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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.29 BORH (Or 4-bit Immediate Data to Higher 4 Bits of Byte
Data in Memory)
Takes the logical OR of the 4-bit immediate data and the higher 4 bits of byte data at
memory address "Ri", stores the results to the memory address corresponding to "Ri".
The CPU will not accept hold requests between the memory read operation and the
memory write operation of this request.
■ BORH (Or 4-bit Immediate Data to Higher 4 Bits of Byte Data in Memory)
Assembler format: BORH #u4, @Ri
Operation: {u4 < < 4} or (Ri) → (Ri) [Operation uses higher 4 bits only]
Flag change:
N, Z, V, and C: Unchanged
Execution cycles: 1 + 2a cycles
Instruction format:
NZVC
––––
MSB LSB
10010001 u4 Ri