hsp50215 Intersil Corporation, hsp50215 Datasheet - Page 17

• Manufacturer Part Number: hsp50215
• Description: Digital Upconverter
• Manufacturer: Intersil Corporation

POSITION
POSITION
POSITION
POSITION
15-8
15-3
15-6
BIT
BIT
BIT
BIT
1-0
7-0
2-0
5-2
1-0
2
Delay Select
Mod Type
Reserved
Output Gain
Reserved (Note 1)
FIFORDY Threshold
Reserved (Note 1)
DS
IP
FUNCTION
FUNCTION
FUNCTION
FUNCTION
3-438
CONTROL ADDRESS 16: MODULATION CONTROL (Continued)
DLYSEL.
1 = no delay.
0 = 1/2 coarse sample delay.
MOD(1:0):
Reserved.
OUTGAIN(7:0)
Reserved (Note 1).
RTH(2:0). Programmable FIFO READY Threshold. This digital word represents the FIFO depth
threshold (number of data samples in the FIFO) at which the FIFORDY will be asserted, alerting the
data source that more input data is required in the FIFO. The FIFO threshold sets both the I and Q
FIFO thresholds. RTH2 is the MSB.
Reserved (Note 1).
DS(3:0). Number of data samples in shaping filter, 4-16. Load with number of data samples minus 1.
IP(1:0). Number of interpolation phases:
00 = not valid.
01 = 4.
10 = 8.
11 = 16.
00 = QASK.
01 = FM with filtering after modulation (analog FM with baseband filtering provided before
10 = FM with filtering before modulation (FSK, GMSK). This mode uses only the I filter bank.
11 = not used.
CONTROL WORDS 19: POLYPHASE CONTROL
HSP50215). In this mode, both I and Q filters are used.
CONTROL ADDRESS 17: GAIN CONTROL
CONTROL WORDS 18: FIFO CONTROL
HSP50215
OUTGAIN (7:0)
1111 1111
1000 0000
0100 0000
0010 0000
0001 0000
0000 1000
0000 0100
0000 0010
0000 0001
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
ATTENUATION
-12.041
-18.062
-24.082
-30.103
-36.124
-42.144
-48.165
-0.033996
-6.021
(dBFS)
SCALING GAIN
((V
99.6
50.0
25.0
12.5
OUT
6.25
3.125
1.5625
0.78125
0.390625
/V
IN
)%)