VRS51L580 mcus equivalent, (vrs51x570 / vrs51x580) versa 8051 mcus.
These devices also include a fifth, 4-bit, I/O port mapped into the “no connect” pins of the standard 8051/52 package. This provides a total of 36 I/Os while maintaining.
requiring large amounts of program/data memory, coupled with comprehensive peripheral support, the VRS51x570/580 devices.
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