PIC16F datasheet(16/40 Pages) MICROCHIP

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PIC16F/LF182X/PIC12F/LF1822

DS41390C-page 16

Advance Information

 2010 Microchip Technology Inc.

4.3.5

READ DATA FROM DATA MEMORY

The Read Data from Data Memory command will

transmit data bits out of the data memory starting with

the second rising edge of the clock input. The ICSPDAT

pin will go into Output mode on the second rising edge,

and it will revert to Input mode (high-impedance) after

the 16th rising edge. The data memory is 8 bits wide,

and therefore, only the first 8 bits that are output are

actual data. If the data memory is code-protected, the

data is read as all zeros. A timing diagram of this

command is shown in Figure 4-5.

FIGURE 4-5:

READ DATA FROM DATA MEMORY COMMAND

4.3.6

INCREMENT ADDRESS

The address is incremented when this command is

received. It is not possible to decrement the address.

To reset this counter, the user must use the Reset

Address command or exit Program/Verify mode and re-

enter it.

If the address is incremented from address 7FFFh, it

will wrap-around to location 0000h. If the address is

incremented from FFFFh, it will wrap-around to location

8000h.

FIGURE 4-6:

INCREMENT ADDRESS

LSb

MSb

TDLY

ICSPCLK

ICSPDAT

Input

Output

(from Programmer)

ICSPDAT

(from device)

ICSPCLK

ICSPDAT

TDLY

Next Command

Address + 1

Address

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