80C554 Datasheet, PDF (74/76 Pages) NXP Semiconductors – 80C51 8-bit microcontroller . 6 clock operation 16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O, 64L LQFP

Philips Semiconductors
80C51 8-bit microcontroller – 6 clock operation
16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I²C, PWM,
capture/compare, high I/O, 64L LQFP
Preliminary specification
80C554/83C554/87C554
ROM CODE SUBMISSION FOR 16K ROM DEVICES
When submitting ROM code for the 16k ROM devices, the following must be specified:
1. 16k byte user ROM data
2. ROM security bits.
ADDRESS
0000H to 3FFFH
4000H to 403FH
CONTENT
DATA
KEY
BIT(S)
7:0
7:0
4040H
SEC
0
4040H
SEC
1
4040H
SEC
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.
Security Bit 3: When programmed, inhibits external execution.
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
ROM Security Bit 3
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
Security Bit #3: V Enabled
V Disabled
Purchase of Philips I²C components conveys a license under the Philips’ I²C patent
to use the components in the I²C system provided the system conforms to the
I²C specifications defined by Philips. This specification can be ordered using the
code 9398 393 40011.
2000 Nov 10
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