W83977TF

5.3.5 CFIFO （并口数据FIFO ）， MODE = 010 ..................................... ...................... 58

5.3.6 ECPDFIFO （ ECP数据FIFO ）， MODE = 011 ...................................... ...................................... 58

5.3.7 TFIFO （ TEST FIFO模式）， MODE = 110 ...................................... ........................................... 58

5.3.8 CNFGA （配置寄存器）， MODE = 111 ...................................... .............. 58

5.3.9 CNFGB （配置寄存器B） MODE = 111 ...................................... ............... 58

5.3.10 ECR （扩展控制寄存器）， MODE = ALL ...................................... .............. 59

作者： ECP端口寄存器5.3.11位图......................................... .............................................. 60

5.3.12 ECP引脚说明............................................................................................................61

5.3.13 ECP OPERATION..........................................................................................................................62

5.3.14 FIFO操作........................................................................................................................62

5.3.15 DMA TRANSFERS........................................................................................................................63

5.3.16可编程I / O（ NON - DMA）模式..................................... ........................................... 63

5.4

5.5

延长FDD模式(EXTFDD)...................................................................................................63

延长2FDD MODE （ EXT2FDD ） ............................................ .................................................. 63

6.键盘控制器.............................................. ............................................... 64

6.1

6.2

6.3

6.4

6.5

输出缓冲器....................................................................................................................................64

输入缓冲器.........................................................................................................................................64

状态寄存器.................................................................................................................................65

COMMANDS .............................................................................................................................................65

硬件GATEA20 /键盘复位控制逻辑........................................... ...... 67

6.5.1 KB控制寄存器（逻辑器件5 ， CR- F0 ） ................................... ...................... 67

6.5.2端口92控制寄存器（默认值= 0X24 ） ..................................... ....... 67

6.4

OnNow的/安全键盘和鼠标唤醒......................................... ............. 68

7.通用I/O....................................................................................................69

7.1

7.2

基本I / O FUNCTIONS...........................................................................................................................71

备用I / O功能..............................................................................................................73

7.2.1中断STEERING..............................................................................................................73

7.2.2看门狗定时器输出........................................... .................................................. .... 74

7.2.3电源LED...................................................................................................................................74

7.2.4通用地址译码器........................................... ............................... 74

7.2.5通用写选通........................................... ......................................... 74

8.即插即用配置............................................ ................................ 75

8.1

兼容PNP...................................................................................................................................75

8.1.1扩展功能寄存器............................................ .......................................... 75

- III -

出版日期： 1998年3月

修订版0.62