PIC16F MICROCHIP [Microchip Technology], PIC16F Datasheet - Page 15

• Manufacturer Part Number: PIC16F
• Description: PIC16F/LF182X/PIC12F/LF1822 Memory Programming Specification
• Manufacturer: MICROCHIP [Microchip Technology]

4.3.3
The Load Data for Data Memory command will load a
14-bit “data word” when 16 cycles are applied.
However, the data memory is only 8 bits wide and thus,
only the first 8 bits of data after the Start bit will be
programmed into the data memory. It is still necessary
to cycle the clock the full 16 cycles in order to allow the
internal circuitry to reset properly (see Figure 4-3).
FIGURE 4-3:
4.3.4
The Read Data from Program Memory command will
transmit data bits out of the program memory map
currently accessed, starting with the second rising edge
of the clock input. The ICSPDAT pin will go into Output
mode on the first falling clock edge, and it will revert to
Input mode (high-impedance) after the 16th falling edge
of the clock. If the program memory is code-protected
(CP), the data will be read as zeros (see Figure 4-4).
FIGURE 4-4:
 2010 Microchip Technology Inc.
ICSPCLK
ICSPDAT
(from device)
ICSPDAT
(from Programmer)
ICSPCLK
ICSPDAT
LOAD DATA FOR DATA MEMORY
READ DATA FROM PROGRAM
MEMORY
LOAD DATA FOR DATA MEMORY COMMAND
READ DATA FROM PROGRAM MEMORY
1
0
1
1
2
0
2
1
PIC16F/LF182X/PIC12F/LF1822
3
1
3
0
4
Advance Information
0
Input
4
0
5
0
5
0
6
X
6
X
T
DLY
T
DLY
1
1
x
0
2
LSb
2
LSb
Output
15
MSb
15
MSb 0
16
DS41390C-page 15
16
Input