15
X14
X14
X14
X14
X14
X14
X14
X14
X13
X13
X13
X13
X13
X13
X13
X13
X12
X12
X12
X12
X12
X12
X12
X12
X11
X11
X11
X11
X11
X11
X11
X11
X10
X10
X10
X10
X10
X10
X10
X10
X9
X9
X9
X9
X9
X9
X9
X9
X8
X8
X8
X8
X8
X8
X8
X8
X7
X7
X7
X7
X7
X7
X7
X7
X6
X6
X6
X6
X6
X6
X6
X6
X5
X5
X5
X5
X5
X5
X5
X5
X4
X4
X4
X4
X4
X4
X4
X4
X3
X3
X3
X3
X3
X3
X3
X3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
NOTES:
10. For compatibility with legacy HSP50216 11, 12 and 13 bit floating point modes as well as the new ISL5216 modes, the most significant exponent
bit is taken as X2 OR’d with X-1. Either input may be used for the MSB of the exponent when the other is tied low.
11. To select these modes, set IWA *000H/GWA F804H bits 17 and 16 to 1 and 0, respectively, and bits 8 and 7 to 0 and 0 for 11/3, 0 and 1 for 12/3,
and 1 and 0 for 13/3.
9
FN6013.3
July 13, 2007
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