PCM18XK1 Microchip Technology, PCM18XK1 Datasheet - Page 364

• Manufacturer Part Number: PCM18XK1
• Description: MODULE PROC PIC18F8680,6680,8565
• Manufacturer: Microchip Technology

Specifications of PCM18XK1

• Accessory Type: Processor Module
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: ICE2000
• For Use With: ICE2000 - EMULATOR MPLAB-ICE 2000 POD
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC18F6585/8585/6680/8680
24.4.2
The entire data EEPROM is protected from external
reads and writes by two bits: CPD and WRTD. CPD
inhibits external reads and writes of data EEPROM.
WRTD inhibits external writes to data EEPROM. The
CPU can continue to read and write data EEPROM
regardless of the protection bit settings.
24.4.3
The Configuration registers can be write-protected. The
WRTC bit controls protection of the Configuration regis-
ters. In User mode, the WRTC bit is readable only. WRTC
can only be written via ICSP or an external programmer.
24.5
Eight memory locations (200000h-200007h) are
designated as ID locations where the user can store
checksum or other code identification numbers. These
locations are accessible during normal execution
through the TBLRD and TBLWT instructions or during
program/verify. The ID locations can be read when the
device is code-protected.
24.6
PIC18FXX80/XX85 microcontrollers can be serially
programmed while in the end application circuit. This is
simply done with two lines for clock and data, and three
other lines for power, ground and the programming
voltage. This allows customers to manufacture boards
with unprogrammed devices and then program the
microcontroller just before shipping the product. This
also allows the most recent firmware or a custom
firmware to be programmed.
DS30491C-page 362
ID Locations
In-Circuit Serial Programming
DATA EEPROM CODE
PROTECTION
CONFIGURATION REGISTER
PROTECTION
24.7
When the DEBUG bit in Configuration register,
CONFIG4L, is programmed to a ‘0’, the in-circuit
debugger functionality is enabled. This function allows
simple debugging functions when used with MPLAB
IDE. When the microcontroller has this feature
enabled, some of the resources are not available for
general use. Table 24-4 shows which features are
consumed by the background debugger.
TABLE 24-4:
To use the in-circuit debugger function of the micro-
controller, the design must implement In-Circuit Serial
Programming connections to MCLR/V
RB7 and RB6. This will interface to the in-circuit
debugger module available from Microchip or one of
the third party development tool companies.
Stack
Program Memory
Data Memory
I/O pins
In-Circuit Debugger
DEBUGGER RESOURCES
 2004 Microchip Technology Inc.
RB6, RB7
512 bytes
10 bytes
2 levels
PP
, V
DD
, GND,
®