Philips P89LPC938 User Manual page 118

Philips Semiconductors
Table 109: Flash Memory Control register (FMCON - address E4h) bit allocation
Bit 7
Symbol (R) -
Symbol (W) FMCMD.7
Reset 0
Table 110: Flash Memory Control register (FMCON - address E4h) bit description
Bit Symbol Access
0 OI R
FMCMD.0 W
1 SV R
FMCMD.1 W
2 HVE R
FMCMD.2 W
3 HVA R
FMCMD.3 W
4:7 - R
4:7 FMCMD.4 W
4:7 FMCMD.5 W
4:7 FMCMD.6 W
4:7 FMCMD.7 W
An assembly language routine to load the page register and perform an erase/program
operation is shown below.
User manual
•
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.
6 5
- -
FMCMD.6 FMCMD.5
0 0
Description
Operation interrupted. Set when cycle aborted due to an interrupt or reset.
Command byte bit 0.
Security violation. Set when an attempt is made to program, erase, or CRC a secured sector or
page.
Command byte bit 1
High voltage error. Set when an error occurs in the high voltage generator.
Command byte bit 2.
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.
Command byte bit 3.
reserved
Command byte bit 4.
Command byte bit 5.
Command byte bit 6.
Command byte bit 7.
;**************************************************
;* pgm user code *
;**************************************************
;*
;* Inputs:
;* R3 = number of bytes to program (byte)
;* R4 = page address MSB(byte)
;* R5 = page address LSB(byte)
;* R7 = pointer to data buffer in RAM(byte)
;* Outputs:
;* R7 = status (byte)
;* C = clear on no error, set on error
;**************************************************
LOAD EQU 00H
EP EQU 68H
Rev. 03 — 7 June 2005
4 3
- HVA
FMCMD.4 FMCMD.3
0 0
UM10119
P89LPC938 User manual
2 1
HVE SV
FMCMD.2 FMCMD.1
0 0
*
*
*
*
*
*
*
*
*
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
0
OI
FMCMD.0
0
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