F81865F View Datasheet(PDF) - Feature Integration Technology Inc.

Part Name

Description

Manufacturer

F81865F

Super IO with 6 UARTs

Feature Integration Technology Inc. 

F81865

3-2

Reserved

-

- Reserved.

0 : PCI IRQ sharing mode.

1

UR2IRQ_MODE R/W 0 1 : ISA IRQ sharing mode.

This bit is effective in IRQ sharing mode.

0 UR2IRQ_SHARE R/W

Clock Register ⎯ Index F2h

0

0 : IRQ is not sharing with other device.

1 : IRQ is sharing with other device.

Bit

Name

R/W Default

Description

7-2

Reserved

-

- Reserved.

Select the clock source for UART2.

00: 1.8432MHz.

1-0 UR2_CLK_SEL R/W 00b 01: 18.432MHz.

10: 24MHz.

11: 14.769MHz.

9bit-mode Slave Address Register ⎯ Index F4h

Bit

Name

R/W Default

Description

This byte accompanying with SADEN_UR2 will determine the given address

and broadcast address in 9-bit mode. The UART will response to both given

and broadcast address.

Follow the description to determine the given address and broadcast address:

5. given address: If bit n of SADEN_UR2 is “0”, then the corresponding bit of

SADDR_UR2 is don’t care.

6. broadcast address: If bit n of ORed SADDR_UR2 and SADEN_UR2 is “0”,

7-0

SADDR_UR2 R/W 00h

don’t care that bit. The remaining bit which is “1” is compared to the

received address.

Ex.

SADDR_UR2

0101_1100b

SADEN_UR2

1111_1001b

Given Address

0101_1xx0b

Broadcast Address

1111_11x1b

9bit-mode Slave Address Mask Register ⎯ Index F5h

Bit

Name

R/W Default

Description

This byte accompanying with SADDR_UR2 will determine the given address

and broadcast address in 9-bit mode. The UART_UR2 will response to both

given and broadcast address.

Follow the description to determine the given address and broadcast address:

7. given address: If bit n of SADEN_UR2 is “0”, then the corresponding bit of

SADDR_UR2 is don’t care.

8. broadcast address: If bit n of ORed SADDR_UR2 and SADEN_UR2 is “0”,

7:0

SADEN_UR2 R/W 00h

don’t care that bit. The remaining bit which is “1” is compared to the

received address.

Ex.

SADDR_UR2

0101_1100b

SADEN_UR2

1111_1001b

Given Address

0101_1xx0b

Broadcast Address

1111_11x1b

111

May, 2010

V0.28P

Share Link: