i
scc™/escc™ u
SER
’
S
M
ANUAL
chapter 1. 一般 描述
1.1介绍 ....................................................................................................................................1-1
1.2scc’s 能力......................................................................................................................... 1-2
1.3块 图解............................................................................................................................... 1-4
1.4管脚 描述............................................................................................................................. 1-5
1.4.1管脚 一般 至 两个都 z85x30 和 z80x30.................................................................... 1-7
1.4.2管脚 描述, (z85x30 仅有的)...................................................................................... 1-8
1.4.3管脚 描述, (z80x30 仅有的)...................................................................................... 1-9
chapter 2. 接合 这 scc/escc
2.1介绍 ....................................................................................................................................2-1
2.2z80x30 接口 定时 ................................................................................................................ 2-1
2.2.1z80x30 读 循环 定时............................................................................................. 2-2
2.2.2z80x30 写 循环 定时 .............................................................................................. 2-3
2.2.3z80x30 中断 acknowledge 循环 定时.................................................................. 2-4
2.2.4z80x30 寄存器 进入.................................................................................................. 2-5
2.2.5z80c30 寄存器 增强....................................................................................... 2-8
2.2.6z80230 寄存器 增强...................................................................................... 2-8
2.2.7z80x30 重置.................................................................................................................. 2-9
2.3z85x30 接口 定时............................................................................................................. 2-10
2.3.1z85x30 读 循环 定时........................................................................................... 2-10
2.3.2z85x30 写 循环 定时 ............................................................................................ 2-11
2.3.3z85x30 中断 acknowledge 循环 定时................................................................ 2-11
2.3.4z85x30 寄存器 进入................................................................................................ 2-12
2.3.5z85c30 寄存器 增强..................................................................................... 2-14
2.3.6z85c30/z85230 寄存器 增强...................................................................... 2-14
2.3.7z85x30 重置................................................................................................................ 2-15
2.4接口 程序编制................................................................................................................ 2-15
2.4.1i/o 程序编制 介绍........................................................................................ 2-15
2.4.2polling ............................................................................................................................2-16
2.4.3中断 ........................................................................................................................2-16
2.4.4中断 控制............................................................................................................. 2-17
2.4.5daisy-chain 决议.................................................................................................. 2-19
2.4.6中断 acknowledge................................................................................................... 2-21
2.4.7这 接受者 中断................................................................................................... 2-21
2.4.8transmit 中断 和 transmit 缓存区 empty 位........................................................ 2-25
2.4.9外部/状态 中断............................................................................................... 2-31
2.5块/dma 转移..................................................................................................................... 2-33
2.5.1块 transfers.............................................................................................................. 2-33
2.5.2dma requests............................................................................................................... 2-36
2.6测试 功能............................................................................................................................. 2-41
2.6.1local loopback.............................................................................................................. 2-41
2.6.2自动 echo....................................................................................................................... 2-41
T
能
的
C
ONTENTS
um010901-0601
: 点此下载
