Maxim Integrated DS33Z41 User Manual
Page 130

DS33Z41 Quad IMUX Ethernet Mapper
130 of 167
Register Name:
SU.MMCCTRL
Register Description:
MAC MMC Control Register
Register Address:
0100h (indirect)
0100h:
Bit
# 31 30 29 28 27 26 25 24
Name Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Default
0 0 0 0 0 0 0 0
0101h:
Bit
# 23 22 21 20 19 18 17 16
Name Reserved Reserved Reserved
Reserved Reserved Reserved Reserved Reserved
Default
0 0 0 0 0 0 0 0
0102h:
Bit
# 15 14 13 12 11 10 09 08
Name Reserved
Reserved
MXFRM10
MXFRM9 MXFRM8 MXFRM7 MXFRM6 MXFRM5
Default
0 0 1 0 1 1 1 1
0103h:
Bit
# 07 06 05 04 03 02 01 00
Name MXFRM4
MXFRM3
MXFRM2
MXFRM1
MXFRM0 Reserved Reserved Reserved
Default
0 1 1 1 0 0 1 0
Bits 13 to 3: Maximum Frame Size (MXFRM10 to MXFRM0). These bits indicate the maximum packet size
value. All transmitted frames larger than this value are counted as long frames.
Bit 1: Reserved. Note that this bit must be written to a “1” for proper operation.