Microchip Technology DM164134 Data Sheet
© 2006 Microchip Technology Inc.
DS41159E-page 7
PIC18FXX8
1.0
DEVICE OVERVIEW
This document contains device specific information for
the following devices:
the following devices:
• PIC18F248
• PIC18F258
• PIC18F448
• PIC18F458
These devices are available in 28-pin, 40-pin and
44-pin packages. They are differentiated from each
other in four ways:
44-pin packages. They are differentiated from each
other in four ways:
1.
PIC18FX58 devices have twice the Flash
program memory and data RAM of PIC18FX48
devices (32 Kbytes and 1536 bytes vs.
16 Kbytes and 768 bytes, respectively).
program memory and data RAM of PIC18FX48
devices (32 Kbytes and 1536 bytes vs.
16 Kbytes and 768 bytes, respectively).
2.
PIC18F2X8 devices implement 5 A/D channels,
as opposed to 8 for PIC18F4X8 devices.
as opposed to 8 for PIC18F4X8 devices.
3.
PIC18F2X8 devices implement 3 I/O ports,
while PIC18F4X8 devices implement 5.
while PIC18F4X8 devices implement 5.
4.
Only PIC18F4X8 devices implement the
Enhanced CCP module, analog comparators
and the Parallel Slave Port.
Enhanced CCP module, analog comparators
and the Parallel Slave Port.
All other features for devices in the PIC18FXX8 family,
including the serial communications modules, are
identical. These are summarized in Table 1-1.
including the serial communications modules, are
identical. These are summarized in Table 1-1.
Block diagrams of the PIC18F2X8 and PIC18F4X8
devices are provided in Figure 1-1 and Figure 1-2,
respectively. The pinouts for these device families are
listed in Table 1-2.
devices are provided in Figure 1-1 and Figure 1-2,
respectively. The pinouts for these device families are
listed in Table 1-2.
TABLE 1-1:
PIC18FXX8 DEVICE FEATURES
Features
PIC18F248
PIC18F258
PIC18F448
PIC18F458
Operating Frequency
DC – 40 MHz
DC – 40 MHz
DC – 40 MHz
DC – 40 MHz
Internal
Program
Memory
Program
Memory
Bytes
16K
32K
16K
32K
# of Single-Word
Instructions
Instructions
8192
16384
8192
16384
Data Memory (Bytes)
768
1536
768
1536
Data EEPROM Memory (Bytes)
256
256
256
256
Interrupt Sources
17
17
21
21
I/O Ports
Ports A, B, C
Ports A, B, C
Ports A, B, C, D, E
Ports A, B, C, D, E
Timers
4
4
4
4
Capture/Compare/PWM Modules
1
1
1
1
Enhanced Capture/Compare/
PWM Modules
PWM Modules
—
—
1
1
Serial Communications
MSSP, CAN,
Addressable USART
MSSP, CAN,
Addressable USART
MSSP, CAN,
Addressable USART
MSSP, CAN,
Addressable USART
Parallel Communications (PSP)
No
No
Yes
Yes
10-bit Analog-to-Digital Converter
5 input channels
5 input channels
8 input channels
8 input channels
Analog Comparators
No
No
2
2
Analog Comparators V
REF
Output
N/A
N/A
Yes
Yes
Resets (and Delays)
POR, BOR,
RESET
Instruction,
Stack Full,
Stack Underflow
(PWRT, OST)
POR, BOR,
RESET
Instruction,
Stack Full,
Stack Underflow
(PWRT, OST)
POR, BOR,
RESET
Instruction,
Stack Full,
Stack Underflow
(PWRT, OST)
POR, BOR,
RESET
Instruction,
Stack Full,
Stack Underflow
(PWRT, OST)
Programmable Low-Voltage Detect
Yes
Yes
Yes
Yes
Programmable Brown-out Reset
Yes
Yes
Yes
Yes
CAN Module
Yes
Yes
Yes
Yes
In-Circuit Serial Programming™
(ICSP™)
(ICSP™)
Yes
Yes
Yes
Yes
Instruction Set
75 Instructions
75 Instructions
75 Instructions
75 Instructions
Packages
28-pin SPDIP
28-pin SOIC
28-pin SPDIP
28-pin SOIC
40-pin PDIP
44-pin PLCC
44-pin TQFP
44-pin TQFP
40-pin PDIP
44-pin PLCC
44-pin TQFP
44-pin TQFP