P89V52X2FBD datasheet(8/57 Pages) NXP

Part #	P89V52X2FBD

Description	8-bit 80C51 low power 8 kB flash microcontroller with 256 B RAM, 192 B data EEPROM

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Manufacturer	NXP [NXP Semiconductors]

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8 / 57 page

P89V52X2_3

Product data sheet

Rev. 03 — 4 May 2009

8 of 57

NXP Semiconductors

P89V52X2

80C51 with 256 B RAM, 192 B data EEPROM

6.

Functional description

6.1 Special function registers

Remark: SFR accesses are restricted in the following ways:

• User must not attempt to access any SFR locations not deﬁned.

• Accesses to any deﬁned SFR locations must be strictly for the functions for the SFRs.

• SFR bits labeled ‘-’, ‘0’ or ‘1’ can only be written and read as follows:

– ‘-’ Unless otherwise speciﬁed, must be written with ‘0’, but can return any value

when read (even if it was written with ‘0’). It is a reserved bit and may be used in

future derivatives.

– ‘0’ must be written with ‘0’, and will return a ‘0’ when read.

– ‘1’ must be written with ‘1’, and will return a ‘1’ when read.

Similar Part No. - P89V52X2FBD

Manufacturer	Part #	Datasheet	Description
NXP Semiconductors	P89V52X2FBD	1Mb / 56P	8-bit 80C51 low power 8 kB flash microcontroller with 256 B RAM, 192 B data EEPROM Rev. 01-7 June 2007

Manufacturer	Part #	Datasheet	Description
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