P87C51FA Philips Semiconductors, P87C51FA Datasheet - Page 51

• Manufacturer Part Number: P87C51FA
• Description: 80C51 8-bit microcontroller family 8K.64K/256.1K OTP/ROM/ROMless/ low voltage 2.7V.5.5V/ low power/ high speed 33 MHz
• Manufacturer: Philips Semiconductors

Philips Semiconductors
ROM CODE SUBMISSION FOR 64K ROM DEVICE (83C51RD+)
When submitting ROM code for the 64K ROM devices, the following must be specified:
1. 64k byte user ROM data
2. 64 byte ROM encryption key
3. ROM security bits.
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:
2000 Aug 07
80C51 8-bit microcontroller family
8K–64K/256–1K OTP/ROM/ROMless, low voltage (2.7V–5.5V),
low power, high speed (33MHz)
ADDRESS
0000H to FFFFH
10000H to 1003FH
10040H
10040H
Security Bit #1:
Security Bit #2:
Encryption:
Enabled
Enabled
No
CONTENT
DATA
KEY
SEC
SEC
Disabled
Disabled
Yes
If Yes, must send
51
BIT(S)
7:0
7:0
0
1
8XC51RA+/RB+/RC+/RD+/80C51RA+
8XC51FA/FB/FC/80C51FA
COMMENT
User ROM Data
ROM Encryption Key
FFH = no encryption
ROM Security Bit 1
0 = enable security
1 = disable security
ROM Security Bit 2
0 = enable security
1 = disable security
Product specification
8XC54/58