Maxim Integrated 3-12
MAX31782 User’s Guide
Revision 0; 8/11
3.1.21 Frame Pointer Base Register (BP, Eh[7h])
Initialization: This register is cleared to 0000h on all forms of reset.
Access: Unrestricted direct read/write access.
3.1.22 General Register Byte-Swapped (GRS, Eh[8h])
Initialization: This register is cleared to 0000h on all forms of reset.
Access: Unrestricted read-only access.
3.1.23 General Register High Byte (GRH, Eh[9h])
Initialization: This register is cleared to 00h on all forms of reset.
Access: Unrestricted direct read/write access.
3.1.24 General Register Sign Extended Low Byte (GRXL, Eh[Ah])
Initialization: This register is cleared to 0000h on all forms of reset.
Access: Unrestricted direct read-only access.
3.1.25 Frame Pointer Register (FP, Eh[Bh])
Initialization: This register is cleared to 0000h on all forms of reset.
Access: Unrestricted direct read-only access.
3.1.26 Data Pointer 0 Register (DP[0], Fh[3h])
Initialization: This register is cleared to 0000h on all forms of reset.
Access: Unrestricted direct read/write access.
BIT FUNCTION
BP.[15:0]
This register serves as the base pointer for the frame pointer (FP). The frame pointer is formed by unsigned addi-
tion of frame pointer base register (BP) and frame pointer offset register (OFFS). The content of this base pointer
register is not affected by increment/decrement operations performed on the offset (OFFS) register.
BIT FUNCTION
GRS.[15:0]
This register is intended primarily for supporting byte operations on 16-bit data. This 16-bit read-only regis-
ter returns the byte-swapped value for the data contained in the GR register.
BIT FUNCTION
GRH.[7:0]
This register reflects the high byte of the GR register and is intended primarily for supporting byte operations
on 16-bit data. Any data written to the GRH register is also stored in the high byte of the GR register.
BIT FUNCTION
GRXL.[15:0] This register provides the sign extended low byte of GR as a 16-bit source.
BIT FUNCTION
FP.[15:0] This register provides the current value of the frame pointer (BP[OFFS]).
BIT FUNCTION
DP[0].[15:0]
This register is used as a pointer to access data memory. DP[0] can be automatically incremented or dec-
remented following each read operation, or can be automatically incremented or decremented before each
write operation.
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