PC87413 datasheet(107/257 Pages) NSC

107 / 257 page

5.0 X-Bus Extension (Continued)

Revision 1.2

107

www.national.com

5.4

X-BUS REGISTERS

The following abbreviations are used to indicate the Register Type:

R/W

= Read/Write.

= Read from a speciﬁc register (write to the same address is to a different register).

= Write (see above).

= Read Only.

= Write Only. Reading from the bit returns 0.

R/W1C = Read/Write 1 to Clear. Writing 1 to a bit clears it to 0. Writing 0 has no effect.

R/W1S = Read/Write 1 to Set. Writing 1 to a bit sets its value to 1. Writing 0 has no effect.

5.4.1

X-Bus Register Map

The following table lists the X-Bus registers. All these registers are VSB powered.

Offset

Mnemonic

Type

Power Well

Section

00h

XBCNF

X-Bus Conﬁguration Register.

R/W or RO

VSB

5.4.2

01h

XZCNF0

X-Bus Select 0 Conﬁguration Register.

R/W or RO

VSB

5.4.3

02h

XZCNF1

X-Bus Select 1 Conﬁguration Register.

R/W or RO

VSB

5.4.3

04h

XIRQC

X-Bus IRQ Conﬁguration Register.

R/W

VSB

5.4.4

08h

XIMA0

X-Bus Indirect Memory Address Register 0.

R/W

VSB

5.4.5

09h

XIMA1

X-Bus Indirect Memory Address Register 1.

R/W

VSB

5.4.6

0Ah

XIMA2

X-Bus Indirect Memory Address Register 2.

R/W

VSB

5.4.7

0Bh

XIMA3

X-Bus Indirect Memory Address Register 3.

R/W

VSB

5.4.8

0Ch

XIMD

X-Bus Indirect Memory Data Register.

R/W

VSB

5.4.9

0Dh

XZCNF2

X-Bus Select 2 Conﬁguration Register.

R/W or RO

VSB

5.4.3

0Eh

XZCNF3

X-Bus Select 3 Conﬁguration Register.

R/W or RO

VSB

5.4.3

0Fh

XZM0

X-Bus Select 0 Mode Register.

Varies per bit

VSB

5.4.10

10h

XZM1

X-Bus Select 1 Mode Register.

Varies per bit

VSB

5.4.10

11h

XZM2

X-Bus Select 2 Mode Register.

Varies per bit

VSB

5.4.10

12h

XZM3

X-Bus Select 3 Mode Register.

Varies per bit

VSB

5.4.10

13h

HAP0

Host Access Protect Register 0.

Varies per bit

VSB

5.4.11

14h

HAP1

Host Access Protect Register 1.

Varies per bit

VSB

5.4.11

Other

Reserved for National use.

PC87413 Datasheet(PDF) 107 Page - National Semiconductor (TI)

PC87413 Datasheet(HTML) 107 Page - National Semiconductor (TI)

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 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL