PIC16F15213 datasheet(52/420 Pages) MICROCHIP

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Figure 9-11. Accessing the Stack Example 3

Filename:

10-000043C.vsd

Title:

ACCESSING THE STACK EXAMPLE 3

Last Edit:

7/30/2013

First Used:

PIC16F1508/9

Note:

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.

Return Address

0x0F

0x0E

0x0D

0x0C

0x0B

0x0A

0x09

0x08

0x07

0x06

0x04

0x05

0x03

0x02

0x01

0x00

Return Address

TOSH:TOSL

Rev. 10-000043C

7/30/2013

Figure 9-12. Accessing the Stack Example 4

Filename:

10-000043D.vsd

Title:

ACCESSING THE STACK EXAMPLE 4

Last Edit:

7/30/2013

First Used:

PIC16F1508/9

Note:

STKPTR = 0x10

When the stack is full, the next CALL or

an interrupt will set the Stack Pointer to

0x10. This is identical to address 0x00 so

the stack will wrap and overwrite the

return address at 0x00. If the Stack

Overflow/Underflow Reset is enabled, a

Reset will occur and location 0x00 will

not be overwritten.

Return Address

0x0F

0x0E

0x0D

0x0C

0x0B

0x0A

0x09

0x08

0x07

0x06

0x04

0x05

0x03

0x02

0x01

0x00

Return Address

TOSH:TOSL

Rev. 10-000043D

7/30/2013

PIC16F15213/14/23/24/43/44

Memory Organization

Preliminary Datasheet

DS40002195A-page 52

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