PIC18F66K22-I/PT Microchip Technology, PIC18F66K22-I/PT Datasheet - Page 71
PIC18F66K22-I/PT
Manufacturer Part Number
PIC18F66K22-I/PT
Description
64kB Flash, 4kB RAM, 1kB EE, NanoWatt XLP, GP 64 TQFP 10x10x1mm TRAY
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheets
1.PIC18F66K22-IPT.pdf
(548 pages)
2.PIC18F66K22-IPT.pdf
(548 pages)
3.PIC18F66K22-IPT.pdf
(8 pages)
Specifications of PIC18F66K22-I/PT
Core Processor
PIC
Core Size
8-Bit
Speed
64MHz
Connectivity
I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
64KB (32K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 16x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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5.0
The PIC18F87K22 family of devices differentiates
between various kinds of Reset:
a)
b)
c)
d)
e)
f)
g)
h)
i)
This section discusses Resets generated by MCLR,
POR and BOR, and covers the operation of the various
start-up timers. Stack Reset events are covered in
Section 6.1.3.4 “Stack Full and Underflow Resets”.
WDT Resets are covered in Section 28.2 “Watchdog
Timer (WDT)”.
A simplified block diagram of the on-chip Reset circuit
is shown in Figure 5-1.
FIGURE 5-1:
2010 Microchip Technology Inc.
MCLR
Power-on Reset (POR)
MCLR Reset during normal operation
MCLR Reset during power-managed modes
Watchdog Timer (WDT) Reset (during
execution)
Configuration Mismatch (CM) Reset
Brown-out Reset (BOR)
RESET Instruction
Stack Full Reset
Stack Underflow Reset
V
DD
RESET
Configuration Word Mismatch
PWRT
Pointer
Stack
LF-INTOSC
( )_IDLE
V
Brown-out
32 s
Time-out
DD
Detect
WDT
Reset
Sleep
Rise
External Reset
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
Stack Full/Underflow Reset
RESET Instruction
POR Pulse
PWRT
11-Bit Ripple Counter
66 ms
Preliminary
PIC18F87K22 FAMILY
5.1
Device Reset events are tracked through the RCON
register (Register 5-1). The lower five bits of the
register indicate that a specific Reset event has
occurred. In most cases, these bits can only be set by
the event and must be cleared by the application after
the event.
The state of these flag bits, taken together, can be read
to indicate the type of Reset that just occurred. This is
described in more detail in Section 5.7 “Reset State
of Registers”.
The RCON register also has a control bit for setting
interrupt priority (IPEN). Interrupt priority is discussed
in Section 11.0 “Interrupts”.
RCON Register
S
R
Q
DS39960B-page 71
Chip_Reset
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