AX88180 datasheet(14/47 Pages) ASIX

14 / 47 page

AX88180

ASIX ELECTRONICS CORPORATION

MEMBASE

Set MEMBAS6 = 0x0010

TX buffer area

(3840 bytes)

Registers area

(256 bytes)

RX buffer area

(4096 bytes)

Figure 5: 16-bit mode memory mapping

The following is an example to indicate how to define a new window base address in 16-bit mode by configuring the

MEMBAS6 register. If AX88180 is allocated at the memory base address 0x20_0000 by hardware (i.e. the MEMBASE

should write 0x0010 to the MEMBAS6 register (offset 0x20_0006). In this case, the TX buffer area will be allocated from

0x20_1000 to 0x20_1EFF; the registers area will be allocated from 0x20_1F00 to 0x20_1FFF and the RX buffer area will

be allocated from 0x20_2000 to 0x20_2FFF. (Note: AX88180 only decodes low 16-bit address)

3.10 EEPROM Format

AX88180 will auto-load data from EEPROM device after hardware reset. If the EEPROM device is not attached, the

loading operation will be discarded. The EEPROM mainly provides MAC address information and CIS information if it is

used in PCMCIA environment. Below table is the format if EEPROM device is employed. Note: If the MAC address is 12

34 56 78 9A BC (MSB-LSB) then driver should set MACID0=0x9ABC, MACID1=0x5678 and MACID2=0x1234.

Address

16-bits data Description

Pointer to starting address of CIS area. Set this field to 0x0070 to shorten the download EEPROM if there is

no CIS needed. AX88180 only supports the 16-bit mode of 93C56, thus the max value of this field is

0x007F. This field should not be set to 0x0000 or 0xFFFF; otherwise, AX88180 will not recognize the

EEPROM during hardware reset.

MACID0 data

MACID1 data

MACID2 data

Reserved, keep all 0’s

Bit0: When GPIO0 is set to ‘1’ in reset stage, this bit indicates AX88180 whether it is in the environment of

PCMCIA.

0 = General 16-bit mode,

1= Special for PCMCIA environment of 16-bit mode.

Bit1: must be ‘0’

Bit2: 1 = set RGMII mode by EEPROM, 0 = none. (The setting will be cleared when software resets)

Bit3: 1 = set Gigabit mode by EEPROM, 0=none (The setting will be cleared when software resets)

Others bits must set to 0s

6 ~ 11

Reserved, keep all 0’s

12 ~ 127

CIS area, if AX88180 is used in PCMCIA system, otherwise set them to all ‘0s’

Registers area (xx_1F00 ~ 1FFF)

RX buffer area (xx_2000 ~ 2FFF)

Base address (xx_0000)

New window base address (xx_1000)

TX buffer area (xx_1000 ~ 1EFF)

Base address + 6 (xx_0006)

AX88180 Datasheet(PDF) 14 Page - ASIX Electronics Corporation

AX88180 Datasheet(HTML) 14 Page - ASIX Electronics Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

Datasheet Download

Link URL