L64777 LSI Logic Corporation, L64777 Datasheet - Page 67

• Manufacturer Part Number: L64777
• Description: DVB Qam Modulator
• Manufacturer: LSI Logic Corporation

4.1.3 Register 2
4.1.4 Register 3
SMAG
RES
7
7
RES
6
6
MSIZE
RES
FDEL
SMAG
RES
Group 2 General-Purpose Registers
IQ_EX
5
Symbol Size
This value indicates the size of symbols:
0b000 = 1 bit
0b001 = 2 bit
0b010 = 3 bit
0b011 = 4 bit
0b100 = 5 bit
0b101 = 6 bit
0b110 = 7 bit
0b111 = 8 bit.
The reset value is 0b101
Reserved
This bit is reserved.
FIFO Delay
This parameter indicates the FIFO delay value in the
Gray Code. Writing to this location loads the ICLK
address counter with 0 and the OCLK-driven address
counter to the FDEL value. If the FIFO is automatically
reset, the L64777 also uses this value for the
OCLK-driven address. The reset value is 0b110 0000.
Sign Magnitude
When this bit is 0, the L64777 outputs a two’s
complement at the Nyquist filter. When this bit is 1, the
L64777 inverts the sign bit and the output sign magnitude
representation. The reset value is 0.
Reserved
These bits are reserved.
RES
4
SCR_OFF
FDEL
3
RS_OFF
2
INT_OFF
1
R/W [2:0]
R/W [6:0]
RES
6, 4, 0
R/W 7
0
0
4-5
7