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H83069RF датащи(PDF) 62 Page - Renesas Technology Corp

номер детали H83069RF
подробное описание детали  Renesas 16-Bit Single-Chip Microcomputer
PDF  1003 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H83069RF датащи(HTML) 62 Page - Renesas Technology Corp

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Rev. 5.0, 09/04, page 40 of 978
op
NOP, RTS, etc.
op
rn
rm
op
rn
rm
EA (disp)
Operation field only
ADD.B Rn, Rm, etc.
Operation field and register fields
MOV.B @(d:16, Rn), Rm
Operation field, register fields, and effective address extension
BRA d:8
Operation field, effective address extension, and condition field
op
cc
EA (disp)
Figure 2.9 Instruction Formats
2.6.5
Notes on Use of Bit Manipulation Instructions
The BSET, BCLR, BNOT, BST, and BIST instructions read a byte of data, modify a bit in the
byte, then write the byte back. Care is required when these instructions are used to access registers
with write-only bits, or to access ports.
Step
Description
1
Read
Read one data byte at the specified address
2
Modify
Modify one bit in the data byte
3
Write
Write the modified data byte back to the specified address
Example 1: BCLR is executed to clear bit 0 in the port 4 data direction register (P4DDR) under
the following conditions.
P47, P46:
Input pins
P45 – P40: Output pins
The intended purpose of this BCLR instruction is to switch P40 from output to input.
Before Execution of BCLR Instruction
P47
P46
P45
P44
P43
P42
P41
P40
Input/output
Input
Input
Output
Output
Output
Output
Output
Output
DDR
0011
1111



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