zxcw8100 Diodes, Inc., zxcw8100 Datasheet - Page 19

• Manufacturer Part Number: zxcw8100
• Description: 32 Bit Stereo Direct Drive Digital Audio Amplifier
• Manufacturer: Diodes, Inc.

H bridge on
Bit 50 is used to enable the output drive to the H bridge,
this is used to control the power up sequence for the
system ensuring a safe power on:
Bit50: 0 = bridge off, 1 = bridge on
The default condition is output bridge off.
NEER & PEER FET Compensation
NEER and PEER provide compensation for fixed
switching errors within the OP FET’s. For the majority
of applications, NEER and PEER should be left set to the
default values. In order to further optimize the output
stage, for NEER use the values in the range from 00000
(default) to 01000 and for PEER use values in range
from 01000 to 10000 (default).
Auto low power
If activated then the digital silence feature is available.
Bit 61 controls the enable for auto low power:
Bit61: 0 = disabled, 1 = enable
Set pwm and speed combination
The two bits bit 62 (hspd) and bit 63 (hpwm) are used to
set up the speed and pwm methodology respectively.
Zetex recommend the use of HPWM at 1MHz for first
time users of the ZXCW8100. Full details about the use
of these modes will be available in the associated
Application document. Contact your nearest Zetex
office for full details.
Bit 62:
Bit 63:
The resultant operating modes are shown in the
following table:
ISSUE 3 - NOVEMBER 2003
1
Note: recommended mode of operation
0 = low speed
0 = RPWM
hspd
0
0
1
1
hpwm Operating mode
0
1
0
1
RPWM at 500kHz
HPWM at 1MHz
RPWM at 1MHz
HPWM at 2MHz
1 = HPWM
1 = high speed
1
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ZXCW8100S28
S E M I C O N D U C T O R S