PC87413 datasheet(133/257 Pages) NSC

133 / 257 page

6.0 ACCESS.bus Interface (Continued)

Revision 1.2

133

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6.3.8

Access Lock Configuration 2 Register (ACCLCF2)

This register controls the locking to LPC bus access of the device functional blocks. On reset, it is cleared (00h).

Power Well: VSB

Location:

Offset 06h

Type:

R/W

Bit

76543210

Name

SWCALOK

RTCALOK

XBSALOK

Reserved

XCS3ALOK XCS2ALOK XCS1ALOK XCS0ALOK

Reset

00000000

Bit

Description

SWCALOK (System Wake-up Controller Access Lock). When set to 1, this bit disables the LPC bus access

to the System Wake-up Controller module and locks the module for use by ACCESS.bus only. If the module is

accessed through the LPC bus (the SWC registers), it responds according to the setting of the ACCLMD ﬁeld

in the ACBCFG register (see Section 6.3.3 on page 128), and the ACCLVIOL bit in ACBCST is set (see Section

6.3.2 on page 127). This bit does not affect LPC access to the ACPI registers. The setting of this bit also forces

module activation regardless of the actual setting of its Activation bit (index 30; see Section 3.2.3 on page 40)

and of the setting of the global enable bit (GLOBEN bit in the SIOCF1 register).

0: Module opened for LPC access (default)

1: Module locked for LPC access and opened for use by ACCESS.bus only (see Section 3.3.2 on page 44)

RTCALOK (Real-Time Clock Access Lock). When set to 1, this bit disables the LPC bus access to the Real-

Time Clock module and locks the module for use by ACCESS.bus only. This bit behaves like the SWCALOK bit.

0: Module opened for LPC access (default)

1: Module locked for LPC access and opened for use by ACCESS.bus only (see Section 3.3.2 on page 44)

XBSALOK (X-Bus Module Access Lock). When set to 1, this bit disables the LPC bus access to the X-Bus

module and locks the module for use by ACCESS.bus only (PC87417). This bit behaves like the SWCALOK bit.

0: Module opened for LPC access (default)

1: Module locked for LPC access and opened for use by ACCESS.bus only (see Section 3.3.2 on page 44)

Reserved.

XCS3ALOK (X-Bus XCS3 Access Lock). When set to 1, this bit disables the LPC bus access to the X-Bus

devices connected to XCS3 and locks them for use by ACCESS.bus only (PC87417). This bit behaves like the

SWCALOK bit.

0: XCS3-connected devices opened for LPC access (default)

1: XCS3-connected devices locked for LPC access and opened for use by ACCESS.bus only (see Section 3.3.2 on

page 44)

XCS2ALOK (X-Bus XCS2 Access Lock). Same as XCS3ALOK bit for X-Bus devices connected to XCS2

(PC87417)

XCS1ALOK (X-Bus XCS1 Access Lock). Same as XCS3ALOK bit for X-Bus devices connected to XCS1

(PC87417)

XCS0ALOK (X-Bus XCS0 Access Lock). Same as XCS3ALOK bit for X-Bus devices connected to XCS0

(PC87417)

PC87413 데이터시트(PDF) 133 Page - National Semiconductor (TI)

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