Philips Semiconductors Product specification
80C51/87C51/80C52/87C52
80C51 8-bit microcontroller family
4 K/8 K OTP/ROM low voltage (2.7 V–5.5 V),
low power, high speed (33 MHz), 128/256 B RAM
2000 Aug 07
34
80C51 ROM CODE SUBMISSION
When submitting ROM code for the 80C51, the following must be specified:
1. 4k byte user ROM data
2. 64 byte ROM encryption key
3. ROM security bits.
ADDRESS
CONTENT BIT(S) COMMENT
0000H to 0FFFH DATA 7:0 User ROM Data
1000H to 103FH KEY 7:0 ROM Encryption Key
1040H SEC 0 ROM Security Bit 1
1040H SEC 1 ROM Security Bit 2
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.
NOTE: Security Bit 2 cannot be enabled unless Security Bit 1 is enabled.
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.
80C52 ROM CODE SUBMISSION
When submitting ROM code for the 80C52, the following must be specified:
1. 8k byte user ROM data
2. 64 byte ROM encryption key
3. ROM security bits.
ADDRESS
CONTENT BIT(S) COMMENT
0000H to 1FFFH DATA 7:0 User ROM Data
2000H to 203FH KEY 7:0 ROM Encryption Key
2040H SEC 0 ROM Security Bit 1
2040H SEC 1 ROM Security Bit 2
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.
NOTE: Security Bit 2 cannot be enabled unless Security Bit 1 is enabled.
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.
