cx74063-26 Skyworks Solutions, Inc., cx74063-26 Datasheet - Page 32

• Manufacturer Part Number: cx74063-26
• Description: Transceiver Multi-band Gprs, Edge Applications With Power Ramping Controller Integrated Crystal Oscillator With Output
• Manufacturer: Skyworks Solutions, Inc.

Data Sheet I CX74063-26
32
MAY 16, 2003
ADDR
FN
ADDR
LNA
MIX
LPF1
VGA2
AUX
VGA1
VGA1FINE
Symbol
Symbol
Address bits [1:0]. Must be set to
10b (see Table 12)
Fractional-N modulo [23:2]
Address bits [1:0]. Must be set to
11b (see Table 12)
LNA gain step control [2]
Mixer gain step [3]
1st LPF gain step [4]
VGA2 gain steps [7:5]
Auxiliary gain [8]
VGA1 gain steps [11:9]
VGA1 fine gain step [13:12]
[781] 376-3000 I FAX [781] 376-3100 I [e-mail] I WWW.SKYWORKSINC.COM
Skyworks Solutions, Inc., Proprietary and Confidential
Function
Function
Table 14. SX2 Fractional-N Modulo Register
Table 15. RX/TX Control Register (1 of 2)
0 selects low gain mode of LNA
0 selects low gain mode of RX mixer
Sets fractional-N modulo up to 2
1 selects high gain mode of LNA
1 selects high gain mode of RX mixer
0 selects low gain mode of the first active LPF
1 selects high gain mode of the first active LPF
Bit 7 to bit 5 program the VGA2 gain in 6 dB increments:
0 sets 0 dB auxiliary gain post gmC filter
1 sets 6 dB auxiliary gain post gmC filter
Bit 11 to bit 9 program the VGA1 gain in the following
increments:
Bit 13 and bit 12 program VGA1 in 2 dB increments:
Bit 11, Bit 10, Bit 9
Bit 13, Bit 12
Bit 7, Bit 6, Bit 5
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
sets gain to 0 dB
sets gain to 4 dB
sets gain to 2 dB
not used
State Description
State Description
sets the gain to 30 dB
sets the gain to 24 dB
sets the gain to 18 dB
sets the gain to 12 dB
sets the gain to 6 dB
sets the gain to 0 dB
not used
not used
sets the gain to 0 dB
sets the gain to 24 dB
sets the gain to 12 dB
not used
sets the gain to 6 dB
sets the gain to 30 dB
sets the gain to 18 dB
not used
22
range (0…4,194,303)
103052A