PIC18F4585-H/P Microchip Technology, PIC18F4585-H/P Datasheet - Page 43
![no-image](/images/manufacturer_photos/0/4/439/microchip_technology_sml.jpg)
PIC18F4585-H/P
Manufacturer Part Number
PIC18F4585-H/P
Description
IC MCU 8BIT 48KB FLASH 40PDIP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheet
1.PIC18F4585-IPT.pdf
(482 pages)
Specifications of PIC18F4585-H/P
Core Processor
PIC
Core Size
8-Bit
Speed
25MHz
Connectivity
CAN, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, HLVD, POR, PWM, WDT
Number Of I /o
36
Program Memory Size
48KB (24K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
3.25K x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 11x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 150°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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4.0
The PIC18F2585/2680/4585/4680 devices differentiate
between various kinds of Reset:
a)
b)
c)
d)
e)
f)
g)
h)
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 5.1.2.4 “Stack Full and Underflow Resets”.
WDT Resets are covered in Section 24.2 “Watchdog
Timer (WDT)”.
FIGURE 4-1:
© 2007 Microchip Technology Inc.
OSC1
MCLR
V
Note 1: This is the INTRC source from the internal oscillator block and is separate from the RC oscillator of the CLKI pin.
Power-on Reset (POR)
MCLR Reset during normal operation
MCLR Reset during power managed modes
Watchdog Timer (WDT) Reset (during
execution)
Programmable Brown-out Reset (BOR)
RESET Instruction
Stack Full Reset
Stack Underflow Reset
DD
RESET
2: See Table 4-2 for time-out situations.
Instruction
INTRC
RESET
OST/PWRT
Pointer
32 μs
Stack
Brown-out
( )_IDLE
Time-out
V
(1)
Detect
Sleep
DD
WDT
Reset
Rise
OST
PWRT
Stack Full/Underflow Reset
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
External Reset
MCLRE
10-bit Ripple Counter
11-bit Ripple Counter
POR Pulse
BOREN
1024 Cycles
65.5 ms
PIC18F2585/2680/4585/4680
Preliminary
A simplified block diagram of the On-Chip Reset Circuit
is shown in Figure 4-1.
4.1
Device Reset events are tracked through the RCON
register (Register 4-1). The lower five bits of the
register indicate that a specific Reset event has
occurred. In most cases, these bits can only be cleared
by the event and must be set 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 4.6 “Reset State of Registers”.
The RCON register also has control bits for setting
interrupt priority (IPEN) and software control of the
BOR (SBOREN). Interrupt priority is discussed in
Section 9.0
Section 4.4 “Brown-out Reset (BOR)”.
RCON Register
“Interrupts”.
S
R
BOR
DS39625C-page 41
Q
is
Enable OST
Enable PWRT
Chip_Reset
covered
(2)
in
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