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© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
User manual Rev. 02 — 23 May 2005 111 of 133
Philips Semiconductors
UM10109
P89LPC932A1 User manual
• Write the address of the next byte to be programmed to FMADRL, if desired. (Not
needed for contiguous bytes since FMADRL is auto-incremented). All bytes to be
programmed must be within the same page.
• Write the data for the next byte to be programmed to FMDATA.
• Repeat writing of FMADRL and/or FMDATA until all desired bytes have been loaded
into the page register.
• Write the page address in user code memory to FMADRH and FMADRL[7:6], if not
previously included when writing the page register address to FMADRL[5:0].
• Write the erase-program command (68H) to FMCON, starting the erase-program
cycle.
• Read FMCON to check status. If aborted, repeat starting with the LOAD command.
An assembly language routine to load the page register and perform an erase/program
operation is shown below.
;**************************************************
;* pgm user code *
;**************************************************
;* *
;* Inputs: *
;*R3 = number of bytes to program (byte) *
;*R4 = page address MSB(byte) *
Table 94: Flash Memory Control register (FMCON - address E4h) bit allocation
Bit 7 6 5 4 3 2 1 0
Symbol (R)----HVAHVESVOI
Symbol (W) FMCMD.7 FMCMD.6 FMCMD.5 FMCMD.4 FMCMD.3 FMCMD.2 FMCMD.1 FMCMD.0
Reset00000000
Table 95: Flash Memory Control register (FMCON - address E4h) bit description
Bit Symbol Access Description
0 OI R Operation interrupted. Set when cycle aborted due to an interrupt or reset.
FMCMD.0 W Command byte bit 0.
1 SV R Security violation. Set when an attempt is made to program, erase, or CRC a secured sector or
page.
FMCMD.1 W Command byte bit 1
2 HVE R High voltage error. Set when an error occurs in the high voltage generator.
FMCMD.2 W Command byte bit 2.
3 HVA R High voltage abort. Set if either an interrupt or a brown-out is detected during a program or
erase cycle. Also set if the brown-out detector is disabled at the start of a program or erase
cycle.
FMCMD.3 W Command byte bit 3.
4:7 - R reserved
4:7 FMCMD.4 W Command byte bit 4.
4:7 FMCMD.5 W Command byte bit 5.
4:7 FMCMD.6 W Command byte bit 6.
4:7 FMCMD.7 W Command byte bit 7.