Led Interface; Led Modes; Table 2.2 Led Mode And Function Summary - Renesas R-IN32M4-CL2 User Manual

R-IN32M4-CL2 User's Manual Gigabit Ethernet PHY Edition
2.3

LED Interface

The polarity of the LED outputs is programmable and can be changed using register 17E2, bits 13:10. The default
polarity is active low.
It provides four LED signals per port, LED0 through LED3. The mode and function of each LED signal can be
configured independently.
Caution: LED number is listed using the convention, LED<LED#>_<Port#>.
2.3.1

LED Modes

Each LED pin can be configured to display different status information that can be selected by setting the LED mode
in register 29. The default LED state is active low and can be changed by modifying the value in register 17E2, bits 13:10.
The blink/pulse stretch is dependent on the LED behavior setting in register 30.
The following table provides a summary of the LED modes and functions. The modes listed are equivalent to the
setting used in register 29 to configure each LED pin.

Table 2.2 LED Mode and Function Summary

Mode Function Name
0 Link/Activity
1 Link1000/Activity
2 Link100/Activity
3 Link10/Activity
4 Link100/1000/Activity
5 Link10/1000/Activity
6 Link10/100/Activity
7 Reserved
8 Duplex/Collision
9 Collision
R18UZ0043EJ0100
Mar 4, 2016
1: No link in any speed on any media interface.
0: Valid link at any speed on any media interface.
Blink or pulse-stretch = Valid link at any speed on any media interface with activity present.
1: No link in 1000BASE-T.
0: Valid 1000BASE-T.
Blink or pulse-stretch = Valid 1000BASE-T link with activity present.
1: No link in 100BASE-TX.
0: Valid 100BASE-TX.
Blink or pulse-stretch = Valid 100BASE-TX link with activity present.
1: No link in 10BASE-T.
0: Valid 10BASE-T link.
Blink or pulse-stretch = Valid 10BASE-T link with activity present.
1: No link in 100BASE-TX or 1000BASE-T.
0: Valid 100BASE-TX or 1000BASE-T link. Blink or pulse- stretch = Valid 100BASE-TX or
1000BASE-T link with activity present.
1: No link in 10BASE-T or 1000BASE-T.
0: Valid 10BASE-T or 1000BASE-T link.
Blink or pulse-stretch = Valid 10BASE-T or 1000BASE-T link with activity present.
1: No link in 10BASE-T or 100BASE-TX.
0: Valid 10BASE-T or 100BASE-TX link.
Blink or pulse-stretch = Valid 10BASE-T or 100BASE-TX link with activity present.
Reserved.
1: Link established in half-duplex mode, or no link established.
0: Link established in full-duplex mode.
Blink or pulse-stretch = Link established in half-duplex mode but collisions are present.
1: No collision detected.
Blink or pulse-stretch = Collision detected.
LED State and Description
2. Functional Descriptions
(1/2)
Page 7 of 39