MA160014 Microchip Technology, MA160014 Datasheet - Page 363

• Manufacturer Part Number: MA160014
• Description: MOD PLUG-IN 44PIN PIC18LF45K22
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of MA160014

• Accessory Type: Plug-In Module (PIM) - PIC18LF45K10
• Product: Microcontroller Modules
• Data Bus Width: 8 bit
• Core Processor: PIC18LF45K22
• Interface Type: I2C, SPI
• Operating Supply Voltage: 1.8 V to 5.5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PICDEM PIC18 Explorer, DM183032
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

24.3.1
The program memory may be read to or written from
any location using the table read and table write
instructions. The device ID may be read with table
reads. The Configuration registers may be read and
written with the table read and table write instructions.
In normal execution mode, the CPn bits have no direct
effect. CPn bits inhibit external reads and writes. A block
of user memory may be protected from table writes if the
WRTn Configuration bit is ‘0’. The EBTRn bits control
table reads. For a block of user memory with the EBTRn
bit cleared to ‘0’, a table READ instruction that executes
from within that block is allowed to read. A table read
FIGURE 24-3:
 2010 Microchip Technology Inc.
Results: All table writes disabled to Blockn whenever WRTn = 0
TBLPTR = 0008FFh
Register Values
PROGRAM MEMORY
CODE PROTECTION
PC = 001FFEh
PC = 005FFEh
TABLE WRITE (WRTn) DISALLOWED
Program Memory
Preliminary
TBLWT*
TBLWT*
instruction that executes from a location outside of that
block is not allowed to read and will result in reading ‘0’s.
Figures
read protection.
Note:
PIC18(L)F2X/4XK22
000000h
0007FFh
000800h
001FFFh
002000h
003FFFh
004000h
005FFFh
006000h
007FFFh
.
24-3
Code protection bits may only be written
to a ‘0’ from a ‘1’ state. It is not possible to
write a ‘1’ to a bit in the ‘0’ state. Code pro-
tection bits are only set to ‘1’ by a full chip
erase or block erase function. The full chip
erase and block erase functions can only
be initiated via ICSP™ or an external
programmer.
through
Configuration Bit Settings
24-5
WRTB, EBTRB = 11
WRT0, EBTR0 = 01
WRT1, EBTR1 = 11
WRT2, EBTR2 = 11
WRT3, EBTR3 = 11
illustrate table write and table
DS41412D-page 363