c8051f020/1/2/3
rev. 1.4 5
16.1.accessing xram..........................................................................................................145
16.1.1. 16-位 movx example.......................................................................................145
16.1.2. 8-位 movx example.........................................................................................145
16.2.configuring 这 外部 记忆 接口 .................................................................146
16.3.端口 选择 和配置 ..................................................................................146
16.4.多路复用 和 非-多路复用 选择.................................................................148
16.4.1. 多路复用 configuration ..................................................................................148
16.4.2. 非-多路复用 配置...........................................................................149
16.5.记忆 模式 selection ...............................................................................................150
16.5.1. 内部的 xram仅有的 ...........................................................................................150
16.5.2. 分割 模式 没有 bank 选择 ..........................................................................150
16.5.3. 分割 模式 和 bank 选择 ...............................................................................151
16.5.4. 外部 在ly.......................................................................................................151
16.6.定时 .......................................................................................................................151
16.6.1. 非-multiplexed 模式........................................................................................153
16.6.1.1.16-位 movx: emi0cf[4:2] = ‘101’, ‘110’, 或者 ‘111’................................153
16.6.1.2.8-位 movx 没有 bank 选择: emi0cf[4:2] = ‘101’ 或者 ‘111’............154
16.6.1.3.8-位 movx 和 bank select: emi0cf[4:2] = ‘110’...............................155
16.6.2. 多路复用 模式................................................................................................156
16.6.2.1.16-位 movx: emi0cf[4:2] = ‘001’, ‘010’, 或者 ‘011’................................156
16.6.2.2.8-位 movx 没有 bank 选择: emi0cf[4:2] = ‘001’ 或者 ‘011’............157
16.6.2.3.8-位 movx 和 bank select: emi0cf[4:2] = ‘010’...............................158
17. 端口 输入/ouTPUT .....................................................................................................161
17.1.端口 0 通过 3 和 这 priority crossbar 解码器....................................................163
17.1.1. crossbar 管脚 分派 和 allocation ............................................................163
17.1.2. configuring 这 输出 模式s 的 这 端口 管脚 ..................................................164
17.1.3. configuring 端口 管脚作 数字的 输入...............................................................165
17.1.4. 外部 中断(ie6 和 ie7) ........................................................................165
17.1.5. 弱 拉-ups......................................................................................................165
17.1.6. configuring 端口 1 管脚 作 相似物 输入 (ain1.[7:0])......................................165
17.1.7. 外部 记忆 interface 管脚 assignments......................................................166
17.1.8. crossbar 管脚 assignment 例子......................................................................168
17.2.端口 4 通过 7 (c8051f020/2 仅有的)..........................................................................177
17.2.1. configuring 端口 这个是 不 pinned 输出.......................................................177
17.2.2. configuring 这 输出 模式s 的 这 端口 管脚 ..................................................177
17.2.3. configuring 端口 管脚作 数字的 输入...............................................................178
17.2.4. 弱 拉-ups......................................................................................................178
17.2.5. 外部 记忆接口..................................................................................178
18. 系统 management 总线 / i2c 总线 (smbus0) .................................................183
18.1.支承的 documents ..................................................................................................184
18.2.smbus 协议.............................................................................................................185
18.2.1. Arbitration............................................................................................................185
18.2.2. 时钟 低 extension...........................................................................................185
18.2.3. scl 低 timeout ...............................................................................................186
18.2.4. scl 高 (smbus free) timeout.......................................................................186
: 点此下载
