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SM59R16A2 Datasheet(PDF) 19 Page - SyncMOS Technologies,Inc |
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SM59R16A2 Datasheet(HTML) 19 Page - SyncMOS Technologies,Inc |
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19 / 67 page  SM59R16A2/SM59R08A2 8-Bit Micro-controller 64KB/32KB ISP Flash & 2KB RAM embedded Specifications subject to change without notice contact your sales representatives for the most recent information. ISSFD-M034 19 Ver.B SM59R16A2/SM59R08A2 06/2009 4 CPU Engine The SM59R16A2/SM59R08A2 engine is composed of four components: a. Control unit b. Arithmetic – logic unit c. Memory control unit d. RAM and SFR control unit The SM59R16A2/SM59R08A2 engine allows to fetch instruction from program memory and to execute using RAM or SFR. The following paragraphs describe the main engine registers. Mnemonic Description Direct Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 RESET CPU Core ACC Accumulator E0h ACC.7 ACC.6 ACC.5 ACC.4 ACC.3 ACC.2 ACC.1 ACC.0 00h B B register F0h B.7 B.6 B.5 B.4 B.3 B.2 B.1 B.0 00h PSW Program status word D0h CY AC F0 RS [1:0] OV F1 P 00h SP Stack Pointer 81h SP [7:0] 07h DPL Data pointer low 0 82h DPL [7:0] 00h DPH Data pointer high 0 83h DPH [7:0] 00h DPL1 Data pointer low 1 84h DPL1 [7:0] 00h DPH1 Data pointer high 1 85h DPH1 [7:0] 00h DPS Data pointer select 92h - - - - - - - DPS.0 00h IFCON Interface control register 8Fh ITS - - - ALEC[1:0] DMEN - 00h 4.1 Accumulator ACC is the Accumulator register. Most instructions use the accumulator to store the operand. Mnemonic: ACC Address: E0h 7 6 5 4 3 2 1 0 Reset ACC.7 ACC.6 ACC05 ACC.4 ACC.3 ACC.2 ACC.1 ACC.0 00h ACC[7:0]: The A (or ACC) register is the standard 8052 accumulator. 4.2 B Register The B register is used during multiply and divide instructions. It can also be used as a scratch pad register to store temporary data. Mnemonic: B Address: F0h 7 6 5 4 3 2 1 0 Reset B.7 B.6 B.5 B.4 B.3 B.2 B.1 B.0 00h B[7:0]: The B register is the standard 8052 register that serves as a second accumulator. |
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