NXP Semiconductors PXN2020, Справочное руководство, Страница: 464 / 1376

Error Correction Status Module (ECSM)
PXN20 Microcontroller Reference Manual, Rev. 1
19-4 Freescale Semiconductor
Offset: ECSM_BAS 0x0024 Access: User read/write
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R FXS
BE0
FXS
BE1 FXS
BE2 FXS
BE3 0 0 FXS
BE6 FXS
BE7 RBEN WBEN ACC
ERR
0 0 0 0 0
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 19-1. FEC Burst Optimization Master Control Register (FBOMCR)
Table 19-3. FBOMCR Field Descriptions
Field Description
FXSBEn
[0:7]
FEC XBAR slave burst enable. FXSBEn enables bursting by the FEC interface to the XBAR slave port
controlled by that respective FXSBEn bit. If FXSBEn is asserted, then that XBAR slave port enabled by
the bit can accept the bursts allowed by RBEN and WBEN. Otherwise, the FEC interface will not burst to
the XBAR slave port controlled by that respective FXSBEn bit. Read bursts from that XBAR slave port are
enabled by RBEN. Write bursts to that XBAR slave port are enabled by WBEN.
FXSBE0 = Burst enable for haddr[31:29] = 3'h0
FXSBE1 = Burst enable for haddr[31:29] = 3'h1
FXSBE2 = Burst enable for haddr[31:29] = 3'h2
FXSBE3 = Burst enable for haddr[31:29] = 3'h3
FXSBE4 = Burst enable for haddr[31:29] = 3'h4
FXSBE5 = Burst enable for haddr[31:29] = 3'h5
FXSBE6 = Burst enable for haddr[31:29] = 3'h6
FXSBE7 = Burst enable for haddr[31:29] = 3'h7
RBEN Global read burst enable from XBAR slave port designated by FXSBEn
0 Read bursting from all XBAR slave ports is disabled.
1 Read bursting is enabled from any XBAR slave port whose FXSBEn bit is asserted.
WBEN Global write burst enable to XBAR slave port designated by FXSBEn
0 Write bursting to all XBAR slave ports is disabled.
1 Write bursting is enabled to any XBAR slave port whose FXSBEn bit is asserted.
ACCERR Accumulate error - This bit determines whether an error response for the first half of the write burst is
accumulated to the second half of the write burst or discarded. In order to complete the burst, the FEC
interface to the system bus responds by indicating that the first half of the burst completed without error
before it actually writes the data so that it can fetch the second half of the write data from the FIFO. When
actually written onto the system bus, the first half of the write burst can have an error. Because this half
initially responded without an error to the FIFO, the error is discarded or accumulated with the error
response for the second half of the burst.
0 Any error to the first half of the write burst is discarded.
1 Any actual error response to the first half of the write burst is accumulated in the second half's response.
In other words, an error response to the first half will be seen in the response to the second half, even
if the second half does not error.