
10
Maxim Integrated
Dual Automotive, Audio Line Drivers
with I2C Control and Diagnostic
MAX13325/MAX13326
Configuration Register
DIAG: Set DIAG to 1 to enable diagnostic mode. Write '0' to disable diagnostic mode.
ENABLE: Set ENABLE bit to 1 to enable the device. Write ‘0’ disables the device. Low on the SHDN pin overrides the
ENABLE bit.
MUTE: Set the MUTE bit to 1 to mute both the output channels. Output is low impedance when in mute. Low on the
MUTE pin input overrides the MUTE bit.
CPOFF: Set the CPOFF bit to 1 to turn off the charge pump. CHOLD pin must be externally supplied (see the VCPH
parameter in the Electrical Characteristics table). Charge pump is enabled when CPOFF = 0.
OLDL: Write 1 to the OLDL bit to initiate the open-load detection for the left channel. To run OLDL again, write ‘0’ and
‘1’ again.
OLDR: Write 1 to the OLDR bit to initiate the open-load detection for the right channel. To run OLDR again, write ‘0’
and ‘1’ again.
CPF[1:0]: Sets the frequency of the charge pump.
Command Byte Register
RETRYR: The right-channel power amplifier switches off after a fault condition. Write ‘1’ to turn it back on after the fault
condition.
RETRYL: The left-channel power amplifier switches off after a fault condition. Write ‘1’ to turn on the left-channel power
amplifier after the fault condition.
Table 2. Configuration Register Format
Table 3. Command Byte Register Format
Table 2a. Charge-Pump Frequency Bits
FUNCTION
ADDRESS
CODE (HEX)
REGISTER DATA
POR STATE
(HEX)
D7
D6
D5
D4
D3
D2
D1
D0
Configuration
Register
0x00
DIAG
ENABLE
MUTE
CPOFF
OLDL
OLDR
CPF1
CPF0
0x00
FUNCTION
ADDRESS
CODE (HEX)
REGISTER DATA
POR STATE
(HEX)
D7
D6
D5
D4
D3
D2
D1
D0
Command Byte
Register
0x01
RETRYL
RETRYR
x
0x00
CPF1
CPF0
FREQUENCY (kHz)
0
333
0
1
190
1
0
426
1
260