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ST20C2 Datasheet(PDF) 176 Page - STMicroelectronics |
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ST20C2 Datasheet(HTML) 176 Page - STMicroelectronics |
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176 / 212 page  stshadow ® 176/212 stshadow store shadow registers Code: 60 FD Description: Selectively store shadow registers of priority Breg into the block of store addressed by Creg. This instruction is normally used in high priority with Breg set to 1 for low priority. Storing high priority registers from low priority will give undefined values. Definition: if (Areg0 = 1) { word ′[Creg] 16..23 ← GlobalInterruptEnables word ′[Creg] 0..13 ← TrapEnables[Breg] } if (Areg1 = 1) { word ′[Creg @ 1] ← Status[Breg] word ′[Creg @ 2] ← Wptr[Breg] word ′[Creg @ 3] ← Iptr[Breg] } if (Areg2 = 1) { word ′[Creg @ 4] ← Areg[Breg] word ′[Creg @ 5] ← Breg[Breg] word ′[Creg @ 6] ← Creg[Breg] } if (Areg3 = 1) Store block move registers for priority Breg in word ′[Creg @ 7] .. word′[Creg @ 11] Areg ′← undefined Breg ′← undefined Creg ′← undefined Error signals: none Comments: Secondar y instruction. See also: ldshadow restart |
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