©2009 CADEKA Microcircuits LLC

www.cadeka.com

26

Data Sheet

Table 20. Performance Control Settings

performance_control <2:0>

Power Dissipation

100

-40% (lower performance)

101

-30%

110

-20%

111

-10%

000 (default)

Nominal

001

Do not use

010

Do not use

011

Do not use

The

ext_vcm_bc register controls the driving strength in the buffer supplying the voltage on the VCM pin. If this pin is

not in use, the buffer can be switched off. If current is drawn from the VCM pin, the driving strength can be increased

to keep the voltage on this pin at the correct level.

Table 21. External Common Mode Voltage Buffer Driving Strength

ext_vcm_bc <1:0>

VCM Buffer Driving Strength

00

Off (VCM floating)

01 (default)

Low

10

High

11

Max