Winbond MCU W78E365 Heximal Data Restoration means the content from both the eeprom and flash can be extracted and read out by the programmer directly,

The W78E365 architecture consists of a core controller surrounded by various registers, four general purpose I/O ports, one special purpose programmable 4-bits I/O port, 512 bytes of RAM, three timer/counters, a serial port, and an internal 74373 latch and 74244 buffer which can be switched to port2.

The processor supports 111 different opcodes and references both a 64K program address space and a 64 K data storage space.

The internal data RAM in the W78E62B is 512 bytes. It is divided into two banks: 256 bytes of scratchpad RAM and 256 bytes of AUX-RAM. These RAMs are addressed by different ways.

RAM 0H-127H can be addressed directly and indirectly as the same as in 8051. Address pointers are R0 and R1 of the selected register RAM 128H-255H can only be addressed indirectly as the same as in 8051 when Winbond MCU W78E365 Heximal Data Restoration.

Address pointers are R0, R1 of the selected registers internal program memory, an access to AUX-RAM will not affect the Ports P0, P2, WR and RD.
AUX-RAM 0H-255H is addressed indirectly as the same way to access external data memory with the MOVX instruction. Address pointer are R0 and R1 of the selected register bank and DPTR register.

An access to external data memory locations higher than 255H will be performed with the MOVX instruction in the same way as in the 8051. The AUX-RAM is disable after a reset.

Setting the bit 4 in CHPCON register will enable the access to AUX-RAM. When AUX-RAM is enabled the instructions of “MOVX @Ri” will always access to on-chip AUX-RAM after Winbond MCU W78E365 Heximal Data Restoration.

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