PC87413 datasheet(128/257 Pages) NSC

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6.0 ACCESS.bus Interface (Continued)

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128

Revision1.2

6.3.3

ACCESS.bus Configuration Register (ACBCFG)

This register controls the configuration of the ACCESS.bus Interface. On reset, it is cleared (00h).

Power Well:

VSB

Location:

Offset 01h

Type:

Varies per bit

6.3.4

ACCESS.bus Lock Control Register (ACBLKCTL)

This register controls the configuration lock of the PC8741x device. On reset, it is cleared (00h).

Power Well: VSB

Location:

Offset 02h

Type:

Varies per bit

Bit

76543210

Name

CSWRST

Reserved

ACCLMD

Reserved

ACTSTAT

Reset

00000000

Bit

Type

Description

R/W

CSWRST (Controller Software Reset). When set to ‘1’, this bit triggers a Controller Software reset

sequence (see Section 2.2.3 on page 35) and then returns to ‘0’. It always returns ‘0’ when read.

0: Normal operation (default)

1: Enable the Controller Software Reset

Reserved.

5-4

R/W

ACCLMD (Locked Module Access Mode). These bits control the behavior of the LPC Interface

whenever a locked module is accessed.

Bits

5 4

Function

0 0:

Complete cycle and generate Error SYNC; read 00h; ignore write (default).

0 1:

Complete cycle; read 00h; ignore write.

1 0:

Ignore cycle (do not generate SYNC).

:− Locked X-Bus chip-select (XCS3-XCS0): Generate Long Wait SYNC for read and write until

access lock is removed; then complete transaction normally.

− Any other locked module: Complete cycle; read 00h; ignore write.

3-1

Reserved.

R/W

ACTSTAT (Module Activation Status Conﬁguration). This bit conﬁgures the behavior of the

Activation bit (for the Legacy modules) when read through the LPC bus (index 30; see Section 3.2.3 on

page 40). When this bit is set to ‘1’ and a speciﬁc module is disabled by the bits in the ACBFDIS

returns a ‘0’ value, ignoring the actual setting of the Activation bit.

0: Activation status reflects the value of the Activation bit (default)

1: Activation status reflects the value of the Activation bit, or returns ‘0’ if either the module is locked, or

disabled by the bits in the ACBFDIS register

Bit

76543210

Name

VSBLOCK

UNLOCKM UNLOCKG

UNLOCKF

UNLOCKC

UNLOCKX

UNLOCKR

UNLOCKS

Reset

00000000

PC87413 Datasheet(PDF) 128 Page - National Semiconductor (TI)

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