MFC2000 datasheet(151/426 Pages) ETC

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Hardware Description

MFC 2000 Multifunctional Peripheral Controller 2000

100723A

Conexant

7-3

7.1.1

Function Description

Features for scanner controller:

•

supports wide variety of CIS and linear CCD scanners (color or monochrome)

•

supports up to 8192 (= 2

13) pixels/line

•

programmable pulse width modulation for light control (up to 3 LEDs)

•

programmable clamping signal (mode, delay, width, length)

•

programmable sampling location (mode, location)

•

supports external 12-bit ADC with programmable latency and programmable data transfer position

MFC2000

Pin function

Alias

sc_led0

LEDCtrl[0]

scctrl[0]

sc_st0

start[0]

scctrl[1]

sc_led0st1

LEDCtrl[1]/start[1]

scctrl[2]

sc_led2st2

LEDCtrl[2]/start[2]

scctrl[3]

sc_clk12a

clk1/clk2a

scctrl[4]

sc_clk12b

clk1/clk2b

scctrl[5]

sc_clk12c

clk1/clk2c

scctrl[6]

A brief description of signal functionality:

start

Sensor control signal which is only active at the beginning of a scan cycle in order to initiate the transfer of

sensor data

clk1

Sensor control signal which toggles at pixel boundary; thus the frequency of this signal is half of pixel frequency

clk2

Sensor control signal whose rising and falling edges are programmable within a pixel period; thus the

frequency of this signal is the same as the pixel frequency

LEDCtrl

Light control signal which can either be the envelope or the modulation signal.

The rising and falling edge of the envelope and the duty cycle of the modulation are programmable.

7.1.2

Name/Address

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

Default

Scan Control

(ScanCtrl)

$01FF8541

(Not Used)

LEDCtrl[2]

enable

LEDCtrl[1]

enable

LEDCtrl[0]

enable

start[2]

enable

start[1]

enable

start[0]

enable

Rst. Value

xx000000b

Read Value

00h

Name/Address

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Default

Scan Control

(ScanCtrl)

$01FF8540

(Not Used)

Scan Once

Rst. Value

xxxxxxx0b

Read Value

00h

Bit 13-11 LEDCtrl[2:0] enable

This bit will be synchronized with “cycle_start”, and it is not auto

cleared.

Bit 10-8

start[2:0] enable

This bit will be synchronized with “cycle_start”, and it is not auto

cleared.

Bit 0

ScanOnce

Writing 1 to this bit will initiate an image line scanning operation.

This bit will be cleared automatically once the operation has been

completed.

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