Xilinx HDMI 1.4 Product Manual page 32

Table 2‐8: HDCP 1.4 Key Input Interface (Cont'd)
Name
hdcp14_key_aclk
hdcp14_key_aresetn
hdcp14_start_key_transmit
hdcp14_reg_key_sel
For the HDCP 1.4 transmitter, an HDCP Key Management module is needed, which is able to
send keys over the AXI4-Stream interface to the HDCP 1.4 controller.
example of how the HDMI TX 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 TX Subsystem. For HDCP 1.4 design details, see the HDCP
v1.4 Product Guide (PG224)
X-Ref Target - Figure 2-19
HDMI TX
Figure 2‐19: HDCP 1.4 Key Management Bus (AXI4-Stream)
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)
HDCP 2.2 Interrupt Outputs
Table 2-9 shows the signals for HDCP 2.2 interrupt output ports.
Table 2‐9: HDCP 2.2 Interrupt Output Interface
Name
hdcp22_irq
hdcp22_timer_irq
HDMI 1.4/2.0 TX Subsystem
PG235 October 4, 2017
Direction
Output
Output
Output
Output
[Ref 26].
HDMI TX Subsystem
HDCP 1.4
Key Management Bus
Controller
[Ref 25].
Direction
Output
Output
www.xilinx.com
Chapter 2: Product Specification
Width
1 AXI4-Stream clock
1 Reset (Active-Low)
1 Start key transmit
3 Key select
HDCP Key
(AXI4-Stream)
Management
Width
1 HDCP 2.2 interrupt
1 HDCP 2.2 timer interrupt
Description
Figure 2-19 shows an
• • • • • • •• • • • • • •
Description
Send Feedback
32