P89LPC980 NXP [NXP Semiconductors], P89LPC980 Datasheet - Page 14

• Manufacturer Part Number: P89LPC980
• Description: 8-bit microcontroller with accelerated two-clock 80C51 core, 4 kB/8 kB wide-voltage byte-erasable flash with 10-bit ADC
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
7. Functional description
P89LPC980_982_983_985_2
Preliminary data sheet
7.1 Special function registers
Remark: Please refer to the P89LPC980/982/983/985 User manual for a more detailed
functional description.
Remark: SFR accesses are restricted in the following ways:
•
•
•
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. 02 — 8 February 2010
8-bit microcontroller with accelerated two-clock 80C51 core
P89LPC980/982/983/985
© NXP B.V. 2010. All rights reserved.
14 of 85