These bits are
only used when URDTEN = 1. This register holds the data to
transmit when a Transmit Underrun condition occurs.
Table 22-6 summarizes the valid data fields for
possible values of the MODE32, MODE16 and WLENGTH[4:0] bits.Table 22-6. MODE32, MODE16 and
WLENGTH[4:0] Data Fields| MODE32 | MODE16 | WLENGTH[4:0] | COMMUNICATION | Valid Data Field |
|---|
1 | X | 0 | 32-bit | DATA[31:0] |
0 | 1 | 0 | 16-bit | DATA[15:0] |
0 | 0 | 0 | 8-bit | DATA[07:0] |
X | X | 16 < N < 31 | (N+1)-bit | DATA[31:(31-N)] |
X | X | 8 < N < 15 | (N+1)-bit | DATA[15:(15-N)] |
X | X | 1 < N < 7 | (N+1)-bit | DATA[07:(07-N)] |
