M66335FP datasheet(13/59 Pages) RENESAS

13 / 59 page

M66335FP

REJ03F0276-0200 Rev.2.00 Jun 16, 2008

Page 13 of 58

ACCK

<SRDYB>

(SSCAN)

INT

DRQ

DAKB

RDB

(Counter reset)

(DMAFIN)

PTIMB

1. SRDYB: L is taken in with a

↑ flow of SH, when scanning is started and PTIMB is output. (SSCAN: H)

2. SRDYB: H is taken in with a

↑ flow of ACCK, when the reading of one line ends. (SSCAN: L)

3. The internal counter reset signal is generated with a

↓ flow of SSCAN, and DRQ is asserted with a ↑ flow of SSCAN.

4. After the internal counter is reset, DMA transfer is started. (The internal counter is counted up by one each time a

pixel is transferred.)

5. When the value of the internal counter reaches the output pixel number, DMAFIN shifts to H, and DRQ is negated

with a

↑ flow form DMAFIN and INT is asserted with a ↓ flow of DMAFIN.

6. When CPU is ready for reading the next line, INTCLR is generated and INT is negated, and then SRDYB is set L.

: Output section

<SRDYB>, <INTCLR> : Register setting

(SSCAN), (DMAFIN), (counter reset) : Internal signal

Figure 3 DMA Interface Operations and the Reading Sequence (Multivated Data Output)

Table 2 Gate Signal Ranges for the Sensor Widths

Sensor Width

Gate Signal

Resolution

200 dpi

2103/55

1943/215

Uniformity correction range (UNIFG)

400 dpi

4207/111

3887/431

200 dpi

2103/55

1943/215

AGC mode

400 dpi

4207/111

3887/431

200 dpi

2018/130

1584/564

AGC range (AGCG)

SCAN mode

400 dpi

4037/261

3169/1129

Table 3 Original Sheet Reading Widths According to the Original Sheet Widths for the Sensor Widths

Sensor Width

Original Sheet Width

Resolution

200 dpi

2102/54

400 dpi

4206/110

—

200 dpi

2102/54

1942/214

400 dpi

4206/110

3886/430

When original sheets narrower than the sensor width, cut out the original sheet width with the registers 11 to 14.

(OFFSET, OUTLENGTH): (Region designation function)

X/Y

X: Left end address

Y: Right end address

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