PCM1604 BURR-BROWN [Burr-Brown Corporation], PCM1604 Datasheet - Page 24

• Manufacturer Part Number: PCM1604
• Description: 24-Bit, 192kHz Sampling,6-Channel, Enhanced Multi-Level, Delta-Sigma DIGITAL-TO-ANALOG CONVERTER
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

REGISTER 12
GPOx
GPOE
OVER
®
General Purpose Logic Output
Where: x = 1 through 6, corresponding to pins GPO1 through GPO6.
These bits are Read/Write.
Default Value: 0
The general-purpose output pins, GPO1 through GPO6, are enabled by setting GPOE = 1. These pins are used
as general-purpose outputs for controlling user-defined logic functions. When general-purpose outputs are
disabled (GPOE = 0), they default to the zero-flag function, ZERO1 through ZERO6.
General Purpose Output Enable
This bit is Read/Write.
Default Value: 0
Oversampling Rate Control
This bit is Read/Write.
Default Value: 0
The OVER bit is utilized to control the total oversampling performed by the D/A converter, including the digital
interpolation filter and delta-sigma DAC. This is useful for controlling the D/A out-of-band noise spectrum, and
designing a single, fixed value low-pass filter for use with all sampling frequencies.
PCM1604, PCM1605
B15
R/W
GPOx = 0
GPOx = 1
GPOE = 0
GPOE = 1
OVER = 0
OVER = 1
IDX6
B14
IDX5
B13
Set GPOx to ‘0’.
Set GPOx to ‘1’.
General-Purpose Outputs Disabled.
Pins default to zero-flag function (ZERO1 through ZERO6).
General-Purpose Outputs Enabled.
Data written to GPO1 through GPO6 will appear at the corresponding pins.
64x oversampling for f
128x oversampling for f
IDX4
B12
IDX3
B11
IDX2
B10
S
S
IDX1
B9
96kHz, and 32x oversampling for f
96kHz, and 64x oversampling for f
24
IDX0
B8
OVER GPOE
B7
B6
GPO6
B5
GPO5
B4
S
S
> 96kHz.
> 96kHz.
GPO4
B3
GPO3
B2
GPO2 GPO1
B1
B0