Datasheet

MAX13335E/MAX13336E
Dual Automotive Differential Audio Receivers
with I
2
C Control and Diagnostics
19
Diagnostic Register 1 (DIAG1)
The Diagnostic registers, DIAG0 and DIAG1, program the state of the four diagnostic I/O ports D_. The diagnostic ports
can be programmed to operate in one of the four states:
1) Setting D_[3:0] = 0000 disables the corresponding diagnostic I/O.
2) Setting D_[3:0] = 0001 to 1101 enables the internal current source (40FA to 705FA) and voltage sensing. The volt-
age sensing utilizes a window comparator with an upper threshold of 1.94V and a lower threshold of 0.92V (see the
Diagnostic Configurations section).
3) Setting D_[3:0] = 1110 enables voltage sensing only.
4) Setting D_[3:0] = 1111 enables the internal diode to ground.
Table 3. Diagnostic I/O Port States
ADDRESS: 0x05
MODE: R/W
BIT 7 6 5 4 3 2 1 0
NAME
D3[3] D3[2] D3[1] D3[0] D2[3] D2[2] D2[1] D2[0]
POR
0 0 0 0 0 0 0 0
D_[3:0] FUNCTION
0000
Diagnostic output disabled.
0001
Enables the 40FA current source and voltage sense.
0010
Enables the 97FA current source and voltage sense.
0011
Enables the 154FA current source and voltage sense.
0100
Enables the 210FA current source and voltage sense.
0101
Enables the 265FA current source and voltage sense.
0110
Enables the 320FA current source and voltage sense.
0111
Enables the 375FA current source and voltage sense.
1000
Enables the 430FA current source and voltage sense.
1001
Enables the 485FA current source and voltage sense.
1010
Enables the 540FA current source and voltage sense.
1011
Enables the 595FA current source and voltage sense.
1100
Enables the 650FA current source and voltage sense.
1101
Enables the 705FA current source and voltage sense.
1110
Enable voltage sense. The current source is disabled.
1111
Enables the diode. The current source and voltage sense are disabled.