87C575 Philips Semiconductors, 87C575 Datasheet - Page 25

• Manufacturer Part Number: 87C575
• Description: 80C51 8-bit microcontroller family 8K/256 OTP/ROM/ROMless/ 4 comparator/ failure detect circuitry/ watchdog timer
• Manufacturer: Philips Semiconductors

1. See Watchdog Timer Specification for definition of WDL and WDCON bits.
Philips Semiconductors
ROM CODE SUBMISSION
When submitting ROM code for the 83C575, 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.
NOTES:
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.
ABSOLUTE MAXIMUM RATINGS
NOTES:
1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and
2. This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive static
3. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to V
1998 May 01
80C51 8-bit microcontroller family
8K/256 OTP/ROM/ROMless, 4 comparator, failure detect circuitry, watchdog timer
ADDRESS
0000H to 1FFFH
2000H to 201FH
2020H
2030H
2031H
2032H
2033H
2033H
2033H
2033H
2033H
2033H
Operating temperature under bias
Storage temperature range
Voltage on EA/V
Voltage on any other pin to V
Maximum I
Power dissipation (based on package heat transfer limitations, not
device power consumption)
functional operation of the device at these or any conditions other than those described in the AC and DC Electrical Characteristics section
of this specification is not implied.
charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated maxima.
noted.
OL
per I/O pin
PP
pin to V
SS
PARAMETER
SS
CONTENT
DATA
KEY
Reserved
Security Bit 2
Security Bit 1
Reserved
Reserved
WDL
WDCON
WDCON
WDCON
WDCON
WDCON
WDCON
1, 2, 3
1
1
1
1
1
1
1
BIT(S)
7:0
7:0
2
1
0
7:0
7:0
7:0
7:5
4
3
2
1
0
25
–55 to +125
–65 to +150
–0.5 to +6.5
0 to +13.0
RATING
1.5
15
COMMENT
User ROM Data
ROM Encryption Key
Must = 1
Must = FFH
Must = FFH
Watchdog reload value
PRE2:0
LVRE
OFRE
WDRUN=0, not ROM coded
WDTOF=0, not ROM coded
WDMOD
FFH = no encryption
0 = enable, 1 = disable
0 = enable, 1 = disable
(see specification)
80C575/83C575/
SS
unless otherwise
Product specification
87C575
UNIT
mA
W
V
V
C
C