MFC2000 datasheet(164/426 Pages) ETC

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MFC2000 Multifunctional Peripheral Controller 2000

Hardware Description

7-16

Conexant

100723A

In order to apply the content of this register to the analog die, the content must be sent serially by writing to the

‘ADCSerialCmd’ register. Please refer to the ‘ADCSerialCmd’ register description for more information.

Bit 15

ADC enable

This bit is used to enable the internal adc. The ADC circuit by default

is disabled.

Bit 12-8

OffsetSel[4:0]

An analog subtracter is used in conjunction with OffsetSel in order to

remove the DC offset from scanner signal.

Bit 5

GPO on EV_VD[5]

When ‘VSC on EV bus’ bit, i.e., bit 2 of VSCCtrl register, is set, then

EV_VD[7:0] bus will function as output.. EV_VD[5] output is connected

to this bit to function as general purpose output (GPO).

Bit 4

GPO on EV_VD[4]

When ‘VSC on EV bus’ bit, i.e., bit 2 of VSCCtrl register, is set, then

EV_VD[7:0] bus will function as output.. EV_VD[4] output is connected

to this bit to function as general purpose output (GPO).

Bit 3-0

GainSel[3:0]

GainSel is connected to a programmable gain amplifier to adjust the

gain of the scanner signal.

Note: This register is double-buffered. The value written into this register will not be applied to

SIA immediately. Rather, the value will be applied after the start of scancycle. Reading this

Name/Address

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Default

ADCSerialCmd

(ADCSerialCmd)

$01FF854F

Send

Status

(read

only)

(Not Used)

(Not Used) Rst. Value

xxh

Read Value

00h

Name/Address

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Default

ADCSerialCmd

(ADCSerialCmd)

$01FF854E

(Not Used)

(reserved)

‘0’

Command

Type

Transmit

Mode[1]

Transmit

Mode[0]

Rst. Value

xxxx0000b

Read Value

00h

Bit 15

Send Status (read only)

This bit indicates one of the following statuses:

waiting for an event to occur, as selected by ‘transmit mode[1:0]’, prior

to sending the serial command

sending serial command is in progress.

The wait for the event can be aborted by clearing ‘scanenable’ bit on

‘ScanConfig’ register, and the command will not be sent.

Bit 15

reserved

It is important to always write ‘0’ to this bit.

Bit 2

Command Type

Function

To send ‘offset’ and ‘gain’ settings as stored in ‘ScanIAConfig’ register

To send ‘ADC enable’ bit as stored in ‘ScanIAConfig’ register

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