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UPD78C18 Datasheet(PDF) 86 Page - NEC |
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UPD78C18 Datasheet(HTML) 86 Page - NEC |
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86 / 110 page  *1. Data is B2 if rpa2 = D + byte, H + byte. 2. Data is B3 if rpa3 = D + byte, H + byte. 3. In the State item, a figure is in the right side of slash if rpa2 and rpa3 are D + byte, H + A, H + B, H + EA, H + byte. Remarks The idle state when each instruction is skipped is different from the execution state as shown below. 1-byte instruction : 4 states 3-byte instruction (with *) : 10 states 2-byte instruction (with *) : 7 states 3-byte instruction : 11 states 2-byte instruction : 8 states 4-byte instruction : 14 states Notes 1. Instruction Group 2. Call instructions Mnemonic Operand B1 B2 B3 B4 Instruction Code State Operation Skip Condition RETI SK word f NOP irf HLT 100 (SP – 1) ← (PC + 1)H, (SP – 2) ← (PC + 1)L PCL ← (SP), PCH ← (SP + 1) PCL ← (SP), PCH ← (SP + 1), SP ← SP + 2 PCL ← (SP), PCH ← (SP + 1) Skip if (V. wa) bit = 1 Skip if f = 1 Skip if f = 0 Skip if irf = 1, then reset irf Skip if irf = 0 Enable Interrupt Disable Interrupt Set Halt Mode 10 13 10 8 CALT Offset 16 12 Uncondi- tional skip f = 1 SKN SKIT SKNIT DI STOP Set Stop Mode No Operation (V. wa)bit = 1 SOFTI RET RETS BIT * 00001F2 F1 F0 16 10 bit, wa f irf 01001000 00000000 10101010 10111010 01001000 01001000 0001 10111011 00111011 4 4 4 EI 01110010 10111000 1001 01100010 01011B2 B1 B0 ta 010I4 I3 I2 I1 I0 011I4 I3 I2 I1 I0 PCL ←(128+2ta),PCH←(129+2ta),SP←SP–2 (SP – 1) ←PSW, (SP – 2) ← (PC + 1)H, (SP – 3) ← (PC + 1)L, PC ← 0060H, SP ← SP – 3 Reset irf, if irf = 1 8 8 8 12 SP ←SP + 2 PC ← PC + n PSW ← (SP + 2), SP ← SP + 3 f = 0 irf = 1 irf = 0 |
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