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D17133CS Datasheet

  • D17133CS

  • 4-BIT SINGLE-CHIP MICROCONTROLLER

  • 289頁

  • NEC   NEC

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CHAPTER 9
REGISTER FILE (RF)
9.2.3 Register File Manipulation Instructions
Reading and writing data to and from the register file is done using the window register (WR: address 78H) located
in the system register.
Reading and writing of data is performed using the following dedicated instructions:
PEEK WR, rf: Read the data in the address specified by rf and put it into WR.
POKE rf, WR: Write the data in WR into the address specified by rf.
Below is an example using the PEEK and POKE instructions.
Example
M030
M032
RF11
RF33
RF70
RF73
MEM
MEM
MEM
MEM
MEM
MEM
; BANK0
<1>
PEEK
WR, RF11
;
0.30H
0.32H
0.91H
0.B3H
0.70H
0.73H
; Address 30H of the data memory is used as save area of WR.
; Address 32H of the data memory is used as operation area of WR.
; Symbol definition
; Register file addresses 00H to 3FH must be defined with
; symbols as BANK0 address 80H to BFH.
; Refer to
9.4 NOTES ON USING THE REGISTER FILE
for details.
CLR1
CLR1
OR
<2>
LD
MPE
IXE
; Shows the example of saving WR contents to the general data
; memory (addresses 00H to 3FH). For example, it shows the
RPL, #0110B ; case of saving WR contents to address 30H of the data memory
M030, WR
; without address modification.
<3>
<4>
<5>
POKE
PEEK
POKE
RF73, WR
WR, RF70
RF33, WR
; Data memory of addresses 40H to 7FH and control register can
; transmit/receive data to/from WR directly by PEEK and POKE
; instruction.
<6>
ST
WR, M032
;
73

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