adf7023-j Analog Devices, Inc., adf7023-j Datasheet - Page 83

• Manufacturer Part Number: adf7023-j
• Description: High Performance, Low Power, Ism Band Fsk/gfsk/msk/gmsk Transceiver Ic
• Manufacturer: Analog Devices, Inc.

Table 69. 0x113: RADIO_CFG_7
Bit
[7:6]
[5:4]
[3:0]
Table 70. 0x114: RADIO_CFG_8
Bit
[7]
[6:3]
Name
PA_SINGLE_DIFF_SEL
PA_LEVEL
Name
AGC_LOCK_MODE
SYNTH_LUT_CONTROL
SYNTH_LUT_CONFIG_1
R/W
R/W
R/W
Description
PA_SINGLE_DIFF_SEL
0
1
Sets the PA output power. A value of zero sets the minimum RF output power, and a value of 15
sets the maximum PA output power. The PA level can also be set with finer resolution using the
PA_LEVEL_MCR setting (Address 0x307). The PA_LEVEL setting is related to the PA_LEVEL_MCR
setting by PA_LEVEL_MCR = 4 × PA_LEVEL + 3.
PA_LEVEL
0
1
2
15
R/W
R/W
R/W
R/W
Rev. 0 | Page 83 of 100
Description
0: free running
1: manual
2: hold
3: lock after preamble/sync word (only locks on a sync word if PREAMBLE_
MATCH = 0)
By default, the synthesizer loop bandwidth is automatically selected from
lookup tables (LUT) in ROM memory. A narrow bandwidth is selected in
receive to ensure optimum interference rejection, whereas in transmit, the
bandwidth is selected based on the data rate and modulation settings. For
the majority of applications, these automatically selected PLL loop
bandwidths are optimum. However, in some applications, it may be
necessary to use custom transmit or receive bandwidths, in which case,
various options exist, as follows.
SYNTH_LUT_CONTROL
0
1
2
3
Because packet RAM memory is lost in the PHY_SLEEP state, the custom
LUT for transmit must be reloaded to packet RAM after waking from the
PHY_SLEEP state.
If SYNTH_LUT_CONTROL = 0 or 2, set SYNTH_LUT_CONFIG_0 to 0. If
SYNTH_LUT_CONTROL = 1 or 3, this setting allows the receiver PLL loop
bandwidth to be changed to optimize the receiver local oscillator phase noise.
Set to:
PA
Single-ended PA enabled
Differential PA enabled
PA Level (PA_LEVEL_MCR)
Setting 3
Setting 7
Setting 11
Setting 63
Description
Use predefined transmit and receive LUTs. The
LUTs are automatically selected from ROM
memory on transitioning into the PHY_TX or
PHY_RX state.
Use custom receive LUT based on SYNTH_
LUT_CONFIG_0 and SYNTH_LUT_CONFIG_1. In
transmit, the predefined LUT in ROM is used.
Use a custom transmit LUT. The custom
transmit LUT must be written to the 0x10 to
0x18 packet RAM locations. In receive, the
predefined LUT in ROM is used.
Use a custom receive LUT based on SYNTH_
LUT_CONFIG_0 and SYNTH_LUT_CONFIG_1,
and use a custom transmit LUT. The custom
transmit LUT must be written to the 0x10 to
0x18 packet RAM locations.
ADF7023-J