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Philips Semiconductors
1.3 Special function registers
Remark: Special Function Registers (SFRs) accesses are restricted in the following ways:
User manual
•
User must not attempt to access any SFR locations not defined.
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Accesses to any defined SFR locations must be strictly for the functions for the SFRs.
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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.
Rev. 03 — 7 June 2005
UM10119
P89LPC938 User manual
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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