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Z85230中文资料(zilog)中文数据手册「EasyDatasheet - 矽搜」

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SCC?/ESCC? U SER’S M ANUAL

T干练C ONTENTS 第1章概述

1.1简介....................................................................................................................................

1.2 SCC能力.........................................................................................................................

1.3框图...............................................................................................................................

1.4引脚说明.............................................................................................................................

1.4.1引脚常见两种Z85X30和Z80X30 ........................................... .........................

1.4.2引脚描述,（Z85X30只）........................................... ...........................................

1.4.3引脚描述,（Z80X30只）........................................... ...........................................1-1 1-2 1-4 1-5 1-7 1-8 1-9

第2章接口SCC / ESCC

2.1简介.................................................................................................................................... 2-1

2.2 Z80X30接口时序................................................................................................................ 2-1

2.2.1Z80X30读周期时序.............................................. ............................................... 2-2

2.2.2Z80X30写周期时序.............................................. ................................................ 2- 3

2.2.3Z80X30中断确认周期时序............................................. ..................... 2-4

2.2.4Z80X30寄存器访问............................................... .................................................. 2-5

2.2.5Z80C30注册增强............................................... ........................................ 2-8

2.2.6Z80230注册增强............................................... ....................................... 2-8

2.2.7Z80X30复位.................................................................................................................. 2-9

2.3 Z85X30接口时序............................................................................................................. 2-10

2.3.1Z85X30读周期时序.............................................. ............................................. 2-10

2.3.2Z85X30写周期时序.............................................. .............................................. 2-11

2.3.3Z85X30中断确认周期时序............................................. ................... 2-11

2.3.4Z85X30寄存器访问............................................... ................................................. 2 -12

2.3.5Z85C30注册增强............................................... ...................................... 2-14

2.3.6Z85C30 / Z85230注册增强............................................. ......................... 2-14

2.3.7Z85X30复位................................................................................................................ 2-15

2.4接口编程................................................................................................................ 2-15

2.4.1I / O编程简介............................................. ........................................... 2-15

2.4.2轮询............................................................................................................................ 2-16

2.4.3中断........................................................................................................................ 2-16

2.4.4中断控制............................................................................................................. 2-17

2.4.5菊花链解决方案.............................................. .................................................. .. 2-19

2.4.6中断应答................................................ .................................................. 2-21

2.4.7为接收中断............................................... .................................................. .. 2-21

2.4.8发送中断和发送缓冲区空位........................................... ............. 2-25

2.4.9外部/状态中断.............................................. ................................................. 2 -31

2.5块/ DMA传输..................................................................................................................... 2-33

2.5.1数据块传输.............................................................................................................. 2-33

2.5.2DMA请求............................................................................................................... 2-36

2.6测试功能............................................................................................................................. 2-41

2.6.1本地回环.............................................................................................................. 2-41

2.6.2自动回声....................................................................................................................... 2-41 UM010901-0601i

SCC / ESCC用户手册

第3章SCC /食管癌辅助支持电路

3.1简介.................................................................................................................................... 3-1

3.2波特率发生器..................................................................................................................... 3-1

3.3数据编码/解码............................................................................................................... 3-4

3.4 DPLL数字锁相环........................................... .................................................. ..... 3-7

3.4.1DPLL操作在NRZI模式............................................ ...................................... 3-8

3.4.2DPLL工作在FM模式............................................ ........................................ 3-9

3.4.3DPLL操作在曼彻斯特模式............................................ .......................... 3-10

3.4.4发送时钟计数器（ESCC只）........................................... .................................. 3-10

3.5时钟选择........................................................................................................................... 3-11

3.6晶体振荡器......................................................................................................................... 3-14

第4章数据通信模式

4.1简介.................................................................................................................................... 4-1

4.1.1发送数据路径说明.............................................. ......................................... 4-1

4.1.2接收数据路径说明.............................................. ......................................... 4-2

4.2异步模式...................................................................................................................... 4-3

4.2.1异步传输................................................ .................................................. 4-4

4.2.2异步接收................................................ .................................................. .. 4-6

4.2.3异步初始化................................................ ............................................... 4-7

4.3面向字节同步模式............................................ .................................................. ... 4-8

4.3.1面向字节同步传输............................................. ................................. 4-8

4.3.2面向字节同步接收............................................. ................................ 4-10

