STPCC4 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

生产厂家

STPCC4

X86 Core PC Compatible Information Appliance System-on-Chip

STMicroelectronics 

STRAP OPTIONS

3.1.3. ADPC STRAP REGISTER 2 CONFIGURATION

Strap2

7

See Table

below

Access = 0022h/0023h

Regoffset = 04Ch

6

5

4

3

2

1

0

Rsv

MD[20]

MD[19]

MD[18]

See Table

below

Rsv

This register defaults to the values sampled on MD pins after reset

Bit Number Sampled

Bits 7

Bit 6-5

Bits 4

Bit 3

Bit 2

Bit 1

Bit 0

Mnemonic

Rsv

MD[40]

Rsv

MD[20]

Rsv

Rsv

MD[17]

Rsv

Rsv

Description

For the parts referenced STPCC4, Reserved

For the parts referenced STPCC5, this bit reflects the value sampled on

MD[40] is used is used to set the clock multiplication factor of the 486

core, as follows:

MD[40]

0

DX (X1)

1

DX2 (X2)

This strap is not readable in a register for the STPCC4.

Reserved

This bit reflects the value sampled on MD[20] pin and controls

the Dot clock (DCLK) source as follows:

0: External. DCLK pin is an input.

1: Internal. DCLK pin is an output and is connected to the

internal frequency synthesizer output. Note this bit is writeable

as well as readable.

Reserved

Reserved

For the parts referenced STPCC4, see section Section 3.1.1.bits 1:0.

For the parts referenced STPCC5.This bit is reserved and not connected

Reserved

30/93

Release 1.5 - January 29, 2002

Share Link: