Table 108: Status Flags For Synchronous Serial Receive Channel; Table 109: Option Flags For Synchronous Serial Receive Channel; Table 110: Status Flags For Synchronous Serial Transmit Channel; Table 111: Option Flags For Synchronous Serial Transmit Channel - Broadcom BCM1250 User Manual

BCM1250/BCM1125/BCM1125H
C
ONTROL AND
Bits Name
55:51 reserved
56 crc_error
57 abort
58 octet_error
59 longframe_error
60 shortframe_error This bit is set if the size of the received packet is shorter than the minimum frame size.
61 overun_error
62 good
63 SOP
Bits Name

Table 110: Status Flags for Synchronous Serial Transmit Channel

Bits Name
62:51 ignored Preserved when the descriptor is written.
63 Flag This bit is cleared when the descriptor is written. Software can set this bit in descriptors associated
with the start of a packet and the bit will be cleared when the packet has been transmitted. (Unlike
the Ethernet there is no requirement that this bit be set for a SOP).

Table 111: Option Flags for Synchronous Serial Transmit Channel

Bits Name
0 reserved Reserved
1 append CRC If this bit is set the computed CRC will be appended to the packet.
2 append PAD If this bit is set the packet will be padded to the minimum packet size.
3 abort If this bit is set the packet will be ended with an abort instead of a standard flag.
Page 174 Section 7: DMA
F B S
LAG ITS FOR

Table 108: Status Flags for Synchronous Serial Receive Channel

Receive Status Flags
Reserved
This bit is set if the received packet has a bad CRC.
This bit is set if the received packet ended with the abort flag.
This bit is set if the size of the received packet was not a multiple of 8 bits.
This bit is set if the size of the received packet is bigger than the maximum frame size.
This bit is set if the received packet over ran the FIFO and is therefore invalid.
This bit is set if the received packet has no errors.
This bit is set to indicate the start of the packet. Software should ensure this bit is clear when
it sets up the descriptor, the DMA controller will only set it when packet reception has been
completed.

Table 109: Option Flags for Synchronous Serial Receive Channel

Description
Transmit Status Flags
Transmit Commands
B r oadco m C orp or ati on
S
YNCHRONOUS ERIAL
Description
Receive Options
None
Description
Description
User Manual
I
NTERFACE
Document 1250_1125-UM100CB-R
10/21/02