NRF9E5 Datasheet, PDF (69/104 Pages) List of Unclassifed Manufacturers – 433/868/915MHz RF Transceiver with Embedded 8051 Compatible Microcontroller and 4 Input, 10 Bit ADC

PRODUCT SPECIFICATION
nRF9 E5 Single Chip Transceiver with Embedded Microcontroller and ADC
18.6 Special Function Registers
The Special Function Registers (SFRs) control several of the features of the nRF9E5.
Most of the nRF9E5 SFRs are identical to the standard 8051 SFRs. However, there are
additional SFRs that control features that are not available in the standard 8051. Table
61 lists the nRF9E5 SFRs and indicates which SFRs are not included in the standard
8051 SFR space. When writing software for the nRF9E5, use equate statements to
define the SFRs that are specific to the nRF9E5 and custom peripherals. In Table 61,
SFR bit positions that contain a 0 or a 1 cannot be written to and, when read, always
return the value shown (0 or 1). SFR bit positions that contain “–” are available but not
used. Table 62 shows the value of each SFR, after power-on reset or a watchdog reset,
together with a pointer to a detailled description of each register. Please note that any
unused address in the SFR address space is reserved and should not be written to.
Notes to Table 61 on next page :
(1) Not part of standard 8051 architecture.
(2) Registers unique to nRF9E5
(3) P0, P1 and P3 differ from standard 8051
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Revision: 1.1
Page 69 of 104
June 2004