RTL8100BL-GR datasheet(26/66 Pages) REALTEK

Part #	RTL8100BL-GR

Description	SINGLE-CHIP 10/100MBPS ETHERNET CONTROLLER WITH POWER MANAGEMENT

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Manufacturer	REALTEK [Realtek Semiconductor Corp.]

Direct Link	https://www.realtek.com/en/

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RTL8100B(L)

Datasheet

Single-Chip 10/100 Ethernet Controller w/Power Management

20

Track ID: JATR-1076-21 Rev. 1.5

6.11. CONFIG 1: Configuration Register 1

(Offset 0052h, R/W)

Bit

R/W

Symbol

Description

7-6

R/W

LEDS1-0

Refer to LED PIN definition. These bits initial value come from 93C46.

5

R/W

DVRLOAD

Driver Load: Software may use this bit to make sure that the driver has been

loaded. Writing 1 is 1. Writing 0 is 0. When the command register bits IOEN,

MEMEN, and BMEN of the PCI configuration space are written, the

RTL8100B(L) will clear this bit automatically.

LWAKE active mode: The LWACT bit and LWPTN bit in CONFIG4 register

are used to program the LWAKE pin’s output signal. According to the

combination of these two bits, there may be 4 choices of LWAKE signal, i.e.,

active high, active low, positive (high) pulse, and negative (low) pulse. The

output pulse width is about 150ms.

The default value of each of these two bits is 0, i.e., the default output signal of

LWAKE pin is an active high signal.

LWACT

LWAKE output

0

1

0

Active high*

Active low

LWPTN

1

Positive pulse

Negative pulse

4

R/W

LWACT

* Default value.

3

R

MEMMAP

Memory Mapping: The operational registers are mapped into PCI memory space.

2

R

IOMAP

I/O Mapping: The operational registers are mapped into PCI I/O space.

1

R/W

VPD

Set to enable Vital Product Data: The VPD data is stored in 93C46 from within

offset 40h-7Fh.

0

R/W

PMEn

Power Management Enable:

Writable only when 93C46CR register EEM1=EEM0=1

Let A denote the New_Cap bit (bit 4 of the Status Register) in the PCI

Configuration space offset 06H.

Let B denote the Cap_Ptr register in the PCI Configuration space offset 34H.

Let C denote the Cap_ID (power management) register in the PCI Configuration

space offset 50H.

Let D denote the power management registers in the PCI Configuration space

offset from 52H to 57H.

Let E denote the Next_Ptr (power management) register in the PCI Configuration

space offset 51H.

PMEn Description

0

A=B=C=E=0, D not valid

1

A=1, B=50h, C=01h, D valid, E=0

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