參數(shù)資料
型號(hào)： 78P0914
廠商： NEC Corp.
英文描述： Common to 78K/0 Series
中文描述： 共同的78K / 0系列
文件頁數(shù)： 114/129頁
文件大?。?/td> 644K
代理商： 78P0914
114
CHAPTER 5 EXPLANATION OF INSTRUCTIONS
User's Manual U12326EJ4V0UM
Branch if True and Clear
BTCLR
Conditional Branch and Clear by Bit Test (Byte Data Bit = 1)
[Instruction format]
BTCLR bit, $addr16
[Operation]
PC
←
PC+b+jdisp8 if bit = 1, then bit
←
0
[Operand]
Mnemonic
Operand(bit,$addr16)
b(Number of bytes)
BTCLR
saddr.bit, $addr16
4
sfr.bit, $addr16
4
A.bit, $addr16
3
PSW.bit, $addr16
4
[HL].bit, $addr16
3
[Flag]
bit =PSW.bit
In all other cases
Z
AC
CY
Z
AC
CY
×
×
×
[Description]
If the 1st operand (bit) contents have been set (1), they are cleared (0) and branched to the address specified
by the 2nd operand.
If the 1st operand (bit) contents have not been set (1), no processing is carried out and the subsequent
instruction is executed.
When the 1st operand (bit) is PSW.bit, the corresponding flag contents are cleared (0).
[Description example]
BTCLR PSW.0, $356H;
When bit 0 (CY flag) of PSW is 1, the CY flag is cleared to 0 and branched to address
0356H (with the start of this instruction set in the range of addresses 02D4H to
03D3H).
相關(guān)PDF資料
PDF描述
780208 Common to 78K/0 Series
780228 Common to 78K/0 Series
780308 Common to 78K/0 Series
780308Y Common to 78K/0 Series
78058FY Common to 78K/0 Series
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