PC87413 datasheet(132/257 Pages) NSC

132 / 257 page

6.0 ACCESS.bus Interface (Continued)

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132

Revision1.2

6.3.7

Access Lock Configuration 1 Register (ACCLCF1)

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

Power Well: VSB

Location:

Offset 05h

Type:

R/W

Bit

76543210

Name

CONFALOK

Reserved

KBCALOK SER1ALOK SER2ALOK PARPALOK FDCALOK

Reset

00000000

Bit

Description

CONFALOK (Configuration Access Lock). When set to 1, this bit disables LPC bus access to the Device

Configuration module and locks the module for use by ACCESS.bus only. If the module is accessed through

the LPC bus, it responds according to the setting of the ACCLMD ﬁeld in the ACBCFG register (see Section

6.3.3 on page 128); in addition, the ACCLVIOL bit in ACBCST is set (see Section 6.3.2 on page 127).

0: Module opened for LPC access (default)

1: Module locked for LPC access and opened for use by ACCESS.bus only

6-5

Reserved.

KBCALOK (Keyboard/Mouse Controller Access Lock). When set to 1, this bit disables LPC bus access to

the Keyboard/Mouse Controller module and locks the module for use by ACCESS.bus only. If the module is

accessed through the LPC bus, it responds according to the setting of the ACCLMD ﬁeld and the ACCLVIOL

bit (see CONFALOK bit). 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)

SER1ALOK (Serial Port 1 Access Lock). When set to 1, this bit disables LPC bus access to the Serial Port

1 module and locks the module for use by ACCESS.bus only. If the module is accessed through the LPC bus,

it responds according to the setting of the ACCLMD ﬁeld and the ACCLVIOL bit (see CONFALOK bit). 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), of its fast-enable bit (SER1DIS bit in the SIOCF6 register) 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)

SER2ALOK (Serial Port 2 Access Lock). When set to 1, this bit disables LPC bus access to the Serial Port

2 module and locks the module for use by ACCESS.bus only. This bit behaves like the SER1ALOK 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)

PARPALOK (Parallel Port Access Lock). When set to 1, this bit disables LPC bus access to the Parallel Port

module and locks the module for use by ACCESS.bus only. This bit behaves like the SER1ALOK 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)

FDCALOK (Floppy Disk Controller Access Lock). When set to 1, this bit disables LPC bus access to the

Floppy Disk Controller module and locks the module for use by ACCESS.bus only. This bit behaves like the

SER1ALOK 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)

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