Texas Instruments AFE79 Series - 1.2.1.10.1 Error Reporting; 1.2.1.11 Channel Frequency (NCO) Resolution

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88
SBAU337–May 2020
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Macro
Table 1-20. (continued)
Macro TX DAC Rate configuration
1 0x00 1 Validity TX DAC Rate
Validity
Bit 0: 1 → Value
specified in operand
2 is valid for TX12
Bit 1: 1 → Value
specified in operand
2 is valid for TX34
Bits 7:2 →
RESERVED
2 0x00 1 Index TX DAC Rate Index.
Mapping from index
to actual rate is
given below.
(x = 61.44 MHz)
<8 → RESERVED
8 → 60x = 3686.4
MHz
9 → 64x = 3932.16
MHz
10 → 72x = 4423.68
MHz
11 → 80x = 4915.2
MHz
12 → 96x = 5898.24
MHz
13 → 120x = 7372.8
MHz
14 → 128x =
7864.32 MHz
15 → 144x =
8847.36 MHz
16 → 160x = 9830.4
MHz
17 → 192x =
11796.48 MHz
>17 → RESERVED
Memory Not used
1.2.1.10.1 Error Reporting
Table 1-21 lists the error conditions associated with this macro.
Table 1-21.
Error Status Registers Interpretation
Error Code 1 (16-bit)
Bit[0]: ‘1’ → Invalid TX DAC Rate Validity argument
Bit[1]: ‘1’ → Invalid DAC Rate Index argument
Error Code 2 (32-bit) Not Used
1.2.1.11 Channel Frequency (NCO) Resolution
This macro specifies the resolution of the frequency value specified in the RX, FB, and TX Channel
Frequency Set Macros. AFE79XX supports 2 channel frequency resolution modes – (a) 1-kHz resolution
mode, (b) 32-bit resolution mode. This macro should be called prior to any of the “Channel Frequency Set”
macros.
In the 32-bit resolution mode the resolution is CONVERTER-RATE/2
32
. Example for RX Channels it will be
RX-ADC-RATE/2
32
; for FB channels it will be FB-ADC-RATE/2
32
; for TX channels it will be TX-DAC-
RATE/2
32
.