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參數資料
| 型號： | AD7854SQ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs |
| 中文描述： | 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, CDIP28 |
| 封裝： | 0.600 INCH, CERDIP-28 |
| 文件頁數： | 25/28頁 |
| 文件大小： | 264K |
| 代理商： | AD7854SQ |
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AD7854/AD7854L
REV. B
–
25
–
AD7854/AD7854L to DSP5600x
Figure 41 shows a parallel interface between the AD7854/
AD7854L and the DSP5600x series of DSPs. The AD7854/
AD7854L should be mapped into the top 64 locations of Y data
memory. If extra wait states are needed in this interface, they
can be programmed using the Port A bus control register (please
see
DSP5600x User’s Manual
for details). Data can be read
from the DSP5600x using the following instruction:
MOVE Y:ADCaddr, X
0
Data can be written to the AD7854/AD7854L using the follow-
ing two instructions:
MOVE X0, Y:ADCaddr
MOVE X1, Y:ADCaddr+
1
Where
ADCaddr
is the address in the DSP5600x address space
to which the AD7854/AD7854L has been mapped.
DSP56000/
DSP56002*
A15
–
A1
X/
Y
A0
WR
IRQ
D23
–
D0
CS
HBEN
WR
RD
BUSY
DB11
–
DB0
AD7854/
AD7854L*
ADDR
DECODE
ADDRESS BUS
DATA BUS
*ADDITIONAL PINS OMITTED FOR CLARITY
RD
DS
Figure 41. AD7854/AD7854L to DSP5600x Parallel Interface
AD7854/AD7854L to TMS320C30
Figure 40 shows a parallel interface between the AD7854/
AD7854L and the TMS320C3x family of DSPs. The
AD7854/AD7854L is interfaced to the Expansion Bus of the
TMS320C3x. Two wait states are required in this interface.
These can be programmed using the WTCNT bits of the
Expansion Bus Control register (see
TMS320C3x Users Guide
for details). Data from the AD7854/AD7854L can be read
using the following instruction:
LDI *ARn,Rx
Data can be loaded into the AD7854/AD7854L using the
instructions:
STI Ry,*ARn++
STI Rz,*ARn--
where
ARn
is an auxiliary register containing the lower 16 bits
of the address of the AD7854/AD7854L in the TMS320C3x
memory space,
Rx
is the register into which the ADC data is
loaded during a load operation,
Ry
contains the 8 LSBs of
data and
Rz
contains the 8 MSBs of data to be written to the
AD7854/AD7854L.
TMS320C30*
XA12
–
XA1
XA0
IOSTRB
XR/
W
INT
x
XD23
–
XD0
CS
HBEN
WR
RD
BUSY
DB11
–
DB0
AD7854/
AD7854L*
ADDR
DECODE
EXPANSION ADDRESS BUS
EXPANSION DATA BUS
*ADDITIONAL PINS OMITTED FOR CLARITY
Figure 40. AD7854/AD7854L to TMS320C30 Parallel
Interface
相關PDF資料 |
PDF描述 |
|---|---|
| AD7854L* | 3.3V/5V Low Power RS232 3-Driver/5-Receiver Transceiver; Package: SSOP; No of Pins: 28; Temperature Range: 0°C to +70°C |
| AD7854BR | 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs |
| AD7854AR | 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs |
| AD7854L | 12-Bit Sampling ADC(單電源,200kSPS 12位采樣A/D轉換器) |
| AD7854 | 12-Bit Sampling ADC(單電源,200kSPS 12位采樣A/D轉換器) |
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