p87lpc778 NXP Semiconductors, p87lpc778 Datasheet - Page 8

• Manufacturer Part Number: p87lpc778
• Description: Cmos Single-chip 8-bit 80c51 Microcontroller 128-byte Data Ram, 8 Kb Otp
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7. Special function registers
9397 750 12378
Product data
Remark: Special Function Registers (SFRs) accesses are restricted in the following
ways:
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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 — 31 March 2004
CMOS single-chip 8-bit microcontroller
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
P87LPC778
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