CS8427-IS View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS8427-IS

96 kHz Digital Audio Interface Transceiver

Cirrus Logic 

CS8427

mode is used for active low, wired-OR hook-ups

with multiple peripherals connected to the micro-

controller interrupt input pin.

Many conditions can cause an interrupt, as listed in

the interrupt status register descriptions. Each

source may be masked off using mask register

bits. In addition, each source may be set to rising

edge, falling edge, or level sensitive. Combined

with the option of level sensitive or edge sensitive

modes within the microcontroller, many different

set-ups are possible depending on the needs of

the equipment designer.

CS

CCLK

C D IN

C H IP

ADDRESS

0010000

MAP

DATA

R/W

MSB

LSB

b yte 1 b yte n

C H IP

ADDRESS

0010000 R/W

CDOUT

High Impedance

MSB

LSB MSB

LSB

MAP = Memory Address Pointer, 8 bits, MSB first

Figure 17. Control Port Timing in SPI Mode

SDA

Note 1

Note 2

Note 3

0010 AD2-0 R/W ACK DATA7-0 ACK DATA7-0 ACK

SCL

Start

Stop

Note 1: AD2 is derived from a resistor attached to the EMPH pin,

AD1 and AD0 are determined by the state of the corresponding pins

Note 2: If operation is a write, this byte contains the Memory Address Pointer, MAP

Note 3: If operation is a read, the last bit of the read should be a NACK(high)

Figure 18. Control Port Timing in I²C Mode

26

DS477F1

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