Table 29-3. ftodr field descriptions, 6 fcc buffer descriptors, Fcc buffer descriptors -9 – Freescale Semiconductor MPC8260 User Manual
Page 907: Fcc transmit-on-demand register (ftodr) -9, Ftodr field descriptions -9, Fields in the ftodr are described in table 29-3
Fast Communications Controllers (FCCs)
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
Freescale Semiconductor
29-9
Fields in the FTODR are described in Table 29-3.
.
29.6
FCC Buffer Descriptors
Data associated with each FCC is stored in buffers. Each buffer is referenced by a buffer descriptor (BD).
All of the transmit BDs for an FCC are grouped into a TxBD circular table with a programmable length.
Likewise, receive BDs form an RxBD table. The user can program the start address of the BD tables
anywhere in system memory. See
.
0
1
15
Field TOD
—
Reset
0000_0000_0000_0000
R/W
R/W
Addr
0x0x11308 (FTODR1), 0x0x11328 (FTODR2), 0x0x11348 (FTODR3)
Figure 29-4. FCC Transmit-on-Demand Register (FTODR)
Table 29-3. FTODR Field Descriptions
Field
Name
Description
0
TOD
Transmit on demand
0 Normal polling.
1 The CP gives high priority to the current TxBD and begins sending the frame does without waiting
for the normal polling time to check TxBD[R]. TOD is cleared automatically.
1–15
—
Reserved, should be cleared.