PIC18F4550-I/PT Microchip Technology Inc., PIC18F4550-I/PT Datasheet - Page 270

• Manufacturer Part Number: PIC18F4550-I/PT
• Description: 44 PIN, 32 KB FLASH, 2048 RAM, FS-USB 2.0
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F4550-I/PT

• A/d Inputs: 13-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 12 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 34
• Interface: I2C/SPI/UART/USART/USB
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 44-pin TQFP
• Programmable Memory: 32K Bytes
• Ram Size: 2K Bytes
• Speed: 48 MHz
• Timers: 1-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC18F2455/2550/4455/4550
21.8
An A/D conversion can be started by the Special Event
Trigger of the CCP2 module. This requires that the
CCP2M3:CCP2M0 bits (CCP2CON<3:0>) be pro-
grammed as ‘1011’ and that the A/D module is enabled
(ADON bit is set). When the trigger occurs, the
GO/DONE bit will be set, starting the A/D acquisition
and conversion and the Timer1 (or Timer3) counter will
be reset to zero. Timer1 (or Timer3) is reset to automat-
ically repeat the A/D acquisition period with minimal
software overhead (moving ADRESH:ADRESL to the
TABLE 21-2:
DS39632C-page 268
INTCON
PIR1
PIE1
IPR1
PIR2
PIE2
IPR2
ADRESH
ADRESL
ADCON0
ADCON1
ADCON2
PORTA
TRISA
PORTB
TRISB
LATB
PORTE
TRISE
LATE
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used for A/D conversion.
Note 1:
Name
(4)
2:
3:
4:
(4)
Use of the CCP2 Trigger
Implemented only when Master Clear functionality is disabled (MCLRE Configuration bit = 0).
RA6 and its associated latch and data direction bits are enabled as I/O pins based on oscillator
configuration; otherwise, they are read as ‘0’.
RE3 port bit is available only as an input pin when the MCLRE Configuration bit is ‘0’.
These registers and/or bits are not implemented on 28-pin devices.
A/D Result Register High Byte
GIE/GIEH PEIE/GIEL TMR0IE
A/D Result Register Low Byte
SPPIF
SPPIE
SPPIP
RDPU
OSCFIE
OSCFIP
OSCFIF
TRISB7
LATB7
ADFM
Bit 7
RB7
—
—
—
—
—
—
REGISTERS ASSOCIATED WITH A/D OPERATION
(4)
(4)
(4)
(4)
TRISA6
TRISB6
LATB6
RA6
CMIF
CMIE
CMIP
ADIE
ADIP
ADIF
Bit 6
RB6
—
—
—
—
—
—
(2)
(2)
TRISA5
TRISB5
VCFG1
ACQT2
USBIF
USBIE
USBIP
LATB5
CHS3
RCIE
RCIP
RCIF
Bit 5
RA5
RB5
—
—
—
TRISA4
TRISB4
VCFG0
ACQT1
INT0IE
LATB4
Preliminary
CHS2
TXIE
TXIP
EEIF
EEIE
EEIP
Bit 4
TXIF
RA4
RB4
—
—
—
TRISA3
TRISB3
RE3
PCFG3
ACQT0
SSPIE
SSPIP
LATB3
SSPIF
BCLIF
BCLIE
BCLIP
CHS1
desired location). The appropriate analog input chan-
nel must be selected and the minimum acquisition
period is either timed by the user, or an appropriate
T
sets the GO/DONE bit (starts a conversion).
If the A/D module is not enabled (ADON is cleared), the
Special Event Trigger will be ignored by the A/D
module but will still reset the Timer1 (or Timer3)
counter.
RBIE
Bit 3
RA3
RB3
ACQ
—
—
(1,3)
time selected before the Special Event Trigger
TMR0IF
CCP1IF
CCP1IE
CCP1IP
HLVDIF
HLVDIE
HLVDIP
TRISA2
TRISB2
TRISE2
PCFG2
ADCS2
LATB2
RE2
LATE2
CHS0
Bit 2
RA2
RB2
(4)
GO/DONE
TMR2IF
TMR2IE
TMR2IP
TMR3IF
TMR3IE
TMR3IP
TRISA1
TRISB1
TRISE1
PCFG1
ADCS1
INT0IF
LATB1
RE1
LATE1
Bit 1
© 2006 Microchip Technology Inc.
RA1
RB1
(4)
TMR1IF
TMR1IE
TMR1IP
CCP2IE
CCP2IP
CCP2IF
TRISA0
TRISB0
TRISE0
PCFG0
ADCS0
LATB0
RE0
LATE0
ADON
RBIF
Bit 0
RA0
RB0
(4)
on page
Values
Reset
51
54
54
54
54
54
54
52
52
52
52
52
54
54
54
54
54
54
54
54