Cypress S6J3200 Series, Manual

Page: 716 / 1355

CHAPTER 21:Ethernet MAC
S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G 715
4.60.
Carrier Sense Errors Register (ETHERNETn_crs_errors)
Description of Carrier Sense Errors register is shown.
REGISTER_NAME ETHERNETn_crs_errors
OFFSET 0x14C
ACCESS_SIZE W
MULTIPLE
NUMERIC_TYPE
OTHER
BIT_OFFSET 31 30 29 28 27 26 25 24
BIT_NAME Reserved
ACCESS_TYPE R0,WX
PROT_TYPE Wp
INITIAL_VALUE 0x00
BIT_OFFSET 23 22 21 20 19 18 17 16
BIT_NAME Reserved
ACCESS_TYPE R0,WX
PROT_TYPE Wp
INITIAL_VALUE 0x00
BIT_OFFSET 15 14 13 12 11 10 9 8
BIT_NAME Reserved count[9:8]
ACCESS_TYPE R0,WX R,WX
PROT_TYPE Wp
INITIAL_VALUE 0x00 0x0
BIT_OFFSET 7 6 5 4 3 2 1 0
BIT_NAME count[7:0]
ACCESS_TYPE R,WX
PROT_TYPE Wp
INITIAL_VALUE 0x00
[bit31:10] Reserved
Always read "0". Writing has no effect.
[bit9:0] count: Carrier sense errors
A 10-bit register counting the number of frames transmitted where carrier sense was not seen during
transmission or where carrier sense was de-asserted after being asserted in a transmit frame without
collision (no under run). Only incremented in half duplex mode. The only effect of a carrier sense error
is to increment this register. The behaviour of the other statistics registers is unaffected by the detection
of a carrier sense error.