cx81801-7x/8x smartv.xx modem 数据 薄板
102199B
Conexant
v
3.1.2
串行 接口 configurati在 仅有的................................................................................................................. 3-2
3.1.2.1
串行 dte 接口 和 indicator 输出 (parif= 低)........................................................ 3-2
3.1.3
并行的 接口 配置 仅有的 (par如果 = 高)..................................................................................... 3-3
3.1.3.1
并行的 host 总线 接口 ......................................................................................................... 3-3
3.1.4
cx81801 modem interface signals................................................................................................................ 3-3
3.2
cx20493 lsd 硬件管脚 和信号 ................................................................................................................... 3-22
3.2.1
cx20493 lsd signal summary.................................................................................................................... 3-22
3.2.1.1
smart modem interface (通过dib) ................................................................................... 3-22
3.2.1.2
电话 线条Interface .......................................................................................................... 3-22
3.2.1.3
电压 references................................................................................................................... 3-22
3.2.1.4
一般 目的输入/输出.................................................................................................. 3-23
3.2.1.5
非 connects............................................................................................................................. 3-23
3.2.2
cx20493 lsd 管脚 assignments和 信号 definitions ............................................................................... 3-23
3.3
cx20442 vc 硬件 管脚 一个nd 信号 (s模式ls)................................................................................................... 3-28
3.3.1
cx20442 vc signal summary...................................................................................................................... 3-28
3.3.1.1
speakerphone 在terface............................................................................................................ 3-28
3.3.1.2
电话 handset/head设置 interface...................................................................................... 3-28
3.3.1.3
cx81801 modem 在terface....................................................................................................... 3-28
3.3.1.4
host 接口........................................................................................................................... 3-28
3.3.2
cx20442 vc 管脚 assignments和 信号 definitions ................................................................................. 3-29
3.4
电的 和 environmental 规格 ................................................................................................................. 3-35
3.4.1
运行 情况, 绝对 最大比率, 和 电源必要条件s ........................................... 3-35
3.4.2
接口 和 德州仪器ming waveforms ................................................................................................................. 3-37
3.4.2.1
外部 记忆总线 定时 ................................................................................................... 3-37
3.4.2.2
并行的 host总线 定时 .......................................................................................................... 3-39
3.4.2.3
串行 dte接口.................................................................................................................. 3-41
3.5
结晶 specifications ................................................................................................................................................... 3-42
4.
包装 维度 ............................................................................................................................4-1
5.
并行的 host接口 ..........................................................................................................................5-1
5.1
Overview......................................................................................................................................................................... 5-1
5.2
寄存器 signal 定义 ............................................................................................................................................. 5-3
5.2.1
ier - 中断 使能 register (地址 = 1,dlab = 0) .................................................................................... 5-3
5.2.2
fcr - 先进先出 控制 寄存器(地址 = 2,写 仅有的) ....................................................................................... 5-4
5.2.3
iir - 中断 identifier寄存器(地址= 2) .................................................................................................. 5-5
5.2.4
lcr - 线条 控制 register (一个ddr = 3) .......................................................................................................... 5-6
5.2.5
mcr - modem 控制 register (一个ddr = 4).................................................................................................... 5-7
5.2.6
lsr - 线条 状态 register (一个ddr = 5)............................................................................................................ 5-7
5.2.7
msr - modem 状态 register (一个ddr = 6) ..................................................................................................... 5-9
5.2.8
rbr - rx 缓存区 (接受者 缓存区寄存器) (地址= 0, dlab = 0) ................................................................ 5-9
5.2.9
thr - tx 缓存区 (传输者 支持寄存器) (地址 =0, dlab= 0).......................................................... 5-9
5.2.10
divisor 寄存器 (地址= 0 和 1,dlab = 1).............................................................................................. 5-10
5.3
接受者 先进先出 中断 运作 ................................................................................................................................ 5-10
5.3.1
接受者 数据 有 中断 ................................................................................................................. 5-10
5.3.2
接受者 charactertimeout 中断......................................................................................................... 5-11
5.4
传输者 先进先出 在terrupt 运作 ........................................................................................................................... 5-11
5.4.1
传输者 empty 中断......................................................................................................................... 5-11
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