P89LPC924 Philips Semiconductors, P89LPC924 Datasheet - Page 9

• Manufacturer Part Number: P89LPC924
• Description: (P89LPC924 / P89LPC925) 8-bit microcontrollers
• Manufacturer: Philips Semiconductors

Philips Semiconductors
7. Special function registers
9397 750 14471
Product data
Remark: Special Function Registers (SFRs) 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. 03 — 15 December 2004
8-bit microcontrollers with accelerated two-clock 80C51 core
P89LPC924/925
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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