EM77950 datasheet(67/102 Pages) EMC

67 / 102 page

EM77950

BB Controller

Product Specification (V1.0) 10.09.2007

• 59

(This specification is subject to change without further notice)

8.3.9 Transmit FIFO Status Register (TFSR)

This register is a read-only register. It contains the number of bytes in the TX_FIFO.

Default Value:

0x00 (TX_FIFO empty).

8.3.10

Receive FIFO Status Register (RFSR)

This register is a read-only register. It contains the number of bytes in the RX_FIFO.

Default Value:

0x00 (TR_FIFO empty).

8.3.11

Location Control Register (LCR)

This is a read and a write register.

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

LCR

SIZE

LOC 2

SIZE

LOC 1

SIZE

LOC 0

NET

LOC1

NET

LOC 0

NODE

LOC 1

NODE

LOC 0

Bits 0, 1:

NODE_LOC [0:1]

These bits determine the location of the NODE_ID parameter in the header

(the location is specified in bytes excluding preamble). The location should be

fixed for all of different kinds of packets transferred by the system. NODE_ID

must never be set to be smaller than NET_ID, if both filters are enabled.

Location

NODE LOC 1

NODE LOC 0

Bits 2, 3:

NET_LOC [0:1]

These bits determine the location of the NET_ID parameter in the header (the

location is specified in bytes excluding the Preamble). The location should be

fixed for all the different kinds of packets transferred by the system.

Location

NET LOC 1

NET LOC 0

EM77950 Datasheet(PDF) 67 Page - ELAN Microelectronics Corp

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