赛灵思的HDMI Receiver Subsystem 用户手册pg236翻译和学习(7)

读赛灵思IP手册，HDMI 1.4/2.0 Receiver Subsystem v2.0 Product Guide，即HDMI接受器系统的手册。本期介绍此IP的HDCP 输入接口、热插拔、时钟和复位。

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HDCP 1.4 Key Input Interface (AXI4-Stream Slave Interface)

Table 2-8 shows the signals for HDCP 1.4 key interface. This interface runs at the hdcp14_key_aclk.

HDCP 1.4键输入接口（AXI4流从接口）

表2-8显示了HDCP 1.4键接口的信号。此接口在hdcp14_key_aclk上运行。

Table 2‐8: HDCP 1.4 Key Input Interface

For the HDCP 1.4 receiver, an HDCP Key Management module is needed, which is able to send keys over the AXI4-Stream interface to the HDCP 1.4 controller. Figure 2-15 shows an example of how the HDMI RX Subsystem is connected to the HDCP Key Management module through a Key Management Bus (AXI4-Stream). The HDCP Key Management module is not part of the HDMI RX Subsystem. For HDCP 1.4 design details, see the HDCP v1.4 Product Guide (PG224) [Ref 24]

对于HDCP 1.4接收机，需要一个HDCP密钥管理模块，该模块能够通过AXI4 Stream接口将密钥发送到HDCP 1.4控制器。图2-15显示了HDMI RX子系统如何通过密钥管理总线（AXI4流）连接到HDCP密钥管理模块的示例。HDCP密钥管理模块不是HDMI RX子系统的一部分。有关HDCP 1.4设计的详细信息，请参阅HDCP 1.4版产品指南（PG224）[参考文献24]

However, the HDCP 2.2 key is handled slightly differently as it is solely controlled by the software application. The user application is responsible for providing the infrastructure to securely store and retrieve the keys to be loaded into the HDCP 2.2 drivers. For the detailed list of keys that are required to be loaded by the user application, see the HDCP v2.2 Product Guide (PG249) [Ref 23].

然而，HDCP 2.2键的处理方式略有不同，因为它完全由软件应用程序控制。用户应用程序负责提供基础设施，以安全地存储和检索要加载到HDCP 2.2驱动程序中的密钥。有关用户应用程序需要加载的密钥的详细列表，请参阅HDCP v2.2产品指南（PG249）[参考文献23]。

HDCP 2.2 Interrupt Outputs

Table 2-9 shows the signals for HDCP 2.2 interrupt output ports.

HDCP 2.2中断输出

表2-9显示了HDCP 2.2中断输出端口的信号。

Table 2‐9: HDCP 2.2 Interrupt Output Interface

Miscellaneous Signals with AXI4-Stream Video Interface

Table 2-10 shows the miscellaneous signals with AXI4-Stream video interface selected.

AXI4流视频接口的其他信号

表2-10显示了选择AXI4流视频接口的其他信号。

Table 2‐10: Miscellaneous Signals with AXI4-Stream Video Interface

1. The Hot Plug Detect (HPD) signal is driven by an HDMI sink and asserted when the HDMI cable is connected to notify the HDMI source of the presence of an HDMI sink. When designing a HDMI sink system using HDMI Receiver Subsystem, in the PCB, if you choose to use a voltage level shifter, the HPD polarity remains as Active High.

However, if you choose to add an inverter to the HPD signal, then the HPD polarity must be set to Active Low in HDMI Receiver Subsystem GUI. There are two common ways of using HPD: Toggle HPD to trigger HDCP authentication process (usually 100 ~ 500ms). Or a longer HPD toggle (>1s), the HDMI sink is notifying the source its present without cable unplug and plug. The software API used to assert and release HPD is XV_HdmiRxSs_SetHpd.

2. The Cable Detect signal is connected to a 5V power signal from the HDMI cable connector via some level shifter to notify the HDMI RX Subsystem that a HDMI source is connected.

