PXAG49KFA PHILIPS [NXP Semiconductors], PXAG49KFA Datasheet - Page 18

• Manufacturer Part Number: PXAG49KFA
• Description: XA 16-bit microcontroller family 64K FLASH/2K RAM, watchdog, 2 UARTs
• Manufacturer: PHILIPS [NXP Semiconductors]

1. Any other combination of the Lock bits is not defined.
Philips Semiconductors
Security
The security feature protects against software piracy and prevents the contents of the Flash from being read. The Security Lock bits are located
in Flash. The XA-G49 has 3 programmable security lock bits that will provide different levels of protection for the on-chip code and data (see
Table 4).
Table 4.
NOTE:
2000 Apr 03
XA 16-bit microcontroller family
64K Flash/2K RAM, watchdog, 2 UARTs
ERASE SPECIAL CELL
READ SPECIAL CELL
Level
1
2
3
4
API CALL
SECURITY LOCK BITS
SB1
0
1
1
1
SB2
0
0
1
1
Input Parameters:
Return Parameters:
Input Parameters:
Return Parameters:
1
R0H = 95h
R6
R4L = 00 if pass, non–zero if fail
R0H = 96h
R6
R4L = value of byte read
SB3
0
0
0
1
= special cell address
= special cell address
0007h: read device ID #1
0008h: read device ID #2
0000h: erase BPSW[7:0]
0001h: erase BPSW[15:8]
0002h: erase BPC[7:0]
0003h: erase BPC[15:8]
0004h: erase status byte
0000h: read BPSW[7:0]
0001h: read BPSW[15:8]
0002h: read BPC[7:0]
0003h: read BPC[15:8]
0004h: read status byte
0006h: read manufacturer ID
000Ah: read security bit #1
000Ch: read security bit #2
000Eh: read security bit #3
No program security features enabled.
Inhibit writing to Flash. Also, MOVC instructions executed from external program memory
are disabled from fetching code bytes from internal memory.
Same as level 2, plus program verification is disabled
Same as level 3, plus external execution is disabled.
18
PROTECTION DESCRIPTION
PROTECTION DESCRIPTION
PARAMETER
Preliminary specification
XA-G49