DAC38RF86 Datasheet, PDF (67/141 Pages) Texas Instruments – Dual- or Single-Channel, Single-Ended, 14-bit, 9-GSPS, RF-Sampling DAC with JESD204B Interface and On-Chip GSM PLL

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DAC38RF86, DAC38RF87
DAC38RF97, DAC38RF96
SLASEF4 – FEBRUARY 2017
8.5.2 IO Configuration Register (address = 0x01) [reset = 0x1800]
Figure 53. IO Configuration Register (IO_CONFIG)
15
14
13
12
11
10
9
8
0
0
0
1
1
0
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
0
0
0
1
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
Table 43. IO_CONFIG Field Descriptions
Bit
15:14
Field
GPO0_SEL
13:12 SYNC0B_SEL
11:10 SYNC1B_SEL
9:8 GPO1_SEL
7
SPI4_ENA
6
Reserved
5:0 ATEST
Type
RW
RW
RW
RW
RW
RW
RW
Reset
00
01
10
00
0
0
000000
Description
Selects the JESD SYNC_N signal coming out the GPO0 pin.
Both bits can be asserted which does an oring of the SYNC_N
signals from each multi-DUC.
bit 0 = 1 then multi-DUC1 SYNC_N used
bit 1 = 1 then multi-DUC2 SYNC_N is used
Selects the JESD SYNC_N signal coming out the SYNC0B pin.
Both bits can be asserted which does an oring of the SYNC_N
signals from each multi-DUC.
bit 0 = 1 then multi-DUC1 SYNC_N used
bit 1 = 1 then multi-DUC2 SYNC_N is used
Selects the JESD SYNC_N signal coming out the SYNC1B pin.
Both bits can be asserted which does an oring of the SYNC_N
signals from each multi-DUC.
bit 0 = 1 then multi-DUC1 SYNC_N used
bit 1 = 1 then multi-DUC2 SYNC_N is used
Selects the JESD SYNC_N signal coming out the GPO1 pin.
Both bits can be asserted which does an oring of the SYNC_N
signals from each multi-DUC.
bit 0 = 1 then multi-DUC1 SYNC_N used
bit 1 = 1 then multi-DUC2 SYNC_N is used
When set to a '1' the chip is in 4 pin SPI interface mode.
Reserved
Select the analog test points:
000000: ATEST is off (ATEST Must be off during normal
operation)
000001, 010001, 000110: VSSCLK
000010: VDDPLL1
000101: VDDCLK
000111, 001010, 010000: VDDAPLL18
001011: VDDAVCO18
001101: VDDS18
001110: VDDE1
001111, 111010, 111011, 111100: DGND
010011: VDDTX1
101001, 110001: AGND
101111, 111101, 111110, 11111: VDDDIG1
110000: VDDA18
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