Pi 2 Design CM4AES Hardware Reference Manual – P0.1
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4
ON-BOARD DEVICES
4.1
OVERVIEW
The CM4AES interfaces to the CM4 via a pair of high density Hirose Connectors. This
section describes in detail the devices located on the CM4AES.
4.2
COMPUTE MODULE 4
At the core of the CM4AES is the latest Raspberry Pi Compute Module 4. Designed for
low-power embedded applications, this module runs the software required to perform
the Digital Audio Player function as well as other applications. Key features of the CM4
(as used on the CM4AES) are as follows:
•
Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz
•
H.265 (HEVC) (4Kp60 decode), H.264 (1080p60 decode, 1080p30 encode)
•
OpenGL ES 3.0 graphics
•
4GB or 8GB LPDDR4-3200 SDRAM
•
2.4 GHz, 5.0 GHz IEEE 802.11 b/g/n/ac wireless
•
Bluetooth 5.0, BLE
•
Gigabit Ethernet PHY supporting IEEE 1588
•
PCIe 1-lane Host, Gen 2 (5Gbps)
•
USB 2.0 port
•
UART, I2C and I2S Peripheral Ports
•
Dual HDMI 2.0 ports (up to 4Kp60 supported)
•
4-lane MIPI DSI display port
•
SDIO 2.0
4.3
USB2504A USB HUB
The CM4AES uses the Microchip USB2504A to interface the CM4 with an external dual
USB2.0 Connector and an internal, vertical USB2.0 Connector. The signals of the
USB2504A and their use are described in the following table.
Signal
Connection
Description
USBD_N/P 0
CM4 USB_OTG
Upstream Host port from CM4
USBD_N/P 1
Unused
USBD_N/P 2
P14
Internal Vertical USB Host Connector
USBD_N/P 3
P7 PORT A
Dual USB Host Connector, Lower Port
USBD_N/P 4
P7 PORT B
Dual USB Host Connector, Upper Port
Table 2 – USB2504A USB Hub Connections
