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SN8P1602AS Datasheet(PDF) 29 Page - SONiX Technology Company |
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SN8P1602AS Datasheet(HTML) 29 Page - SONiX Technology Company |
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29 / 94 page  SN8P1600 8-bit micro-controller SONiX TECHNOLOGY CO., LTD Page 29 Revision 1.94 STACK OPERATIONS OVERVIEW The stack buffer of SN8P1600 has 4-level high area and each level is 10-bit length. These buffers are designed to push and pop up program counter’s (PC) data when interrupt service routine is executed. The STKP register is a pointer designed to point active level in order to push or pop up data from stack buffer of kernel circuit. The STKnH and STKnL are the 10-bit stack buffers to store program counter (PC) data. STKP = 0 STKP = 1 STKP = 2 STKP = 3 STKP - 1 STKP + 1 CALL / interrupt RET / RETI STKP PCH PCL STKP STK0H STK1H STK2H STK3H STK0L STK1L STK2L STK3L STKP = 0 STKP = 1 STKP = 2 STKP = 3 STKP = 0 STKP = 1 STKP = 2 STKP = 3 STKP - 1 STKP + 1 CALL / interrupt RET / RETI STKP - 1 STKP + 1 STKP - 1 STKP - 1 STKP + 1 CALL / interrupt RET / RETI STKP STKP PCH PCL PCH PCH PCL PCL STKP STKP STK0H STK1H STK2H STK3H STK0L STK1L STK2L STK3L |
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