pic24hj12gp202 Microchip Technology Inc., pic24hj12gp202 Datasheet - Page 45

• Manufacturer Part Number: pic24hj12gp202
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

5.0
The Reset module combines all Reset sources and
controls the device Master Reset Signal, SYSRST. The
following is a list of device Reset sources:
• POR: Power-on Reset
• BOR: Brown-out Reset
• MCLR: Master Clear Pin Reset
• SWR: RESET Instruction
• WDTO: Watchdog Timer Reset
• TRAPR: Trap Conflict Reset
• IOPUWR: Illegal Opcode, Uninitialized W
• CM: Configuration Mismatch Reset
A simplified block diagram of the Reset module is
shown in Figure 5-1.
FIGURE 5-1:
© 2007 Microchip Technology Inc.
Note:
Register Reset, and Security Reset
RESETS
This data sheet summarizes the features
of the PIC24HJ12GP201/202 devices. It is
not intended to be a comprehensive
reference source. To complement the
information in this data sheet, refer to the
“PIC24H
Please see the Microchip web site
(www.microchip.com)
PIC24H
chapters.
MCLR
V
DD
Uninitialized W Register
Configuration Mismatch
RESET SYSTEM BLOCK DIAGRAM
Family
Family
RESET Instruction
Sleep or Idle
Module
Illegal Opcode
WDT
V
Trap Conflict
Reference
Regulator
Reference
Detect
DD
Internal
Rise
for
the
Glitch Filter
Manual”.
Manual
POR
BOR
latest
Preliminary
PIC24HJ12GP201/202
Any active source of Reset makes the SYSRST signal
active. Many registers associated with the CPU and
peripherals are forced to a known Reset state. Most
registers are unaffected by a Reset; their status is
unknown on POR and unchanged by all other Resets.
All types of device Reset will set a corresponding status
bit in the RCON register to indicate the type of Reset
(see Register 5-1). A POR will clear all bits, except for
the POR bit (RCON<0>), that are set. The user
application can set or clear any bit at any time during
code execution. The RCON bits only serve as status
bits. Setting a particular Reset status bit in software
does not cause a device Reset to occur.
The RCON register also has other bits associated with
the Watchdog Timer and device power-saving states.
The function of these bits is discussed in other sections
of this manual.
Note:
Note:
Refer to the specific peripheral or CPU
section of this manual for register Reset
states.
The status bits in the RCON register
should be cleared after they are read so
that the next RCON register value after a
device Reset will be meaningful.
SYSRST
DS70282B-page 43