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参数资料
型号： AD9734-DPG2-EBZ
厂商： Analog Devices Inc
文件页数： 26/72页
文件大小： 0K
描述： BOARD EVAL FOR AD9734
标准包装： 1
DAC 的数量： 1
位数： 10
采样率（每秒）： 1.2G
数据接口： 串行，SPI?
DAC 型： 电流
工作温度： -40°C ~ 85°C
已供物品： 板，软件
已用 IC / 零件： AD9734
AD9734/AD9735/AD9736
Rev. A | Page 32 of 72
SYNC CONTROLLER (SYNC_CNT) REGISTERS (REG. 7, REG. 8)
ADDR
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0x07
SYNC_CNT1
FIFOSTAT3
FIFOSTAT2
FIFOSTAT1
FIFOSTAT0
VALID
SCHANGE
PHOF<1>
PHOF<0>
0x08
SYNC_CNT2
SSURV
SAUTO
SFLT<3>
SFLT<2>
SFLT<1>
SFLT<0>
RESERVED
STRH<0>
Table 14. Sync Controller Register Bit Descriptions
Bit Name
Read/Write
Description
FIFOSTAT<2:0>
READ
Position of FIFO read counter ranges from 0 to 7.
FIFOSTAT<3>
READ
0, SYNC logic OK.
1, error in SYNC logic.
VALID
READ
0, FIFOSTAT<3:0> is not valid yet.
1, FIFOSTAT<3:0> is valid after a reset.
SCHANGE
READ
0, no change in FIFOSTAT<3:0>.
1, FIFOSTAT<3:0> has changed since the previous measurement cycle when SSURV = 1 (surveillance mode
active).
PHOF<1:0>
WRITE
00, change the readout counter.
READ
Current setting of the readout counter (PHOF<1:0>) in surveillance mode (SSURV = 1) after an interrupt.
Current calculated optimal readout counter value in AUTO mode (SAUTO = 1).
SSURV
WRITE
0, the controller stops after completion of the current measurement cycle.
1, continuous measurements are taken and an interrupt is issued if the readout counter drifts beyond the
threshold value.
SAUTO
WRITE
0, readout counter (PHOF<3:0>) is not automatically updated.
1, continuously starts measurement cycles and updates the readout counter according to the
measurement.
NOTE: SSURV (Reg. 8, Bit 7) must be set to 1 and the SYNC IRQ (Reg. 1, Bit 2) must be set to 0 for AUTO
mode.
SFLT<3:0>
WRITE
0x0, average filter length, FIFOSTAT = FIFOSTAT + Delta FIFOSTAT/2 ^ SFLT<3:0>; values greater than 12
(0x0C) are clipped to 12.
STRH<0>
WRITE
0, if FIFOSTAT<2:0> = 0 or 7, a sync interrupt is generated.
1, if FIFOSTAT<2:0> = 0, 1, 6 or 7, a sync interrupt is generated.
CROSS CONTROLLER (CROS_CNT) REGISTERS (REG. 10, REG. 11)
ADDR
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0x0A
CROS_CNT1
–
UPDEL<5>
UPDEL<4>
UPDEL<3>
UPDEL<2>
UPDEL<1>
UPDEL<0>
0x0B
CROS_CNT2
–
DNDEL<5>
DNDEL<4>
DNDEL<3>
DNDEL<2>
DNDEL<1>
DNDEL<0>
Table 15. Cross Controller Register Description
Bit Name
Read/Write
Description
UPDEL<5:0>
WRITE
0x00, move the differential output stage switching point up, set to 0 if DNDEL is non-zero.
DNDEL<5:0>
WRITE
0x00, move the differential output stage switching point down, set to 0 if UPDEL is non-zero.
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