TMC2005 Просмотр технического описания (PDF) - SMSC -> Microchip

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производитель

TMC2005

5 Port HUB Controller Device

SMSC -> Microchip 

Operating Mode Setup

FEATURE

Data rate

setup

NAME

CKM [0:2]

INPUT/

OUTPUT

INPUT

DESCRIPTION

Terminal to setup the data rate of TMC2005.

CKM2 CKM1 CKM0 DIVISOR MULTIPLIER SPEED

0 0 0 16

x1

156.25 Kbps

00 1 8

x1

312.5 Kbps

01 0 4

x1

625 Kbps

01 1 2

x1

1.25 Mbps

10 0 1

x1

2.5 Mbps

10 1 1

x2

5 Mbps

1 1 0 Reserved Reserved Reserved

11 1 1

x4

10 Mbps

Noise cut

mode

Big jitter

mode

nMBA

nMBB

nMBE

nBJA

nBJB

nBJE

Open drain nEXTOD

mode

INPUT

INPUT

INPUT

External clock is 20MHz.

Refer to “VARIOUS SETUP”

0: Cut off noise from received data

1: Don’t cut off noise

Setup “0” normally.

Setup a jitter filter feature.

Select a pulse as reference phase used by DPLL.

0: 2nd pulse (big jitter mode)

1: 1st pulse (normal mode)

Setup a the use of EXTTX port.

0: Set EXTTX as open drain output and use as Ext.

1: Set EXTTX as normal output and use as 5th port.

PLL

FEATURE

NAME

LP

RO

AGS

INPUT/

OUTPUT

OUTPUT

OUTPUT

INPUT

DESCRIPTION

Using PLL: Connect to an external condenser “C1”

for loop filter.

Using no PLL: must be open.

VCO output

Using PLL: Connect to an external resistor “R0” for

loop filter.

Using no PLL: must be open.

Analog sense input.

nPLLTST

AVDD

INPUT

Using PLL: Connect to loop filter.

Using no PLL: Connect to ground.

Test pin for PLL.

Must always connect to VDD.

Analog power supply

AVSS

Using PLL: Analog power supply. There are some

limits on PCB pattern.

Using no PLL: Power supply (+5V) same as VDD1~6.

Analog ground

Using PLL: Analog ground. There are some limits on

PCB pattern.

Using no PLL: Use a ground same as VSS1~8.

SMSC DS – TMC2005

Page 9

Rev. 10/24/2000

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