Programming Model; Ethernet Command Set - Motorola MPC8260 PowerQUICC II User Manual

Part IV. Communications Processor Module
Table 30-2. Ethernet-Specific Parameter RAM (Continued)
1
Offset Name Width
2
0xE8 P128C Word (RMON mode only) The total number of packets (including bad packets) received
2
0xEC P256C Word (RMON mode only) The total number of packets (including bad packets) received
2
0xF0 P512C Word (RMON mode only) The total number of packets (including bad packets) received
2
0xF4 P1024C Word (RMON mode only) The total number of packets (including bad packets) received
0xF8 CAM_BUF Word Internal buffer for CAM result
0xFC Ñ Word Reserved, should be cleared.
1
Offset from FCC base: 0x8400 (FCC1), 0x8500 (FCC2) and 0x8600 (FCC3); see Section 13.5.2, ÒParameter RAM.Ó
2
32-bit (modulo 232) counters maintained by the CP; cleared by the user while the channel is disabled.

30.9 Programming Model

The core conÞgures an FCC to operate as an Ethernet controller using GFMR[MODE]. The
receive errors (collision, overrun, nonoctet-aligned frame, short frame, frame too long, and
CRC error) are reported through the RxBD. The transmit errors (underrun, heartbeat, late
collision, retransmission limit, and carrier sense lost) are reported through the TxBD.
The user should program the FDSR as described in Section 28.4, ÒFCC Data
Synchronization Registers (FDSRx),Ó with FDSR[SYN2] = 0xD5 and FDSR[SYN1] =
0x55.

30.10 Ethernet Command Set

The transmit and receive commands are issued to the CPCR; see Section 13.4, ÒCommand
Set.Ó
Before resetting the CPM, conÞgure TX_EN (RTS) to be an
input.
Transmit commands that apply to Ethernet are described in Table 30-3.
Command Description
When used with the Ethernet controller, this command violates a speciÞc behavior of an Ethernet/IEEE
STOP
802.3 station. It should not be used.
TRANSMIT
30-12
that were between 128 and 255 octets long inclusive (excluding framing bits but
including FCS octets).
that were between 256 and 511 octets long inclusive (excluding framing bits but
including FCS octets).
that were between 512 and 1023 octets long inclusive (excluding framing bits but
including FCS octets).
that were between 1024 and 1518 octets long inclusive (excluding framing bits but
including FCS octets).
NOTE
Table 30-3. Transmit Commands
MPC8260 PowerQUICC II UserÕs Manual
Description
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