P89CV51RB2_RC2_RD2_3 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 03 — 25 August 2009 24 of 76
NXP Semiconductors
P89CV51RB2/RC2/RD2
80C51 with 1 kB RAM, SPI
6.3.8 IAP method
Several IAP calls are available for use by an application program to permit selective
erasing, reading and programming of flash pages, security bits, status bit, and device ID.
All calls are made through a common interface, PGM_MTP. The programming functions
are selected by setting up the microcontroller’s registers before making a call to
PGM_MTP at FFF0H. The IAP calls are shown in Table 12.
Table 12. IAP function calls
IAP function IAP call parameters
Read ID Input parameters:
R1 = 00H or 80H (WDT feed)
DPH = 00H
DPL = 00H = manufacturer ID
DPL = 01H = device ID 1
DPL = 02H = device ID 2
DPL = 03H = 6×/12× bit (if bit 7 = 1: 6×)
DPL = 80H = ISP version number
Return parameter(s):
ACC = requested parameter
Erase 4 kB code block (new
function)
Input parameters:
R0 = oscillator frequency (integer)
R1 = 0CH or 8CH (WDT feed)
DPH = address of 4 kB code block
DPH = 00H, 4 kB block 0, 0 kB to 4 kB
DPH = 10H, 4 kB block 1, 4 kB to 8 kB
DPH = 20H, 4 kB block 2, 8 kB to 12 kB
DPH = 30H, 4 kB block 3, 12 kB to 16 kB
DPH = 40H, 4 kB block 4, 16 kB to 20 kB
DPH = 50H, 4 kB block 5, 20 kB to 24 kB
DPH = 60H, 4 kB block 6, 24 kB to 28 kB
DPH = 70H, 4 kB block 7, 28 kB to 32 kB
DPH = 80H, 4 kB block 8, 32 kB to 36 kB
DPH = 90H, 4 kB block 9, 36 kB to 40 kB
DPH = A0H, 4 kB block 10, 40 kB to 44 kB
DPH = B0H, 4 kB block 11, 44 kB to 48 kB
DPH = C0H, 4 kB block 12, 48 kB to 52 kB
DPH = D0H, 4 kB block 13, 52 kB to 56 kB
DPH = E0H, 4 kB block 14, 56 kB to 60 kB
DPH = F0H, 4 kB block 15, 60 kB to 64 kB
DPL = 00H
Return parameter(s):
ACC = 00: pass
ACC is not 00: fail
