4.1.1 SAMA5D27 System-In-Package

The SAMA5D27 System-In-Package (SiP) (ATSAMA5D27C-LD2G-CU) integrates the ARM Cortex-A5 processor-based SAMA5D2 MPU with 2 Gbit LPDDR2-SDRAM in a single package.

By combining the high-performance, ultra-low power SAMA5D2 with LPDDR2-SDRAM in a single package, PCB routing complexity, area and number of layers is reduced. This makes board design easier and lowers the overall cost of the bill of materials. Board design is more robust by facilitating design for EMI, ESD and signal integrity.

For more information about the SiP, see Reference Documents. The sole reference documents for product information on the SAMA5D2 and the LPDDR2-SDRAM memory are provided in this section.

The ATSAMA5D27C-LD2G-CU is available in a 361-ball TFBGA package.

The Microchip SAMA5D27 System-On-Module (SOM) provides global system Reset (NRST) and Shutdown (SHDN) pins to the application board.

• The NRST signal is an input/output pin generated by the internal Power Management Unit (MCP16502) in conjunction with power sequence timing. It is used to reset the internal microcontroller, the Ethernet transceiver and the rest of the customer application board. It can then be forced externally in case of a system crash.
• The SHDN pin is an output pin managed by the software application. In an application case, the pin switches on/off the external main supply VDD_MAIN.