83C576 Datasheet, PDF (28/46 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators, failure detect circuitry, watchdog timer

Philips Semiconductors
80C51 8-bit microcontroller family
8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators,
failure detect circuitry, watchdog timer
Product specification
83C576/87C576
ROM CODE SUBMISSION
When submitting ROM code for the 83C576, the following must be specified:
1. 8k byte user ROM data
2. 32 byte ROM encryption key
3. ROM security bits
4. The watchdog timer parameters. (See Watchdog Timer Specifications for definition of WDL and WDCON bits.)
ADDRESS
0000H to 1FFFH
2000H to 201FH
2020H
2030H
2031H
CONTENT
DATA
KEY
SEC
WDCON
WDL
BIT(S)
7:0
7:0
0
1
7:5
4
3
2
1
0
7:0
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
PRE2:0
LVRE
OFRE
DPD
WDRUN = 0, not ROM coded
WDMOD
Watchdog autoload value
(see specification)
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.
Watchdog/Timer Modes:
V Watchdog Mode
V Timer Mode
Prescaler Value:
Value
(Value = 64, 128, 256, 512, 1024, 2048, 4096, 8192)
Autoload Value (range 0–255):
Low Voltage Reset (Value 0 or 1):
Oscillator Fail Reset (Value 0 or 1):
Power-Down (Value 0 or 1):
1998 Jun 04
28