© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
User manual Rev. 02 — 23 May 2005 124 of 133
Philips Semiconductors UM10109
P89LPC932A1 User manual
This device has three security bits associated with each of its eight sectors, as shown in
Table103
4 WDSE Watchdog Safety Enable bit. Refer to Table 86 “Watchdog timer configuration” for details.
5 BOE Brownout Detect Enable (see Section 5.1 “Brownout detection”)
6 RPE Reset pin enable. When set = 1, enables the reset function of pin P1.5. When cleared, P1.5 may be used as
an input pin. NOTE: During a power-up sequence, the RPE selection is overridden and this pin will always
functions as a reset input. After power-up the pin will function as defined by the RPE bit. Only a power-up
reset will temporarily override the selection defined by RPE bit. Other sources of reset will not override the
RPE bit.
7 WDTE Watchdog timer reset enable. When set =1, enables the watchdog timer reset. When cleared = 0, disables
the watchdog timer reset. The timer may still be used to generate an interrupt. Refer to Table 86 “Watchdog
timer configuration” for details.
Table 101: Flash User Configuration Byte (UCFG1) bit description …continued
Bit Symbol Description
Table 102: Oscillator type selection
FOSC[2:0] Oscillator configuration
111 External clock input on XTAL1.
100 Watchdog Oscillator, 400kHz (+20/ −30 % tolerance).
011 Internal RC oscillator, 7.373 MHz ± 2.5 %.
010 Low frequency crystal, 20 kHz to 100kHz.
001 Medium frequency crystal or resonator, 100kHz to 4 MHz.
000 High frequency crystal or resonator, 4MHz to 12 MHz.
Table 103: Sector Security Bytes (SECx) bit allocation
Bit 76543210
Symbol-----EDISxSPEDISx MOVCDISx
Unprogrammed
value
00000000
Table 104: Sector Security Bytes (SECx) bit description
Bit Symbol Description
0 MOVCDISx MOVC Disable. Disables the MOVC command for sector x. Any MOVC that attempts to read a byte in a
MOVC protected sector will return invalid data. This bit can only be erased when sector x is erased.
1 SPEDISx Sector Program Erase Disable x. Disables program or erase of all or part of sector x. This bit and sector
x are erased by either a sector erase command (ISP, IAP, commercial programmer) or a 'global' erase
command (commercial programmer).
2 EDISx Erase Disable ISP. Disables the ability to perform an erase of sector x in ISP or IAP mode. When
programmed, this bit and sector x can only be erased by a 'global' erase command using a commercial
programmer. This bit and sector x CANNOT be erased in ISP or IAP modes.
3:7 - reserved