Dallas Semiconductor MAXIM DS3112 Manual page 81

Bits 8 to 11: Repetitive Pattern Length Bits 5 (RPL0 to RPL3). RPL0 is the LSB and RPL3 is the MSB of a
nibble that describes the how long the repetitive pattern is. The valid range is 17 (0000) to 32 (1111). These bits are
ignored if the receive BERT is programmed for a pseudorandom pattern. To create repetitive patterns less than 17
bits in length, the user must set the length to an integer number of the desired length that is less than or equal to 32.
For example, to create a 6-bit pattern, the user can set the length to 18 (0001) or to 24 (0111) or to 30 (1101).
Repetitive Pattern Length Map
Length Code
17 Bits 0000
21 Bits 0100
25 Bits 1000
29 Bits 1100
Bit 13: Interrupt Enable for Counter Overflow (IEOF). Allows the receive BERT to cause an interrupt if either
the Bit Counter or the Error Counter overflows (
0 = interrupt masked
1 = interrupt enabled
Bit 14: Interrupt Enable for Bit Error Detected (IEBED). Allows the receive BERT to cause an interrupt if a bit
error is detected (Figure
0 = interrupt masked
1 = interrupt enabled
Bit 15: Interrupt Enable for Change of Synchronization Status (IESYNC). Allows the receive BERT to cause
an interrupt if there is a change of state in the synchronization status (i.e., the receive BERT either goes into or out
of synchronization) ( Figure 8-1
0 = interrupt masked
1 = interrupt enabled
Length Code
18 Bits 0001
22 Bits 0101
26 Bits 1001
30 Bits 1101
8-1).
).
Length
19 Bits
23 Bits
27 Bits
31 Bits
Figure 8-1 ).
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Code Length
0010 20 Bits
0110 24 Bits
1010 28 Bits
1101 32 Bits
DS3112
Code
0011
0111
1011
1111