CS5460 datasheet(21/34 Pages) CIRRUS

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CS5460

DS279PP5

4. REGISTER DESCRIPTION

Notes:

* “RA[4:0]” => register address bits in the Register Read/Write Command word

** “default” => bit status after reset

4.1 Configuration Register

Address: RA[4:0]* = 0x00

Default** = 0x000001

K[3:0]

Clock divider. A 4 bit binary number ranging from 0 to 15 used to divide the value of MCLK to

generate the internal clock DCLK. The internal clock frequency of DCLK = MCLK/K. Valid val-

ues are 1,2, and 4.

0001 = divide by 1 (default)

0010 = divide by 2

0100 = divide by 4

iCPU

Inverts the CPUCLK clock. In order to reduce the level of noise present when analog signals

are sampled, the logic driven by CPUCLK should not be active during the sample edge.

0 = normal operation (default)

1 = minimize noise when CPUCLK is driving rising edge logic

IHPF

Control the use of the High Pass Filter on the Current Channel.

0 = High-pass filter is disabled. If VHPF is set, use all-pass filter. Otherwise, no filter is used.

(default)

1 = High-pass filter is enabled.

VHPF

Control the use of the High Pass Filter on the voltage Channel.

0 = High-pass filter is disabled. If IHPF is set, use all-pass filter. Otherwise, no filter is used.

(default)

1 = High-pass filter enabled

Start a chip reset cycle when set 1. The reset cycle lasts for less than 10 XIN cycles. The bit

is automatically returned to 0 by the reset cycle.

DL0

When EOD = 1, EDIR becomes a user defined pin. DL0 sets the value of the EDIR pin.

Default = '0'

DL1

When EOD = 1, EOUT becomes a user defined pin. DL1 sets the value of the EOUT pin.

Default = '0'

EOD

Allows the EOUT and EDIR pins to be controlled by the DL0 and DL1 bits. EOUT and EDIR can

also be accessed using the status register.

0 = Normal operation of the EOUT and EDIR pins. (default)

1 = DL0 and DL1 bits control the EOUT and EDIR pins.

SI[1:0]

Soft interrupt configuration. Select the desired pin behavior for indication of an interrupt.

00 = active low level (default)

PC3

PC2

PC1

PC0

EWA

PH1

PH0

SI1

SI0

EOD

DL1

DL0

765

4321

VHPF

IHPF

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