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| 型号： | AD9959/PCBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 17/44页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD9959 |
| 产品培训模块： | Direct Digital Synthesis Tutorial Series (1 of 7): Introduction Direct Digital Synthesizer Tutorial Series (7 of 7): DDS in Action Direct Digital Synthesis Tutorial Series (3 of 7): Angle to Amplitude Converter Direct Digital Synthesis Tutorial Series (6 of 7): SINC Envelope Correction Direct Digital Synthesis Tutorial Series (4 of 7): Digital-to-Analog Converter Direct Digital Synthesis Tutorial Series (2 of 7): The Accumulator |
| 设计资源： | Phase Coherent FSK Modulator (CN0186) AD9958/59 Eval Brd Schematics AD9958/59 Eval Brd Gerber Files AD9959 Eval Brd BOM |
| 标准包装： | 1 |
| 主要目的： | 计时，直接数字合成（DDS） |
| 嵌入式： | 否 |
| 已用 IC / 零件： | AD9959 |
| 主要属性： | 10 位数模转换器，32 位调节字宽 |
| 次要属性： | 4 通道 |
| 已供物品： | 板，线缆，软件 |
| 其它名称： | AD9959/PCB AD9959/PCB-ND Q2548077 |
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AD9959
Rev. B | Page 24 of 44
MODULATION USING SDIO_x PINS FOR RU/RD
For RU/RD bits = 11, the SDIO_1, SDIO_2, and SDIO_3 pins
are available for RU/RD. In this mode, modulation levels of 2, 4,
and 16 are available. Note that the serial I/O port can be used only
in 1-bit serial mode.
Two-Level Modulation Using SDIO Pins for RU/RD
Table 15. Profile Pin and Channel Assignments in Two-Level
Modulation (RU/RD Enabled)
Profile Pin Config. (PPC)
(FR1[14:12])
P0
P1
P2
P3
XXX
CH0
CH1
CH2
CH3
For the configuration in Table 15, each profile pin is dedicated
to a specific channel. In this case, the SDIO_x pins can be used
for the RU/RD function, as described in Table 16.
Four-Level Modulation Using SDIO Pins for RU/RD
For RU/RD bits = 11 (the SDIO_1 and SDIO_2 pins are avail-
able for RU/RD), the modulation level is set to 4. See Table 17
for pin assignments, including SDIO_x pin assignments.
For the configuration shown in Table 17, the profile (channel
word) register is chosen based on the 2-bit value presented to
Profile Pins [P1:P2] or [P3:P4].
For example, if PPC = 011, [P0:P1] = 11, and [P2:P3] = 01,
the contents of the Channel Word 3 register of Channel 1 are
presented to the output of Channel 1, and the contents of the
Channel Word 1 register of Channel 2 are presented to the
output of Channel 2. SDIO_1 and SDIO_2 provide the RU/RD
function.
16-Level Modulation Using SDIO Pins for RU/RD
The RU/RD bits = 11 (the SDIO_1 pin is available for RU/RD),
and the level is set to 16. See the pin assignments shown in
For the configuration shown in Table 18, the profile (channel
word) register is chosen based on the 4-bit value presented to
Profile Pins [P0:P3]. For example, if PPC = X10 and [P0:P3] =
1101, then the contents of the Channel Word 13 register of
Channel 2 is presented to the output of Channel 2. The SDIO_1
pin provides the RU/RD function.
Table 16. Channel and SDIO_1/SDIO_2/SDIO_3 Pin Assignments for RU/RD Operation
SDIO_1
SDIO_2
SDIO_3
Description
0
Triggers the ramp-up function for CH0
0
1
Triggers the ramp-down function for CH0
0
1
0
Triggers the ramp-up function for CH1
0
1
Triggers the ramp-down function for CH1
1
0
Triggers the ramp-up function for CH2
1
0
1
Triggers the ramp-down function for CH2
1
0
Triggers the ramp-up function for CH3
1
Triggers the ramp-down function for CH3
Table 17. Channel and Profile Pin Assignments, Including SDIO_1/SDIO_2/SDIO_3 Pin Assignments for RU/RD Operation
Profile Pin Configuration (PPC) (FR1[14:12])
P0
P1
P2
P3
SDIO_1
SDIO_2
SDIO_3
000
CH0
CH1
CH0 RU/RD
CH1 RU/RD
N/A
001
CH0
CH2
CH0 RU/RD
CH2 RU/RD
N/A
010
CH0
CH3
CH0 RU/RD
CH3 RU/RD
N/A
011
CH1
CH2
CH1 RU/RD
CH2 RU/RD
N/A
100
CH1
CH3
CH1 RU/RD
CH3 RU/RD
N/A
101
CH2
CH3
CH2 RU/RD
CH3 RU/RD
N/A
Table 18. Channel and Profile Pin Assignments, Including SDIO_1 Pin Assignments for RU/RD Operation
Profile Pin Configuration (PPC) (FR1[14:12])
P0
P1
P2
P3
SDIO_1
SDIO_2
SDIO_3
X00
CH0
CH0 RU/RD
N/A
X01
CH1
CH1 RU/RD
N/A
X10
CH2
CH2 RU/RD
N/A
X11
CH3
CH3 RU/RD
N/A
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