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PIC12F1822-I/MF 数据表(PDF) 44 Page - Microchip Technology |
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PIC12F1822-I/MF 数据表(HTML) 44 Page - Microchip Technology |
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44 / 398 page  PIC12F/LF1822/16F/LF1823 DS41413A-page 44 Preliminary 2010 Microchip Technology Inc. FIGURE 3-5: ACCESSING THE STACK EXAMPLE 2 FIGURE 3-6: ACCESSING THE STACK EXAMPLE 3 0x0F 0x0E 0x0D 0x0C 0x0B 0x0A 0x09 0x08 0x07 0x06 0x05 0x04 0x03 0x02 0x01 Return Address 0x00 STKPTR = 0x00 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). TOSH:TOSL 0x0F 0x0E 0x0D 0x0C 0x0B 0x0A 0x09 0x08 0x07 Return Address 0x06 Return Address 0x05 Return Address 0x04 Return Address 0x03 Return Address 0x02 Return Address 0x01 Return Address 0x00 STKPTR = 0x06 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. TOSH:TOSL |
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