80C32EBAA datasheet(57/62 Pages) PHILIPS

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Philips Semiconductors

Product specification

80C52/80C54/80C58

CMOS single-chip 8-bit microcontrollers

1996 Aug 16

80C54 ROM CODE SUBMISSION

When submitting ROM code for the 80C54, the following must be specified:

1. 16k byte user ROM data

2. 64 byte ROM encryption key

3. ROM security bits.

ADDRESS

CONTENT

BIT(S)

COMMENT

0000H to 3FFFH

DATA

7:0

User ROM Data

4000H to 401FH

KEY

7:0

ROM Encryption Key

FFH = no encryption

4020H

SEC

ROM Security Bit 1

0 = enable security

1 = disable security

4020H

SEC

ROM Security Bit 2

0 = enable security

1 = disable security

Security Bit 1: When programmed, this bit has two effects on masked ROM parts:

1. External MOVC is disabled, and

2. EA is latched on Reset.

Security Bit 2: When programmed, this bit inhibits Verify User ROM.

If the ROM Code file does not include the options, the following information must be included with the ROM code.

For each of the following, check the appropriate box, and send to Philips along with the code:

Security Bit #1:

V Enabled

V Disabled

Security Bit #2:

V Enabled

V Disabled

Encryption:

V No

V Yes

If Yes, must send key file.

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