DM9010BI datasheet(25/60 Pages) DAVICOM

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DM9010BI

Industrial-temperature Single Chip Ethernet Controller with General Processor Interface

Preliminary

Version: DM9010BI--DS-P01

January 12, 2010

6.32 General Purpose Control Register 2 (34H)

Bit

Name

Default

Description

7~0

GPC2

HP0,RW

General Purpose Control 2

Define the input/output direction of pins SD23~16, which are used as general

purpose pins when none 32-bit mode and external MII mode, respectively.

6.33 General Purpose Register 2 (35H)

Bit

Name

Default

Description

7~0

GPD2

HP0,RW

General Purpose Register 2 Data

When the correspondent bit of General Purpose Control Register 2 is set, the value

of the bit is reflected to pin SD23~16

When the correspondent bit of General Purpose Control Register 2 is 0, the value

of the bit to be read is reflected from correspondent pins SD23~16

6.34 General Purpose Control Register 3 (36H)

Bit

Name

Default

Description

7~0

GPC3

HP0,RW

General Purpose Control 3

Define the input/output direction of pins SD31~24, which are used as general

purpose pins when none 32-bit mode and external MII mode, respectively.

6.35 General Purpose Register 3 (37H)

Bit

Name

Default

Description

7~0

GPD3

HP0,RW

General Purpose Register 3 Data

When the correspondent bit of General Purpose Control Register 3 is set, the value

of the bit is reflected to pin SD31~24

When the correspondent bit of General Purpose Control Register 3 is 0, the value

of the bit to be read is reflected from correspondent pins SD31~24

6.36 Processor Bus Control Register (38H)

Bit

Name

Default

Description

Reserved

P0,RW

Reserved

6:5

CURR

P00,RW

Data Bus Current Driving/Sinking Capability

00: 2mA (default)

01: 4mA

10: 6mA

11: 8mA

Reserved

P0,RW

Reserved

GPIO

P0,RW

Enable Schmitt Trigger

1: Pin 35/36/37 (IOR/IOW/CS#) have Schmitt trigger capability.

Reserved

P0,RW

Reserved

IOW_SPIKE

P0,RW

Eliminate IOW spike

1: eliminate about 2ns IOW spike

IOR_SPIKE

P1,RW

Eliminate IOR spike

1: eliminate about 2ns IOR spike

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