SAB83C515A-5N18 View Datasheet(PDF) - Infineon Technologies

Part Name

Description

Manufacturer

SAB83C515A-5N18

8-Bit CMOS Single-Chip Microcontroller

Infineon Technologies 

SAB 80C515A/83C515A-5

Program Memory ('Code Space')

The SAB 83C515A-5 has 32 Kbyte of on-chip ROM, while the SAB 80C515A has no internal

ROM. The program memory can externally be expanded up to 64 Kbyte. Pin EA determines

whether program fetches below address 8000H are done from internal or external memory.

As a new feature the SAB 83C515A-5 offers the possibility of protecting the internal ROM

against unauthorized access. This protection is implemented in the ROM-Mask. Therefore, the

decision ROM-Protection 'yes' or 'no' has to be made when delivering the ROM-Code. Once

enabled, there is no way of disabling the ROM-Protection.

Effect: The access to internal ROM done by an externally fetched MOVC instruction is

disabled. Nevertheless, an access from internal ROM to external ROM is possible.

To verify the read protected ROM-Code a special ROM-Verify-Mode is implemented. This

mode also can be used to verify unprotected internal ROM.

ROM -Protection ROM-Verification Mode

(see 'AC Characteristics')

no

ROM-Verification Mode 1

(standard 8051 Verification Mode)

ROM-Verification Mode 2

yes

ROM-Verification Mode 2

Restrictions

–

– standard 8051

Verification Mode is

disabled

– externally applied MOVC

accessing internal ROM

is disabled

Semiconductor Group

13

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