DMA2286 datasheet(19/48 Pages) MICRONAS

19 / 48 page

DMA 2275, DMA 2286

8.4. DRAM Memory Map

8.4.1. Mode Register

Name

Address

Function

mode_register

0000

6*8 bit

access_mode

0000

8 bit

bit 0: video cond. access

(0 = free / 1 = conditional)

bit 1: data1 cond. access

(0 = free / 1 = conditional)

bit 2: data2 cond. access

(0 = free / 1 = conditional)

bit 3: data3 cond. access

(0 = free / 1 = conditional)

bit 4: data4 cond. access

(0 = free / 1 = conditional)

bit 5: not used

bit 6: not used

bit 7: not used

video_mode

0008

8 bit

bit 0: peaking select

(0 = low / 1 = high)

bit 1: peaking

(1 = on)

bit 2: baseband filter

(1 = on)

bit 3: interpol. filter

(1 = on)

bit 4: load coeff

(1 = now)

bit 5: black out

(1 = on)

bit 6: gray decoder

(1 = on)

bit 7: line delay

(1 = off)

scram_mode

0010

8 bit

bit 0: video descrambling

(0 = on)

bit 1: video rotation

(0 = double / 1 = single)

bit 2: aspect ratio

(0 = 4:3 / 1 = 16:9)

bit 3: vbi descrambling

(1 = on)

bit 4: coeff clock

(1 = on)

bit 5: not used

bit 6: not used

bit 7: user panning

(1 = on)

mac_mode

0018

8 bit

bit 3–0:

clamp position

bit 4:

clamp bypass

(1 = on)

bit 5:

freq select

(0 = 50 Hz / 1 = 60 Hz)

bit 6:

decoder sync

(1 = locked)

bit 7:

mac select

(0 = d2 / 1 = d)

pan_vector

0020

8 bit

bit 7–0:

user pan vector

(2’s complement)

pan_output

0028

8 bit

bit 7–0:

pan vector output

(2’s complement)

Edition: June 12, 1992

6251–330–1E

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