nRF24LE1 Nordic VLSI, nRF24LE1 Datasheet - Page 64

• Manufacturer Part Number: nRF24LE1
• Manufacturer: Nordic VLSI

nRF24LE1 Preliminary Product Specification
5.2.3
The PSW register contains status bits that reflect the current state of the MCU.
5.2.4
This register points to the top of stack in internal data memory space. It is used to store the return address
of a program before executing interrupt routine or subprograms. The SP is incremented before executing
PUSH or CALL instruction and it is decremented after executing POP or RET(I) instruction (it always points
to the top of stack).
5.2.5
The Data Pointer Registers can be accessed through DPL and DPH. The actual data pointer is selected by
DPS register.
These registers are intended to hold 16-bit address in the indirect addressing mode used by MOVX (move
external memory), MOVC (move program memory) or JMP (computed branch) instructions. They may be
manipulated as 16-bit register or as two separate 8-bit registers. DPH holds higher byte and DPL holds
lower byte of indirect address.
It is generally used to access external code or data space (for example, MOVC A, @A+DPTR or MOV A,
@DPTR respectively).
Revision 1.1
Address Bit Name
Note: The Parity bit can only be modified by hardware upon the state of ACC register.
Address
Address
0xD0
0x81
0x82
0x83
Program Status Word Register - PSW
Stack Pointer – SP
Data Pointer – DPH, DPL
4-3
7
6
5
2
1
0
cy
ac
ov
f0
rs
f1
p
Carry flag: Carry bit in arithmetic operations and accumulator for Boolean
operations.
Auxiliary Carry flag: Set if there is a carry-out from 3rd bit of Accumulator
in BCD operations
General purpose flag 0
Register bank select, bank 0..3 (0x00-0x07, 0x08-0x0f, 0x10-0x17, 0x18-
0x1f)
Overflow flag: Set if overflow in Accumulator during arithmetic operations
General purpose flag 1
Parity flag: Set if odd number of ‘1’ in ACC.
Table 24. Data Pointer register (DPH:DPL)
Table 22. PSW register
Table 23. SP register
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Register name
Register name
DPH
DPL
Description
SP