MX98728EC View Datasheet(PDF) - Macronix International

Part Name

Description

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MX98728EC

GMAC SINGLE CHIP 10/100 FAST ETHERNET CONTROLLER FOR GENERIC APPLICATION

Macronix International 

MX98728EC

Boundary Page Pointer Register: BP (Reg.0Bh/0Ah), R/W, default=x000h

Bit

0A.7-0,

0B.3-0

Symbol

BP[11:0]

Description

Boundary Page Pointer between the tx/rx buffers: page TLBP[11:0] to page

BP[11:0] is the tx buffer. Page BP[11:0] to page RHBP[11:0] is the rx buffer.

BP[11:0] is mapped to MA[19:8]. The MSB is the Reg0BH.3 bit. The LSB is the

Reg0AH.0 bit.

TX Low Boundary Page Pointer Register: TLBP (Reg.0Dh/0Ch), R/W, default=x000h

Bit

0D.3-0,

Symbol

TLBP[11:0]

Description

TX Low Boundary Page Pointer : The TX packet buffer is defined as between

TLBP [11:0] and BP [11:0].The MSB is the Reg0Dh.3 bit.The LSB is the Reg0Ch.0

bit.

Transmit Buffer Write Page Pointer Register:TWP (Reg.0Fh/0Eh), R/W, default=x000h

Bit

0E.7-0,

0F.3-0

Symbol

TWP[11:0]

Description

Transmit Buffer Write Page Pointer: TWP[11:0] are mapped to MA[19:8] with the

same bit ordering. The MSB is the Reg0Fh.3 bit. The LSB is the Reg0Eh.0 bit.

TWP is normally controlled by the device driver. An internal Byte Counter

(TWPBC) is associated with this page register.

Reserved Register: (Reg11h/10h), default=x000h

Bit

reserved

Symbol

Description

not used

Transmit Buffer Read Page Pointer Register: TRP (Reg.13h/12h), R/W, default=x000h

Bit

12.7-0,

13.3-0

Symbol

TRP[11:0]

Description

The Page Index of the Transmit Buffer Read Pointer: Current transmit read page

pointer. The MSB is the Reg13h.3 bit. The LSB is the Reg12h.0 bit. TRP is

controlled by GMAC only. An internal Byte Counter (TRPBC) is associated with

this page register.

P/N:PM0723

REV. 1.0, JUL. 13, 2000

15

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