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PXAG49KBBD Datasheet(PDF) 18 Page - NXP Semiconductors

Part # PXAG49KBBD
Description  XA 16-bit microcontroller family
Download  42 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PXAG49KBBD Datasheet(HTML) 18 Page - NXP Semiconductors

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Philips Semiconductors
Preliminary data
XA-G49
XA 16-bit microcontroller family
64K Flash/2K RAM, watchdog, 2 UARTs
2001 Jun 27
18
API CALL
PARAMETER
ERASE SPECIAL CELL
Input Parameters:
R0H = 95h
R6
= special cell address
0000h: erase BPSW[7:0]
0001h: erase BPSW[15:8]
0002h: erase BPC[7:0]
0003h: erase BPC[15:8]
0004h: erase status byte
Return Parameters:
R4L = 00 if pass, non–zero if fail
READ SPECIAL CELL
Input Parameters:
R0H = 96h
R6
= special cell address
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
0007h: read device ID #1
0008h: read device ID #2
000Ah: read security bit #1
000Ch: read security bit #2
000Eh: read security bit #3
Return Parameters:
R4L = value of byte read
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 3).
Table 3.
SECURITY LOCK BITS1
PROTECTION DESCRIPTION
Level
SB1
SB2
SB3
PROTECTION DESCRIPTION
1
0
0
0
No program security features enabled.
2
1
0
0
Same as level 1, plus block erase is disabled. Erase or programming of the status byte or
boot vector is disabled.
3
1
1
0
Same as level 2, plus program verification is disabled
4
1
1
1
Same as level 3, plus external execution is disabled.
NOTE:
1. Any other combination of the Lock bits is not defined.
2. Security bits are independent of each other. Full-chip erase may be performed regardless of the states of the security bits.
3. Setting LB doesn’t prevent programming of unprogrammed bits.


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