LMX3162 National Semiconductor, LMX3162 Datasheet - Page 14

• Manufacturer Part Number: LMX3162
• Description: Single Chip Radio Transceiver
• Manufacturer: National Semiconductor

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Receiver Functional Description
Note 18: The receiver can be powered down, either by hardware through the Rx PD pin, or by software through the programming of F6 bit in the F-Latch. The power
down control method is determined by the settings of F11 and F12 in F-Latch. (Refer to Function Register Programming Description section for details.)
Note 19: The internal capacitor of the discriminator has a value of 1 pF, and has been optimized for operation at 110 MHz.
Transmitter Functional Description
The simplified block diagram below shows the doubler and voltage regulator for an external transmit gain stage.
Note: The transmitter can be powered down, either by hardware through the Tx PD pin, or by software through the programming of F7 bith in F-Latch. The
power down control method is determined by the settings of F11 and F12 in F-Latch. (Refer to Function Register Programming Description section for details.)
Function Register Programming Description (F-Latch)
If the control bits are “1X”, data is transferred from the 20-bit shift register into the 18-bit F-latch. Serial data format is shown
below.
Note: X = Don’t Care Condition
Various modes of operation can be programmed with the function register bits F1–F18, including the phase detector polarity,
charge pump TRI-STATE and CMOS outputs. In addition, software or hardwire power down modes can be specified with bits F11
and F12.
MSB
F18
19
F17
18
F16
17
F15
16
F14
15
F13
14
MODE CONTROL WORD
F12
13
REGISTER’S BIT MAPPING
F11 F10
12
(Continued)
11
14
10
F9
F8
9
F7
8
F6
7
F5
6
DS100929-6
F4
5
F3
4
F2
3
DS100929-5
F1
2
C2
1
X
LSB
C1
0
1