M37281EKSP Datasheet, PDF (169/172 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

M37281MAH–XXXSP,M37281MFH–XXXSP,M37281MKH–XXXSP, M37281EKSP
Address 025816
SPRITE OSD Control Register
b7 b6 b5 b4 b3 b2 b1 b0
SPRITE OSD control register (SC) [Address 025816]
B
Name
0 SPRITE OSD
control bit
(SC0)
0: Stopped
1: Operating
Functions
1 Pre-divide ratio
selection bit
(SC1)
2, 3 Dot size selection
bits
(SC2, SC3)
4 Interrupt occurrence
position selection bit
(SC4)
0: Pre-divide ratio 1
1: Pre-divide ratio 2
b3 b2
0 0: 1Tc ✕ 1/2H
0 1: 1Tc ✕ 1H
1 0: 2Tc ✕ 1H
1 1: 2Tc ✕ 2H
0: After display of horizontal 20 dots
1: After display of horizontal 10 dots or 20 dots
5 XIN/4096 • SPRITE
interrupt source
switch bit (SC5)
0: XIN/4096 interrupt
1: SPRITE OSD interrupt
6, 7 Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0”.
After reset R W
0 RW
0 RW
0 RW
0 RW
0 RW
0 R—
Notes 1: Tc : Pre-devided clock period for OSD
2: H : HSYNC
Rev.1.01 2003.07.16 page 169 of 170