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Fabricante

KB3930

Keyboard Controller

Unspecified 

KB3930 Keyboard Controller Datasheet

2.7 I/O Cell Descriptions

2.7.1 I/O Buffer Table

Cell

Description

Application

BQCZ16HIV

Schmitt trigger, 16mA Output / Sink Current, Input / Output / Pull Up

Enable(40KΩ), 5 V Tolerance.

GPIO

BQC04HIV

Schmitt trigger, 4mA Output / Sink Current, Input / Output / Pull Up Enable(40K GPIO

Ω), 5 V Tolerance

BQCW16HIV Schmitt trigger, 16mA Output / Sink Current, 5 V Tolerance, Input / Output / Pull ESB_CLK/

Up Enable

SPI_CLK

BCC16HI

16mA Output / Sink Current , 5 V Tolerance, Input / Output Enable

LPC I/F

BQC04HI

Schmitt trigger, 4mA Output / Sink Current, 5 V Tolerance, Input / Output

Enable

GPIO

IQTHI

Mixed mode IO, ADC Enable, with GPI, Input Enable

ADC, GPI

OCT04H

Mixed mode IO, DAC Enable, with GPO, 4mA Output Current, Output Enable

(For GPO function, it is not recommended to control the device powered

before KBC chip.)

DAC, GPO

BQC08HIV

Schmitt trigger, 8mA Output / Sink Current, 5V Tolerance, Input / Output / Pull ESB_DAT

Up Enable

BQC04HIVPECI Mixed Mode IO, PECI enable, with GPIO

PECI, GPIO

GPIO: Schmitt trigger, 4mA Output / Sink Current,

PECI: 0.9V~1.2V

* 5V Tolerance, only if pull-high disable and output disable.

** Please note, the total current in each side on VCC or VSS of chip can not exceed over 48mA.

2.7.2 I/O Buffer Characteristic Table

Analog

Pull-High

5V

Current

Cell

Output Input

Application

Signal Enable(40k) Tolerance

(mA)

BQCZ16HIV

ˇ

ˇ

ˇ

ˇ

8~16

GPIO

BQC04HIV

ˇ

ˇ

ˇ

ˇ

2~4

GPIO

BQCW16HIV

ˇ

ˇ

ˇ

ˇ

8~16

ESB_CLK/

SPI_CLK

BCC16HI

ˇ

ˇ

ˇ

8~16

LPC I/F

BQC04HI

ˇ

ˇ

ˇ

2~4

GPIO

IQTHI

ˇ

ˇ

ADC, GPI

OCT04H

ˇ

ˇ

2~4

DAC, GPO

BQC08HIV

ˇ

ˇ

ˇ

ˇ

4~8

ESB_DAT

BQC04HIVPECI ˇ

ˇ

ˇ

ˇ

2~4

PECI, GPIO

Application Notice: The Pads with I/O cells of IQTHI, OCT04H should be designed carefully.

Under specific environment when: KBC is power-off, external application circuit is power-on.

Signals must not be connected with pads of IQTHI/OCT04H (ADCs/DACs). It would cause

unexpected voltage level on these pad if KBC is still power-off.

Copyright©2010, ENE Technology Inc.

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