Datasheet

 2013 Microchip Technology Inc. DS22331A-page 19
MCP19111
3.8.5 OVERTEMPERATURE
The MCP19111 features a hardware overtemperature
shutdown protection typically set at +160°C. No
firmware fault-handling procedure is required to
shutdown the MCP19111 for an overtemperature
condition.
3.9 PIC Microcontroller Core
Integrated into the MCP19111 is the PIC
microcontroller mid-range core. This is a fully functional
microcontroller, allowing proprietary features to be
implemented. Setting the CONFIG<CP> bit enables
the code protection. The firmware is then protected
from external reads or writes. Various status and fault
bits are available to customize the fault handling
response.
A minimal amount of firmware is required to properly
configure the MCP19111. Section 6.0 “Configuring
the MCP19111” contains detailed information about
each register that needs to be set for the MCP19111
device to operate. To aid in the development of the
required firmware, a Graphical User Interface (GUI)
has been developed. This GUI can be used to quickly
configure the MCP19111 for basic operation.
Customized or proprietary features can then be added
to the GUI generated firmware.
The MCP19111 device features firmware debug
support. See Section 30.0 “Development Support”
for more information.
3.10 Miscellaneous Features
3.10.1 DEVICE ADDRESSING
The communication address of the MCP19111 is
stored in the SSPADD register. This value can be
loaded when the device firmware is programmed or
configured by external components. By reading a volt-
age on a GPIO with the ADC, a device specific address
can be stored into the SSPADD register.
The MCP19111 contains a second address register,
SSPADD2. This is a 7-bit address that can be used as
the SMBus alert address when PMBus communication
is used. See Section 27.0 “Master Synchronous
Serial Port (MSSP) Module” for more information.
3.10.2 DEVICE ENABLE
A GPIO pin can be configured to be a device enable
pin. By configuring the pin as an input, the PORT
register or the interrupt on change (IOC) can be used
to enable the device. Example 3-2 shows how to
configure a GPIO as an enable pin by testing the PORT
register.
EXAMPLE 3-2: CONFIGURING GPA3 AS DEVICE ENABLE
Note 1: The GUI can be found on the MCP19111
product page on www.microchip.com.
2: Microchip's MPLAB X Integrated
Development Environment Software is
required to use the GUI.
BANKSEL TRISGPA
BSF TRISGPA, 3 ;Set GPA3 as input
BANKSEL ANSELA
BCF ANSELA, 3 ;Set GPA3 as digital input
:
: ;Insert additional user code here
:
WAIT_ENABLE:
BANKSEL PORTGPA
BTFSS PORTGPA, 3 ;Test GPA3 to see if pulled high
;A high on GPA3 indicated device to be enabled
GOTO WAIT_ENABLE ;Stay in loop waiting for device enable
BANKSEL ATSTCON
BSF ATSTCON, 0 ;Enable the device by enabling drivers
:
: ;Insert additional code here
: