P51XAG30KFA PHILIPS [NXP Semiconductors], P51XAG30KFA Datasheet - Page 32

• Manufacturer Part Number: P51XAG30KFA
• Description: XA 16-bit microcontroller family 32K/512 OTP/ROM/ROMless, watchdog, 2 UARTs
• Manufacturer: PHILIPS [NXP Semiconductors]

1. P – programmed. U – unprogrammed.
2. Any other combination of the security bits is not defined.
Philips Semiconductors
EPROM CHARACTERISTICS
The XA-G37 is programmed by using a modified Improved
Quick-Pulse Programming
the same as that used by the later 80C51 family EPROM parts.
However different pins are used for many programming functions.
Detailed EPROM programming information may be obtained from
the internet at www.philipsmcu.com/ftp.html.
The XA-G3 contains three signature bytes that can be read and
used by an EPROM programming system to identify the device. The
signature bytes identify the device as an XA-Gx manufactured by
Philips.
Table 6. Program Security Bits
NOTES:
ROM CODE SUBMISSION
When submitting ROM code for the XA-G33, the following must be specified:
1. 32k bytes user ROM data.
2. ROM security bits.
1999 Apr 07
Trademark phrase of Intel Corporation.
XA 16-bit microcontroller family
32K/512 OTP/ROM/ROMless, watchdog, 2 UARTs
ADDRESS
0000H to 7FFFH
8020H
8020H
8020H
1
2
3
4
PROGRAM LOCK BITS
SB1
U
P
P
P
SB2
U
U
P
P
algorithm. This algorithm is essentially
SB3
U
U
U
P
CONTENT
DATA
SECURITY BIT
SECURITY BIT
SECURITY BIT
PROTECTION DESCRIPTION
No Program Security features enabled.
MOVC instructions executed from external program memory are disabled from fetching code bytes
from internal memory and further programming of the EPROM is disabled.
Same as 2, also verify is disabled.
Same as 3, external execution is disabled. Internal data RAM is not accessible.
32
BIT(S)
7:0
0
1
3
Security Bits
With none of the security bits programmed the code in the program
memory can be verified. When only security bit 1 (see Table 6) is
programmed, MOVC instructions executed from external program
memory are disabled from fetching code bytes from the internal
memory. All further programming of the EPROM is disabled. When
security bits 1 and 2 are programmed, in addition to the above,
verify mode is disabled. When all three security bits are
programmed, all of the conditions above apply and all external
program memory execution is disabled. (See Table 6)
COMMENT
User ROM Data
ROM Security Bit 1
0 = enable security
1 = disable security
ROM Security Bit 2
0 = enable security
1 = disable security
ROM Security Bit 3
0 = enable security
1 = disable security
Product specification
XA-G3