1.热插拔检测（HPD）信号由HDMI接收器驱动，并在连接HDMI电缆以通知HDMI源存在HDMI接收器时断言。使用HDMI接收器子系统设计HDMI接收器系统时，在PCB中，如果选择使用电压电平移位器，HPD极性将保持为高电平有效。

但是，如果您选择向HPD信号添加逆变器，则必须在HDMI接收器子系统GUI中将HPD极性设置为低电平有效。有两种常用的使用HPD的方法：切换HPD以触发HDCP身份验证过程（通常为100~500ms）。或者使用更长的HPD切换（>1s），HDMI接收器将通知源其存在，而无需拔下电缆和插头。用于断言和发布HPD的软件API是XV_AdmiRxSs_SetHpd。

2.电缆检测信号通过一些电平移位器连接到来自HDMI电缆连接器的5V电源信号，以通知HDMI RX子系统已连接HDMI源。

Miscellaneous Signals with Native Video Interface

Table 2-11 shows the miscellaneous signals with native video interface selected.

Table 2‐11: Miscellaneous Signals with Native Video Interface

1. The Hot Plug Detect (HPD) signal is driven by an HDMI sink and asserted when the HDMI cable is connected to notify the HDMI source of the presence of an HDMI sink. In most cases, the HDMI sink is simply connected to 5V power signal. Therefore, in the PCB, if you choose to use a voltage divider or level shifter, the HPD polarity remains as Active High. However, if you add an inverter to the HPD signal, then the HPD polarity must be set to Active Low in HDMI Transmitter Subsystem GUI. When designing a HDMI sink system using HDMI Receiver Subsystem, in the PCB, if you choose to use a voltage level shifter, the HPD polarity remains as Active High. However, if you choose to add an inverter to the HPD signal, then the HPD polarity must be set to Active Low in HDMI Receiver Subsystem GUI. There are two common ways of using HPD: Toggle HPD to trigger HDCP authentication process (usually 100 ~ 500ms). Or a longer HPD toggle (>1s), the HDMI sink is notifying the source its present without cable unplug and plug. The software API used to assert and release HPD is XV_HdmiRxSs_SetHpd.

2. The Cable Detect signal is connected to a 5V power signal from the HDMI cable connector via some level shifter to notify the HDMI RX Subsystem that a HDMI source is connected.

1.热插拔检测（HPD）信号由HDMI接收器驱动，并在连接HDMI电缆以通知HDMI源存在HDMI接收器时断言。在大多数情况下，HDMI接收器只需连接到5V电源信号。因此，在PCB中，如果选择使用分压器或电平移位器，HPD极性将保持为高电平有效。但是，如果您向HPD信号添加逆变器，则必须在HDMI发射机子系统GUI中将HPD极性设置为低电平有效。使用HDMI接收器子系统设计HDMI接收器系统时，在PCB中，如果选择使用电压电平移位器，HPD极性将保持为高电平有效。但是，如果您选择向HPD信号添加逆变器，则必须在HDMI接收器子系统GUI中将HPD极性设置为低电平有效。有两种常用的使用HPD的方法：切换HPD以触发HDCP身份验证过程（通常为100~500ms）。或者使用更长的HPD切换（>1s），HDMI接收器将通知源其存在，而无需拔下电缆和插头。用于断言和发布HPD的软件API是XV_AdmiRxSs_SetHpd。

2.电缆检测信号通过一些电平移位器连接到来自HDMI电缆连接器的5V电源信号，以通知HDMI RX子系统已连接HDMI源。

P30 clock and reset

Clocks and Resets

Table 2-12 provides an overview of the clocks and resets. See Clocking and Resets in Chapter 3 for more information.

时钟和复位

表2-12概述了时钟和复位。有关更多信息，请参阅第3章中的时钟和复位。

Table 2‐12: Clocks and Resets