WM8731 datasheet(42/56 Pages) WOLFSON

Part #	WM8731

Description	Portable Internet Audion CODEC with Headphone Driver and Programmable Sample Rates

PDF	56 Pages

Scroll/Zoom	100%

Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

Logo

42 / 56 page

WM8731

Advanced Information

WOLFSON MICROELECTRONICS LTD

AI Rev 2.0 February 2001

3-WIRE (SPI COMPATIBLE) SERIAL CONTROL MODE

The WM8731 can be controlled using a 3-wire serial interface. SDIN is used for the program data,

SCLK is used to clock in the program data and CSB is use to latch in the program data. The 3-wire

interface protocol is shown in Figure 31.

CSB

SCLK

SDIN

B15

B10

B11

B12

B13

B14

Figure 31 3-Wire Serial Interface

Notes:

B[15:9] are Control Address Bits

B[8:0] are Control Data Bits

CSB is edge sensitive not level sensitive. The data is latched on the rising edge of CSB.

2-WIRE SERIAL CONTROL MODE

The WM8731 supports a 2-wire MPU serial interface. The device operates as a slave device only.

The WM8731 has one of two slave addresses that are selected by setting the state of pin 10, (CSB).

SDIN

SCLK

ACK

R ADDR

ACK

DATA B15-8

STOP

START

DATA B7-0

R/W

ACK

Figure 32 2-Wire Serial Interface

Notes:

B[15:9] are Control Address Bits

B[8:0] are Control Data Bits

CSB STATE

(Default = LOW)

Address

0011010

0011011

Table 24 2-Wire MPU Interface Address Selection

WM8731 Datasheet(PDF) 42 Page - Wolfson Microelectronics plc

WM8731 Datasheet(HTML) 42 Page - Wolfson Microelectronics plc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

Datasheet Download

Link URL