T89C51RD2-3CTC-M View Datasheet(PDF) - Atmel Corporation
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MFG CO.
'T89C51RD2-3CTC-M' PDF : 86 Pages View PDF
T89C51RD2
Table 33. API calls
API call
Parameter
READ copy of the device
ID # 1
Input Parameters:
R0 = osc freq (integer Not required, left for Philips compatibility)
R1 = 00h
DPH = 00h
DPL = 01h (device ID # 1)
Return Parameter
ACC = value of byte read
READ copy of the device
ID # 2
Input Parameters:
R0 = osc freq (integer Not required, left for Philips compatibility)
R1 = 00h
DPH = 00h
DPL = 02h (device ID # 2)
Return Parameter
ACC = value of byte read
READ copy of the device
ID # 3
Input Parameters:
R0 = osc freq (integer Not required, left for Philips compatibility)
R1 = 00h
DPH = 00h
DPL = 03h (device ID # 2)
Return Parameter
ACC = value of byte read
READ SOFTWARE
SECURITY BITS
Input Parameters:
R0 = osc freq (integer Not required, left for Philips compatibility)
R1 = 07h
DPH = 00h
DPL = 00h (Software security bits)
Return Parameter
ACC = value of byte read
READ copy of the
HARDWARE SECURITY
BITS
Input Parameters:
R0 = osc freq (integer Not required, left for Philips compatibility)
R1 = 07h
DPH = 00h
DPL = 03h (Hardtware security bits)
Return Parameter
ACC = value of byte read
READ BOOT VECTOR
Input Parameters:
R0 = osc freq (integer Not required, left for Philips compatibility)
R1 = 07h
DPH = 00h
DPL = 02h (boot vector)
Return Parameter
ACC = value of byte read
READ BOOTLOADER
VERSION
Input Parameters:
R0 = osc freq (integer Not required, left for Philips compatibility)
R1 = 08h
Return Parameter
ACC = value of byte read
READ BOOT STATUS
BYTE
Input Parameters:
R0 = osc freq (integer Not required, left for Philips compatibility)
R1 = 07h
DPH = 00h
DPL = 01h (status byte)
Return Parameter
ACC = value of byte read
63
Rev. F - 15 February, 2001
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