P89C668 Philips Semiconductors, P89C668 Datasheet - Page 48

• Manufacturer Part Number: P89C668
• Description: 80C51 8-bit Flash microcontroller family 64KB ISP FLASH with 8KB RAM
• Manufacturer: Philips Semiconductors

Philips Semiconductors
2001 Jul 27
RECORD TYPE
80C51 8-bit Flash microcontroller family
64KB ISP Flash with 8KB RAM
05
06
Miscellaneous Read Functions
General Format of Function 05
Where:
Example:
Direct Load of Baud Rate
General Format of Function 06
Where:
Example:
:02xxxx05ffsscc
02
xxxx
05
ffss
cc
:020000050001F8
:02xxxx06hhllcc
02
xxxx
06
hh
ll
cc
:02000006F50003
= number of bytes (hex) in record
= required field, but value is a “don’t care”
= “Miscellaneous Read” function code
= subfunction and selection code
= checksum
= number of bytes (hex) in record
= required field, but value is a “don’t care”
= ”Direct Load of Baud Rate” function code
= high byte of Timer 2
= low byte of Timer 2
= checksum
0000 = read signature byte – manufacturer id (15H)
0001 = read signature byte – device id # 1
0002 = read signature byte – device id # 2
0700 = read security bits
0701 = read status byte
0702 = read boot vector
read signature byte – device id # 1
COMMAND/DATA FUNCTION
48
(P89C668 = 81H)
(C2H)
P89C668
Preliminary data