MK50H27(1997) 데이터 시트보기 (PDF) - STMicroelectronics

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MK50H27
(Rev.:1997)

Signalling System 7 Link Controller

STMicroelectronics 

4.2.4 Receive Descriptor Ring Pointer

111 111 000 00 000 0 0

543 210 987 65 432 1 0

MK50H27

IADR + 36

0

RLEN 0 0 0 0

RDRA<23:16>

IADR + 38

RDRA<15:00>

0

BIT

15

14:12

NAME

0

RLEN

DESCRIPTION

Reserved, must be written as a zero.

RECEIVE RING LENGTH is the number of entries in the Receive

Descriptor Ring expressed as a power of two.

RLEN

0

1

2

3

4

5

6

7

Number of Entries

1

2

4

8

16

32

64

128

11:08

0

07:00/15:00 RDRA

Reserved, must be written as zeroes.

RECEIVE DESCRIPTOR RING ADDRESS is the base address

(lowest address) of the Receive Descriptor Ring. The Receive De-

scriptor Address must begin on a word boundary.

4.2.5 Transmit Descriptor Ring Pointer

111 111 000 00 000 0 0

543 210 987 65 432 1 0

IADR + 40

0

TLEN

0000

TDRA<23:16>

IADR + 42

TDRA<15:00>

0

31/56

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