P89LPC915_916_917 NXP Semiconductors, P89LPC915_916_917 Datasheet - Page 18

• Manufacturer Part Number: P89LPC915_916_917
• Description: The P89LPC915/916/917 are single-chip microcontrollers, available in low-cost packages,based on a high performance processor architecture that executes instructions in two tofour clocks, six times the rate of standard 80C51 devices
• Manufacturer: NXP Semiconductors

NXP Semiconductors
8. Functional description
P89LPC915_916_917_5
Product data sheet
8.1 Special function registers
Remark: SFR 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. 05 — 15 December 2009
8-bit microcontrollers with accelerated two-clock 80C51 core
P89LPC915/916/917
© NXP B.V. 2009. All rights reserved.
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