P89V51RD2 Philips Semiconductors, P89V51RD2 Datasheet - Page 10
P89V51RD2
Manufacturer Part Number
P89V51RD2
Description
8-bit 80C51 5 V low power 64 kB Flash microcontroller with 1 kB RAM
Manufacturer
Philips Semiconductors
Datasheet
1.P89V51RD2.pdf
(75 pages)
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Philips Semiconductors
6. Special function registers
9397 750 12964
Product data
Remark: Special Function Registers (SFRs) 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
– ‘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.
when read (even if it was written with ‘0’). It is a reserved bit and may be used in
future derivatives.
Rev. 01 — 01 March 2004
8-bit microcontrollers with 80C51 core
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
P89V51RD2
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