4.3.3发射器/接收器同步.............................................. ............................. 4-17

4.4面向比特同步（SDLC / HDLC）模式....................................... ................................... 4-18

4.4.1SDLC发送............................................................................................................... 4-19

4.4.2SDLC接收................................................................................................................ 4-22

4.4.3SDLC帧状态FIFO .............................................. ................................................ 4- 27

4.4.4SDLC循环模式........................................................................................................... 4-30第5章寄存器说明

5.1简介.................................................................................................................................... 5-1

5.2写寄存器.............................................................................................................................. 5-2

5.2.1写寄存器0（命令寄存器）........................................... .................................. 5-2

5.2.2写寄存器1（发送/接收中断和数据传输模式定义）.......... 5-4

5.2.3写寄存器2（中断向量）........................................... ........................................ 5-7

5.2.4写寄存器3（接收参数和控制）......................................... ............... 5-7

5.2.5写寄存器4（发送/接收杂项参数和模式）.................. 5-8

5.2.6写寄存器5（发送参数和控制）......................................... ............ 5-9

5.2.7写寄存器6（同步字符或SDLC地址域）....................................... ... 5-10

5.2.8写寄存器7（同步字符或SDLC标志）........................................ ................... 5-11

5.2.9写寄存器7总理（ESCC只）.......................................... .................................... 5-12

5.2.10写入寄存器7总理（85C30只）....................................... ....................................... 5-13

5.2.11写入寄存器8（发送缓冲器）........................................ .......................................... 5-13

5.2.12写入寄存器9（主中断控制）....................................... ............................. 5-14

5.2.13写入寄存器10（其他发射器/接收器控制位）........................... 5-15

5.2.14写入寄存器11（时钟模式控制）....................................... .................................. 5-17

5.2.15写入寄存器12（波特率发生器时间常数低字节）....................... 5-18

5.2.16写入寄存器13（波特率发生器时间常数高字节）....................... 5-19

5.2.17写入寄存器14（其他控制位）....................................... ....................... 5-19

5.2.18写入寄存器15（外部/状态中断控制）............. ................ 5-20

5.3读寄存器............................................................................................................................ 5-21

5.3.1读寄存器0（发送/接收缓冲器状态和外部状态）........................ 5-21

5.3.2读寄存器1 ............................................................................................................. 5-23

5.3.3读寄存器2 ............................................................................................................. 5-24

5.3.4读寄存器3 ............................................................................................................. 5-25

5.3.5读寄存器4（ESCC和85C30只）......................................... ............................ 5-25

5.3.6读寄存器5（ESCC和85C30只）......................................... ............................ 5-25

UM010901-0601ii

SCC / ESCC用户手册

5.3.7 5.3.8 5.3.9 5.3.10 5.3.11 5.3.12 5.3.13 5.3.14 5.3.15 5.3.16读寄存器6（而不是在NMOS）.......................................... .........................................

读寄存器7（而不是在NMOS）.......................................... .........................................

读寄存器8 .............................................................................................................

读寄存器9（ESCC和85C30只）......................................... ............................

读寄存器10 ...........................................................................................................

读寄存器11（ESCC和85C30只）......................................... ..........................

读寄存器12 ...........................................................................................................

读寄存器13 ...........................................................................................................

读寄存器14（ESCC和85C30只）......................................... ..........................

读寄存器15 ...........................................................................................................

5-25

5-26

5-27

第6章应用笔记

接口Z80?处理器Z8500外围家庭............................................ ............................. 6-1

该Z180接口与SCC在MHZ .......................................... .............................................. 6-34

该Zilog数据通信系列80186 CPU .......................................... ........................................ 6-59

SCC在二进制同步通信............................................. ......................................... 6-79

串行通信控制器（SCC?）：操作SDLC模式............................................ ...... 6-93

在SDLC Protocol6-105使用SCC与Z8000

提高你系统性能使用ZilogESCC?................................................................ 6-117

技术考虑在实施LocalTalk连接访问协议................................ 6-131

片上振荡器Design................................................................................................................... 6-151

第7章问题和解答

Zilog公司SCC Z8030 / Z8530问题和解答.......................................... ......................................... 7-1

Zilog公司ESCC?控制器问题和解答.............................................. ................................... 7-11

UM010901-0601iii