VSC8541XMV-05 datasheet(67/101 Pages) MICROCHIP

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Registers

VMDS-10513 VSC8541-02 Datasheet Revision 4.1

4.5.1

CLKOUT Control

The CLKOUT control register configures the functionality of the CLKOUT output pin.

4.5.2

GPIO Control 2

The GPIO control 2 register configures the functionality of the COMA_MODE and LED pins.

14G

GPIO Control 2

15G–18G

Reserved

19G

Fast Link Register

20G–22G

Reserved

23G

Recovered Clock Control

24G

Reserved

25G

Enhanced LED Control

26G–30G

Reserved

Table 72 •

CLKOUT Control, Address 13G (0x0D)

Bit

Name

Access

Description

Default

CLKOUT enable

R/W

1: CLKOUT enabled.

0: CLKOUT disabled.

14:13 CLKOUT frequency select R/W

00: 25 MHz.

01: 50 MHz.

10: 125 MHz.

11: Reserved.

12:0

Reserved

Reserved.

Table 73 •

GPIO Control 2, Address 14G (0x0E)

Bit

Name

Access Description

Default

15:14

Reserved

Reserved.

COMA_MODE output enable

(active low)

R/W

1: COMA_MODE pin is an input.

0: COMA_MODE pin is an output.

COMA_MODE output data

R/W

Value to output on the COMA_MODE pin when it is

configured as an output.

COMA_MODE input data

Data read from the COMA_MODE pin.

Reserved

Reserved.

Tri-state enable for LEDs

R/W

1: Tri-state LED output signals instead of driving them

high. This allows the signals to be pulled above VDDIO

using an external pull-up resistor.

0: Drive LED bus output signals to high and low

values.

8:0

Reserved

Reserved.

Table 71 •

General Purpose Registers Space (continued)

Address

Name

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