Maxim Integrated MAX31782 - Manual (Page 30)

MaximIntegrated 3-12
MAX31782 User’s Guide
Revision 0; 8/11
3.1.21FramePointerBaseRegister(BP,Eh[7h])
Initialization: This register is cleared to 0000h on all forms of reset .
Access: Unrestricted direct read/write access .
3.1.22GeneralRegisterByte-Swapped(GRS,Eh[8h])
Initialization: This register is cleared to 0000h on all forms of reset .
Access: Unrestricted read-only access .
3.1.23GeneralRegisterHighByte(GRH,Eh[9h])
Initialization: This register is cleared to 00h on all forms of reset .
Access: Unrestricted direct read/write access .
3.1.24GeneralRegisterSignExtendedLowByte(GRXL,Eh[Ah])
Initialization: This register is cleared to 0000h on all forms of reset .
Access: Unrestricted direct read-only access .
3.1.25FramePointerRegister(FP,Eh[Bh])
Initialization: This register is cleared to 0000h on all forms of reset .
Access: Unrestricted direct read-only access .
3.1.26DataPointer0Register(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 .