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M37281EKSP Datasheet, PDF (143/172 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER | |||
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M37281MAHâXXXSP,M37281MFHâXXXSP,M37281MKHâXXXSP, M37281EKSP
Addresses 00D016 to 00DF16
Block Control Register i
b7 b6 b5 b4 b3 b2 b1 b0
Block control register i (BCi) (i=1 to 16) [Addresses 00D016 to 00DF16]
B
Name
0, 1 Display mode
selection bits
(BCi0, BCi1)
Functions
b1 b0
0 0: Display OFF
0 1: OSD mode
1 0: CC mode
1 1: CDOSD mode
After reset R W
Indeterminate R W
2 Border control bit 0 : Border OFF
(BCi2)
1 : Border ON
Indeterminate R W
3, 4 Dot size selection
bits
(BCi3, BCi4)
5, 6 Pre-divide ratio
selection bit
(BCi5, BCi6)
b6 b5 b4 b3 Pre-divide
ratio
Dot size
Indeterminate R W
00
0
01
01 0
â1
11
00
0
01
1
â2
10
11
1 10 0
01
1
00
10 1
â3
10
11
1Tc â 1/2H
1Tc â 1H
2Tc â 2H
3Tc â 3H
1Tc â 1/2H
1Tc â 1H
2Tc â 2H
3Tc â 3H
Indeterminate R W
1.5Tc â 1/2H (See note 3)
1.5Tc â 1H (See note 3)
1Tc â 1/2H
1Tc â 1H
2Tc â 2H
3Tc â 3H
7 Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is indeterminate.
Indeterminate R â
Notes 1: Tc is OSD clock cycle divided in pre-divide circuit.
2: H is HSYNC.
3: This character size is available only in Layer 2. At this time, set layer 1âs
pre-divide ratio = â 2, layer 1âs horizontal dot size = 1Tc.
Rev.1.01 2003.07.16 page 143 of 170
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