AD7853_15 Datasheet, PDF (29/34 Pages) Analog Devices – 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs

Interface Mode 1 Configuration
Figure 42 shows the flowchart for configuring the part in
Interface Mode 1. This mode of operation can only enabled by
writing to the control register and setting the 2/3 MODE bit.
Reading and writing cannot take place simultaneously in this
mode as the DIN pin is used for both reading and writing.
START
AD7853/AD7853L
Interface Modes 4 and 5 Configuration
Figure 43 shows the flowchart for configuring the AD7853/
AD7853L in Interface Modes 4 and 5, the self-clocking modes.
In this case it is not recommended to use the software conver-
sion start option. The read and write operations always occur
simultaneously and during conversion.
START
POWER-ON, APPLY CLKIN SIGNAL,
WAIT 150ms FOR AUTOMATIC CALIBRATION
POWER-ON, APPLY CLKIN SIGNAL,
WAIT 150ms FOR AUTOMATIC CALIBRATION
SERIAL
INTERFACE
MODE
?
1
YES
INITIATE
CONVERSION
IN
SOFTWARE
?
NO
APPLY
(IF REQUIRED),
SCLK, WRITE TO CONTROL REGISTER
SETTING THE TWO-WIRE MODE
AND CONVST BIT TO 1
APPLY
(IF REQUIRED),
SCLK, WRITE TO CONTROL REGISTER
SETTING THE TWO-WIRE MODE
SERIAL
INTERFACE
MODE
?
4, 5
PULSE
PIN
AUTOMATICALLY GOES
LOW AFTER
RISING EDGE
SCLK AUTOMATICALLY ACTIVE, READ CURRENT
CONVERSION RESULT ON DOUT PIN, WRITE
TO CONTROL REGISTER ON DIN PIN
PULSE
PIN
Figure 43. Flowchart for Setting Up, Reading and Writing
in Interface Modes 4 and 5
WAIT APPROXIMATLY 200ns
AFTER
RISING EDGE
OR AFTER END OF CONTROL
REGISTER WRITE
APPLY
(IF REQUIRED),
SCLK, READ PREVIOUS CONVERSION
RESULT ON DIN PIN
YES
READ
DATA
DURING
CONVERSION
?
NO
WAIT FOR BUSY SIGNAL TO GO
LOW OR WAIT FOR BUSY BIT = 0
APPLY
(IF REQUIRED), SCLK, READ
CURRENT CONVERSION RESULT ON DIN PIN
Figure 42. Flowchart for Setting Up, Reading and Writing
in Interface Mode 1
REV. B
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