Z90255 ROM和OTP Z90251
32 KB电视控制器, OSD
iii
目录
1
1概述
1.1
1.2
1.3
引脚分配和说明.............................................. ...... 5
单一用途的引脚说明............................................. 7 ........
复用引脚说明............................................... ............. 8
2
存储器说明................................................ ........................ 10
2.1
2.2
2.3
标准的注册文件............................................... .................... 10
扩展寄存器文件............................................... .................. 11
程序存储器................................................ ........................... 11
3
4
看门狗定时器( WDT ) ........................................... ..................... 15
STOP和HALT模式操作............................................ .. 16
4.1
4.2
4.3
掉电暂停模式操作........................................... ..... 16
停止模式操作............................................... ...................... 17
STOP模式恢复注册.............................................. ...... 18
5
屏幕显示.............................................. ............................ 22
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
OSD位置................................................ ................................. 22
第二个颜色特征............................................... ..................... 25
网格和色调效果.............................................. ................ 28
OSD淡出................................................ ...................................... 33
行间间距.............................................. ........................... 36
字辈................................................ .................... 37
字符大小和平滑效果............................................ 39
边缘效应................................................ ................................ 40
显示属性控制............................................... ................. 40
HV中断处理............................................... .................. 49
6
7
Z90255 I2C主接口.............................................. ............ 53
输入/输出端口.............................................. ............................. 57
7.1
7.2
7.3
4端口引脚输出选择寄存器........................................... ....... 59
端口5引脚输出选择寄存器........................................... ....... 62
港口6数据寄存器.............................................. ........................ 63
8
红外接口................................................ ............................. 65
PS001301-0800