P89C668 Philips Semiconductors, P89C668 Datasheet - Page 50

• 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
80C51 8-bit Flash microcontroller family
64KB ISP Flash with 8KB RAM
PROGRAM BOOT VECTOR
READ DEVICE DATA
READ MANUFACTURER ID
READ DEVICE ID # 1
READ DEVICE ID # 2
READ SECURITY BITS
READ STATUS BYTE
READ BOOT VECTOR
IAP CALL
Input Parameters:
Return Parameter
Input Parameters:
Return Parameter
Input Parameters:
Return Parameter
Input Parameters:
Return Parameter
Input Parameters:
Return Parameter
Input Parameters:
Return Parameter
Input Parameters:
Return Parameter
Input Parameters:
Return Parameter
R0 = osc freq (integer)
R1 = 06h
R1 = 86h (WDT feed)
DPH = 00h
DPL = 01h – program boot vector
ACC = boot vector
ACC = boot vector
R1 = 03h
R1 = 83h (WDT feed)
DPTR = address of byte to read
ACC = value of byte read
R0 = osc freq (integer)
R1 = 00h
R1 = 80h (WDT feed)
DPH = 00h
DPL = 00h (manufacturer ID)
ACC = value of byte read
R0 = osc freq (integer)
R1 = 00h
R1 = 80h (WDT feed)
DPH = 00h
DPL = 01h (device ID # 1)
ACC = value of byte read
R0 = osc freq (integer)
R1 = 00h
R1 = 80h (WDT feed)
DPH = 00h
DPL = 02h (device ID # 2)
ACC = value of byte read
R0 = osc freq (integer)
R1 = 07h
R1 = 87h (WDT feed)
DPH = 00h
DPL = 00h (security bits)
ACC = value of byte read
R0 = osc freq (integer)
R1 = 07h
R1 = 87h (WDT feed)
DPH = 00h
DPL = 01h (status byte)
ACC = value of byte read
R0 = osc freq (integer)
R1 = 07h
R1 = 87h (WDT feed)
DPH = 00h
DPL = 02h (boot vector)
ACC = value of byte read
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PARAMETER
P89C668
Preliminary data