p89lpc972fn NXP Semiconductors, p89lpc972fn Datasheet - Page 10

• Manufacturer Part Number: p89lpc972fn
• Description: 8-bit Microcontroller With Accelerated Two-clock 80c51 Core 2kb/4 Kb/8 Kb Wide-voltage Byte-erasable ?ash
• Manufacturer: NXP Semiconductors

NXP Semiconductors
7. Functional description
P89LPC97X_1
Preliminary data sheet
7.1 Special function registers
Remark: Please refer to the P89LPC970/971/972 User manual for a more detailed
functional description.
Remark: SFR accesses are restricted in the following ways:
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•
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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 — 17 December 2009
8-bit microcontroller with accelerated two-clock 80C51 core
P89LPC970/971/972
© NXP B.V. 2009. All rights reserved.
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