參數(shù)資料
型號(hào)： EVAL-AD7262EDZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 24/33頁(yè)
文件大小： 0K
描述： BOARD EVAL CONTROL AD7262
標(biāo)準(zhǔn)包裝： 1
ADC 的數(shù)量： 2
位數(shù)： 12
采樣率（每秒）： 1M
數(shù)據(jù)接口： 串行
輸入范圍： 5 Vpp
在以下條件下的電源（標(biāo)準(zhǔn)）： 120mW @ 1MSPS
工作溫度： -40°C ~ 105°C
已用 IC / 零件： AD7262
已供物品： 板，CD
AD7262
Rev. 0 | Page 29 of 32
MICROPROCESSOR INTERFACING
The serial interface on the AD7262/AD7262-5 allows the parts
to be directly connected to a range of different microprocessors.
This section explains how to interface the AD7262/AD7262-5
with the Analog Devices, Inc., Blackfin DSP, the ADSP-BF537.
AD7262/AD7262-5 TO ADSP-BF53x
The ADSP-BF53x family of DSPs interface directly to the
AD7262/AD7262-5 without any glue logic required. The
VDRIVE pin of the AD7262/AD7262-5 takes the same supply
voltage as that of the ADSP-BF53x. This allows the ADC to
operate at a higher supply voltage than its serial interface and,
therefore, the ADSP-BF53x, if necessary. The availability of
secondary receive registers on the serial ports of the Blackfin
DSPs means only one serial port is necessary to read from both
DOUT pins simultaneously. Figure 37 shows both DOUTA and
DOUTB of the AD7262/AD7262-5 connected to Serial Port 0 of
the ADSP-BF53x. The SPORT0 Receive Configuration 1
register and SPORT0 Receive Configuration 2 register should
be set up as outlined in Table 14 and Table 15.
07
60
6-
03
7
SERIAL
DEVICE A
(PRIMARY)
SERIAL
DEVICE B
(SECONDARY)
AD72621
DOUTA
CS
SCLK
ADSP-BF53x1
1ADDITIONAL PINS OMITTED FOR CLARITY.
DR0PRI
DR0SEC
RFS0
VDRIVE
VDD
DOUTB
RCLK0
SPORT0
Figure 37. Interfacing the AD7262 to the ADSP-BF53x
Table 14. The SPORT0 Receive Configuration 1 Register
(SPORT0_RCR1)
Setting
Description
RCKFE = 1
Sample data with falling edge of RSCLK
LRFS = 1
Active low frame signal
RFSR = 1
Frame every word
IRFS = 1
Internal receive frame sync (RFS) used
RLSBIT = 0
Receive MSB first
RDTYPE = 00
Zero fill
IRCLK = 1
Internal receive clock
RSPEN = 1
Receive enabled
SLEN = 11110
31-bit data-word
TFSR = RFSR = 1
Table 15. The SPORT0 Receive Configuration 2 Register
(SPORT0_RCR2)
Setting
Description
RXSE = 1
Secondary side enabled
A Blackfin driver for the AD7262/AD7262-5 is available to
download at www.analog.com.
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