Кто знает где находится PORT L о котором упоминается в "AVR1312: Using the XMEGA External Bus Interface" ? В разделе "2.1.3 Four-port Interface". Using the XMEGA External Bus Interface
Table 2-1. EBI Port Mode Mode Ports Used by EBI Module Two-port operation Port H and J Three-port operation Port H, J, and K Four-port operation Port H, J, K, and L
XMEGA A1 • Supports SRAM up to – 512K Bytes using 2-port EBI – 16M Bytes using 3-port EBI • Supports SDRAM up to – 128M bit using 3-port EBI • Four software configurable Chip Selects