XA-C3 Datasheet, PDF(41/68 Page) NXP Semiconductors – XA 16-bit microcontroller family 32K/1024 OTP CAN transport layer controller 1 UART, 1 SPI Port, CAN 2.0B, 32 CAN ID Filters, transport layer co-proce

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XA-C3 Datasheet, PDF (41/68 Pages) NXP Semiconductors – XA 16-bit microcontroller family 32K/1024 OTP CAN transport layer controller 1 UART, 1 SPI Port, CAN 2.0B, 32 CAN ID Filters, transport layer co-proce

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Philips Semiconductors

XA 16-bit microcontroller family

32K/1024 OTP CAN transport layer controller

1 UART, 1 SPI Port, CAN 2.0B, 32 CAN ID filters, transport layer co-processor

Preliminary specification

XA-C3

VDD

RST

(NC)

XTAL2

XTAL1

VSS

VDD

SU00585A

Figure 33. IDD Test Condition, Power-Down Mode

Note: All other pins are disconnected. VDD=2V to 5.5V

signature bytes identify the device as an XAâGx manufactured by

Philips.

EPROM CHARACTERISTICS

The XAâC37 is programmed by using a modified Improved

QuickâPulse Programmingâ¢ algorithm. This algorithm is essentially

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 XAâC3 contains three signature bytes that can be read and

used by an EPROM programming system to identify the device. The

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 21) 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, in addition to the above, security bits 1 and 2 are

programmed, 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 21).

Table 21. PROGRAM Security Bits

PROGRAM LOCK BITS

SB1 SB2 SB3 PROTECTION DESCRIPTION

U No PROGRAM Security features enabled.

U MOVC instructions executed from External PROGRAM memory are disabled from fetching code

bytes from internal memory and further programming of the EPROM is disabled.

U Same as 2, also verify is disabled.

P Same as 3, External execution is disabled. Internal DATA RAM is not accessible.

NOTES:

1. P â programmed. U â unprogrammed.

2. Any other combination of the security bits is not defined.

2000 Jan 25

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