JAJSCY4D December 2016 – December 2023 DAC38RF80 , DAC38RF83 , DAC38RF84 , DAC38RF85 , DAC38RF90 , DAC38RF93
PRODUCTION DATA
デバイスごとのパッケージ図は、PDF版データシートをご参照ください。
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
0 | 0 | 0 | 0 | 0 | 1 | 0 | x |
R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 |
R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit | Field | Type | Reset | Description |
---|---|---|---|---|
15:14 | DAC_BITWIDTH | R/W | 0b00 | Determines the bit width of the data going to the DAC 00: 14 bits 01: 14 bits 10: 12 bits 11: 11 bits |
13 | ZERO_INVLD_DATA | R/W | 1 | When asserted; the data from the JESD block is zeroed in the mapper to prevent goofy output from the DAC. For test purposes this bit should be desasserted |
12 | SHORTTEST_ENA | R/W | 0 | Turns on the JESD SHORT pattern test (5.1.6.2) |
11 | Reserved | R/W | 0 | Reserved |
10 | Reserved | R/W | 1 | Reserved |
9 | MIXERAB_ENA | R/W | 0 | Turns on the mixer for the A and B streams |
8 | MIXERCD_ENA | R/W | 0 | Turns on the mixer for the C and D streams |
7 | MIXERAB_GAIN | R/W | 0 | Adds 6dB of gain when asserted |
6 | MIXERCD_GAIN | R/W | 0 | Adds 6dB of gain when asserted |
5 | NCOAB_ENA | R/W | 0 | When high the full NCO block is turned on. |
4 | NCOCD_ENA | R/W | 0 | When high the full NCO block is turned on. |
3:2 | Reserved | R/W | 00 | Reserved |
1 | TWOS | R/W | 1 | When asserted the chip is expecting 2's complement data is arriving through the JESD; otherwise offset binary is expected |
0 | Reserved | R/W | 0 | Reserved |