DP83261AVF datasheet(54/132 Pages) NSC

54 / 132 page

60 Control Information (Continued)

Programmable Group Address MAP (PGM0 – PGM1F)

If the first 40 bits of a long DA DA(47 – 8) match the GLA or if the first 8 bits of a short DA DA(15 – 8) match the GSA the last 8

bits of the DA are used as an index into PGM

The 8-bit index into PGM can be viewed in two different ways

1 As 8 bits selecting one of 256 bits where the hexidecimal equivalent of DA(7 – 0) can be used as the index For example a DA

with the last byte as A2h indexes PGM(A2)

2 As 5 bits DA(7 – 3) selecting the byte (PGM0 to PGM1F) and three bits DA(2 – 0) selecting one of 8 bits within a byte For

example a DA with the last byte of A2h (1010 0010b) selects PGM14 bit 2

It is possible to disable Long and Short Group Addressing by filling the Group Address Map with 0’s

In REV 1 of the BMAC device PGM(00) to PGM(7F) are hardwired to 0 and are not accessible via the Control Interface This

implies that group addresses with DA(7) e 0 can not be recognized

In REV 2 of the BMAC device PGM(00) to PGM(7F) are set equal to PGM(80) to PGM(FF) and are accessible via the Control

Interface This implies that DA(7) of group addresses is a don’t care

ACCESS RULES

Address

Read

Write

70 – 7Fh

Stop Mode

PGM0

PGM(7)

PGM(6)

PGM(5)

PGM(4)

PGM(3)

PGM(2)

PGM(1)

PGM(0)

PGM1

PGM(F)

PGM(E)

PGM(D)

PGM(C)

PGM(B)

PGM(A)

PGM(9)

PGM(8)

PGM2

PGM(17)

PGM(16)

PGM(15)

PGM(14)

PGM(13)

PGM(12)

PGM(11)

PGM(10)

PGM3

PGM(1F)

PGM(1E)

PGM(1D)

PGM(1C)

PGM(1B)

PGM(1A)

PGM(19)

PGM(18)

PGM4

PGM(27)

PGM(26)

PGM(25)

PGM(24)

PGM(23)

PGM(22)

PGM(21)

PGM(20)

PGM5

PGM(2F)

PGM(2E)

PGM(2D)

PGM(2C)

PGM(2B)

PGM(2A)

PGM(29)

PGM(28)

PGM6

PGM(37)

PGM(36)

PGM(35)

PGM(34)

PGM(33)

PGM(32)

PGM(31)

PGM(30)

PGM7

PGM(3F)

PGM(3E)

PGM(3D)

PGM(3C)

PGM(3B)

PGM(3A)

PGM(39)

PGM(38)

PGM8

PGM(47)

PGM(46)

PGM(45)

PGM(44)

PGM(43)

PGM(42)

PGM(41)

PGM(40)

PGM9

PGM(4F)

PGM(4E)

PGM(4D)

PGM(4C)

PGM(4B)

PGM(4A)

PGM(49)

PGM(48)

PGMA

PGM(57)

PGM(56)

PGM(55)

PGM(54)

PGM(53)

PGM(52)

PGM(51)

PGM(50)

PGMB

PGM(5F)

PGM(5E)

PGM(5D)

PGM(5C)

PGM(5B)

PGM(5A)

PGM(59)

PGM(58)

PGMC

PGM(67)

PGM(66)

PGM(65)

PGM(64)

PGM(63)

PGM(62)

PGM(61)

PGM(60)

PGMD

PGM(6F)

PGM(6E)

PGM(6D)

PGM(6C)

PGM(6B)

PGM(6A)

PGM(69)

PGM(68)

PGME

PGM(77)

PGM(76)

PGM(75)

PGM(74)

PGM(73)

PGM(72)

PGM(71)

PGM(70)

PGMF

PGM(7F)

PGM(7E)

PGM(7D)

PGM(7C)

PGM(7B)

PGM(7A)

PGM(79)

PGM(78)

DP83261AVF Datasheet(PDF) 54 Page - National Semiconductor (TI)

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