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PIC16LF1824 Datasheet(PDF) 40 Page - Microchip Technology |
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PIC16LF1824 Datasheet(HTML) 40 Page - Microchip Technology |
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40 / 440 page  PIC16(L)F1847 DS40001453D-page 40 Preliminary 2011-2013 Microchip Technology Inc. FIGURE 3-5: ACCESSING THE STACK EXAMPLE 2 FIGURE 3-6: ACCESSING THE STACK EXAMPLE 3 TOSH:TOSL 0x0F 0x0E 0x0D 0x0C 0x0B 0x0A 0x09 0x08 0x03 0x02 0x01 0x00 0x04 0x05 0x06 0x07 Return Address This figure shows the stack configuration after the first CALL or a single interrupt. If a RETURN instruction is executed, the return address will be placed in the Program Counter and the Stack Pointer decremented to the empty state (0x1F). STKPTR = 0x00 TOSH:TOSL 0x0F 0x0E 0x0D 0x0C 0x0B 0x0A 0x09 0x08 0x03 0x02 0x01 0x00 0x04 0x05 0x06 0x07 Return Address After seven CALLs, or six CALLs and an interrupt, the stack looks like the figure on the left. A series of RETURN instructions will repeatedly place the return addresses into the Program Counter and pop the stack. STKPTR = 0x06 Return Address Return Address Return Address Return Address Return Address Return Address |
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