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PM0044 датащи(PDF) 60 Page - STMicroelectronics

номер детали PM0044
подробное описание детали  STM8 CPU programming manual
PDF  162 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM0044 датащи(HTML) 60 Page - STMicroelectronics

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STM8 addressing modes
PM0044
60/162
Doc ID 13590 Rev 3
Figure 23.
Bit Long Direct Relative addressing mode example
After completion
b0 = 0
04AC
72
01
Adder
72
01
PC
EA
(Branch taken)
(EA)
Adder
04A7
New PC
04AC
Instruction Complete
New PC = EA = 04A7
Steps to Determine
Effective Address
PC = 04A7
PC = PC + 2 = 04A9
TEMP = (PC) = FC
PC = PC +1 = 04AC
Stop here if there
is no Branch; i.e., Test = TRUE (1)
EA = PC + TEMP
= 04AA + FD
= 04A7
New PC = EA if Branch is taken
wait_1
EA
05
PC
04A8
04A9
04A8
04A9
04A7
04A7
04A7
FB
04A7
b0 = 1
01
10
04A9
04AA
(EA)
04AC
New PC
Instruction Complete
New PC = EA = 04AC
04A8
04A7
04AC
After completion
(No branch taken)
DRA .byte
104C
104B
DRA
b0
BTJF DRA, #0, wait_1
DRA.b0 =? 0
10
EA = (PC):(PC+1) = 104B
PC = PC + 2 = 04AB
Test = (EA).b0
10
4B
04AB
wait_1
BTJF DRA, #0, wait_1
wait_1
BTJF DRA, #0, wait_1
04AA
4B
04AA
4B
04AC
FB
04AB
FB
04AB
FB
72
04A7



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