PIC18F458-I/PTG Microchip Technology, PIC18F458-I/PTG Datasheet - Page 231
PIC18F458-I/PTG
Manufacturer Part Number
PIC18F458-I/PTG
Description
IC MCU FLASH 16KX16 44TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC18LF242-ISO.pdf
(36 pages)
3.PIC18F248-ISO.pdf
(402 pages)
4.PIC18F248-ISO.pdf
(8 pages)
Specifications of PIC18F458-I/PTG
Core Processor
PIC
Core Size
8-Bit
Speed
40MHz
Connectivity
CAN, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
33
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- PIC16F616T-ISL PDF datasheet
- PIC18LF242-ISO PDF datasheet #2
- PIC18F248-ISO PDF datasheet #3
- PIC18F248-ISO PDF datasheet #4
- Current page: 231 of 402
- Download datasheet (7Mb)
FIGURE 19-3:
© 2006 Microchip Technology Inc.
The TXIE bit determines if an inter-
rupt should be generated when a
message is successfully transmitted.
Generate
Interrupt
INTERNAL TRANSMIT MESSAGE FLOWCHART
Determine Highest Priority Message
No
Yes
Begin Transmission (SOF)
Examine TXPRI <1:0> to
Clear: TXABT, TXLARB
Message Transmitted
Available to Start
Transmission?
Set TXREQ = 0
Successfully?
TXBUFE = 1
and TXERR
Is CAN bus
TXIE = 1?
TXREQ
bits = 1?
Are any
Start
END
Was
Set
Is
Yes
Yes
Yes
No
A message can also be
aborted if a message
error or lost arbitration
condition occurred during
transmission.
No
No
The message transmission sequence begins when
the device determines that the TXREQ for any of the
transmit registers has been set.
Clearing the TXREQ bit while it is set, or setting
the ABAT bit before the message has started
transmission, will abort the message.
or TXABT = 1?
TXLARB = 1?
TXREQ = 0
ABAT = 1?
TXERR = 1
TXREQ = 0
No
No
Set
Is
Is
Is
No
Yes
Yes
Yes
Abort Transmission:
Set TXABT = 1
PIC18FXX8
Arbitration Lost During
Transmission
DS41159E-page 229
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