P87C51RA2 Datasheet, PDF (62/67 Pages) NXP Semiconductors – 80C51 Central Processing Unit

Philips Semiconductors
80C51 8-bit microcontroller family 8KB/16KB/32KB/64KB OTP
with 512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high
speed (30/33 MHz)
Product data
P87C51RA2/RB2/RC2/RD2
ROM CODE SUBMISSION FOR 64K ROM DEVICE (87C51RD2)
When submitting ROM code for the 64K ROM devices, the following must be specified:
1. 64 kbyte user ROM data
2. 64 byte ROM encryption key
3. ROM security bits.
ADDRESS
0000H to FFFFH
10000H to 1003FH
CONTENT
DATA
KEY
BIT(S)
7:0
7:0
10040H
SEC
0
10040H
SEC
1
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.
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
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
2003 Jan 24
62