CONTROL_MODULE Registers
9.3.31 gmii_sel Register (offset = 650h) [reset = 0h]
gmii_sel is shown in
and described in
.
Figure 9-34. gmii_sel Register
31
30
29
28
27
26
25
24
Reserved
R-0h
23
22
21
20
19
18
17
16
Reserved
R-0h
15
14
13
12
11
10
9
8
Reserved
R-0h
7
6
5
4
3
2
1
0
rmii2_io_clk_en
rmii1_io_clk_en
rgmii2_idmoe
rgmii1_idmode
gmii2_sel
gmii1_sel
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 9-41. gmii_sel Register Field Descriptions
Bit
Field
Type
Reset
Description
31-8
Reserved
R
0h
7
rmii2_io_clk_en
R/W
1h
0: RMII Reference Clock Output mode. Enable RMII clock to be
sourced from PLL.
1: RMII Reference Clock Input mode. Enable RMII clock to be
sourced from chip pin.
See "Silicon Revision Functional Differences and Enhancements" for
differences in operation based on AM335x silicon revision.
6
rmii1_io_clk_en
R/W
1h
0: RMII Reference Clock Output mode. Enable RMII clock to be
sourced from PLL
1: RMII Reference Clock Input mode. Enable RMII clock to be
sourced from chip pin
See "Silicon Revision Functional Differences and Enhancements" for
differences in operation based on AM335x silicon revision.
5
rgmii2_idmode
R/W
1h
RGMII2 Internal Delay Mode
0: Reserved
1: No Internal Delay
See "Silicon Revision Functional Differences and Enhancements" for
differences in operation based on AM335x silicon revision.
4
rgmii1_idmode
R/W
1h
RGMII1 Internal Delay Mode
0: Reserved
1: No Internal Delay
See "Silicon Revision Functional Differences and Enhancements" for
differences in operation based on AM335x silicon revision.
3-2
gmii2_sel
R/W
0h
00: Port2 GMII/MII Mode
01: Port2 RMII Mode
10: Port2 RGMII Mode
11: Not Used
1-0
gmii1_sel
R/W
0h
00: Port1 GMII/MII Mode
01: Port1 RMII Mode
10: Port1 RGMII Mode
11: Not Used
795
SPRUH73H – October 2011 – Revised April 2013
Control Module
Copyright © 2011–2013, Texas Instruments Incorporated