WM8214SCDSSLASHR datasheet(23/36 Pages) WOLFSON

Teilenummer	WM8214SCDS/R

Bauteilbeschribung	40MSPS 16-bit CCD Digitiser

PDF	36 Pages

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Hersteller	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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Production Data

WM8214

PD Rev 4.1 March 2007

SERIAL INTERFACE: REGISTER READ-BACK

Figure 19 shows register read-back in serial mode. Read-back is initiated by writing to the serial bus

as described above but with address bit a4 set to 1, followed by an 8-bit dummy data word. Writing

address (a5, 1, a3, a2, a1, a0) will cause the contents (d7, d6, d5, d4, d3, d2, d1, d0) of

corresponding register (a5, 0, a3, a2, a1, a0) to be output MSB first on pin SDO (on the falling edge

of SCK). Note that pin SDO is shared with an output pin, OP[7], therefore OEB should always be

held low and the OPD register bit should be set low when register read-back data is expected on this

pin. The next word may be read in to SDI while the previous word is still being output on SDO.

SCK

SEN

SDI

a3 a2 a1 a0

xxx

Address

Data Word

d7 d6 d5 d4 d3 d2 d1 d0

Output Data Word

SDO/

OP[7]

OEB

Figure 19 Serial Interface Register Read-back

WM8214SCDS/R Datenblatt(PDF) 23 Page - Wolfson Microelectronics plc