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PM0044 数据表(PDF) 92 Page - STMicroelectronics |
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PM0044 数据表(HTML) 92 Page - STMicroelectronics |
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92 / 162 page ![]() STM8 instruction set PM0044 92/162 Doc ID 13590 Rev 3 Syntax CLR dst e.g. CLR A Operation dst <= 00 Description The destination byte is forced to 00 value. The destination is either a memory byte location or the accumulator. This instruction is compact, and does not affect any register when used with RAM variables. Instruction overview N: 0 Cleared Z: 1 Set Detailed description See also: LD CLR Clear CLR mnem dst Affected condition flags VI1 H I0 N Z C CLR Mem - --- 0 1 - CLR A 0 1 dst Asm cy lgth Op-code(s) ST7 ACLR A 1 1 4F ✗ shortmem CLR $10 1 2 3F XX ✗ longmem CLR $1000 1 4 72 5F MS LS (X) CLR (X) 1 1 7F ✗ (shortoff.X) CLR ($10,X) 1 2 6F XX ✗ (longoff,X) CLR ($1000,X) 1 4 72 4F MS LS (Y) CLR (Y) 1 2 90 7F ✗ (shortoff,Y) CLR ($10,Y) 1 3 90 6F XX ✗ (longoff,Y) CLR ($1000,Y) 1 4 90 4F MS LS (shortoff,SP) CLR ($10,SP) 1 2 0F XX [shortptr.w] CLR [$10] 4 3 92 3F XX ✗ [longptr.w] CLR [$1000].w 4 4 72 3F MS LS ([shortptr.w],X) CLR ([$10],X) 4 3 92 6F XX ✗ ([longptr.w].X] CLR ([$1000.w],X) 4 4 72 6F MS LS ([shortptr.w],Y) CLR ([$10],Y) 4 3 91 6F XX ✗ |
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