PIC18F6621-I/PT Microchip Technology Inc., PIC18F6621-I/PT Datasheet - Page 224

• Manufacturer Part Number: PIC18F6621-I/PT
• Description: 64 PIN, 64 KB FLASH, 3840 RAM, 52 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F6621-I/PT

• A/d Inputs: 12-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 1024 Bytes
• Input Output: 54
• Interface: I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 64-pin TQFP
• Programmable Memory: 64K Bytes
• Ram Size: 3.8K Bytes
• Speed: 40 MHz
• Timers: 2-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC18F6525/6621/8525/8621
FIGURE 19-3:
FIGURE 19-4:
TABLE 19-5:
DS39612B-page 222
INTCON
PIR1
PIE1
IPR1
PIR3
PIE3
IPR3
RCSTAx
TXREGx
TXSTAx
BAUDCONx
SPBRGHx
SPBRGx
Legend:
Note 1:
(Interrupt Reg. Flag)
Note:
Reg. Empty Flag)
Reg. Empty Flag)
Write to TXREGx
Name
Reg. Empty Flag)
Write to TXREGx
(Transmit Buffer
(Transmit Shift
(Transmit Shift
BRG Output
(Shift Clock)
BRG Output
(Shift Clock)
TRMT bit
TXxIF bit
TRMT bit
TXxIF bit
This timing diagram shows two consecutive transmissions.
x = unknown, – = unimplemented locations read as ‘0’. Shaded cells are not used for asynchronous transmission.
Enabled only in Microcontroller mode for PIC18F8525/8621 devices.
Enhanced USARTx Transmit Register
Enhanced USARTx Baud Rate Generator Register High Byte
Enhanced USARTx Baud Rate Generator Register Low Byte
(pin)
TXx
(pin)
GIE/GIEH
TXx
PSPIF
PSPIE
PSPIP
CSRC
SPEN
Bit 7
—
—
—
—
REGISTERS ASSOCIATED WITH ASYNCHRONOUS TRANSMISSION
(1)
(1)
(1)
ASYNCHRONOUS TRANSMISSION
ASYNCHRONOUS TRANSMISSION (BACK TO BACK)
1 T
Word 1
Transmit Shift Reg
CY
PEIE/GIEL TMR0IE INT0IE
Word 1
Transmit Shift Reg.
Word 1
Word 1
RCIDL
ADIF
ADIE
ADIP
Bit 6
RX9
TX9
—
—
—
1 T
CY
Start bit
Start bit
Word 2
RC1IE
RC1IP
RC2IE
RC2IP
RC1IF
RC2IF
SREN
TXEN
Bit 5
—
1 T
CREN
TX1IF
TX1IE
TX1IP
TX2IF
TX2IE
TX2IP
SYNC
SCKP
Bit 4
CY
bit 0
bit 0
TMR4IE CCP5IE
TMR4IP CCP5IP
TMR4IF CCP5IF
ADDEN
SENDB
BRG16
SSPIE
SSPIP
SSPIF
RBIE
Bit 3
bit 1
Word 1
bit 1
Word 1
TMR0IF
CCP1IF
CCP1IE
CCP1IP
BRGH
FERR
Bit 2
—
TMR2IE
TMR2IP
TMR2IF
CCP4IF
CCP4IE
CCP4IP
INT0IF
OERR
TRMT
WUE
Bit 1
bit 7/8
bit 7/8
TMR1IF
TMR1IE
TMR1IP
CCP3IF
CCP3IE
CCP3IP
ABDEN
RX9D
TX9D
Bit 0
RBIF
Word 2
Transmit Shift Reg.
 2005 Microchip Technology Inc.
Stop bit
Stop bit
0000 000x 0000 000u
0000 0000 0000 0000
0000 0000 0000 0000
1111 1111 1111 1111
--00 0000 --00 0000
--00 0000 --00 0000
--11 1111 --11 1111
0000 000x 0000 000x
0000 0000 0000 0000
0000 0010 0000 0010
-1-0 0-00 -1-0 0-00
0000 0000 0000 0000
0000 0000 0000 0000
POR, BOR
Value on
Start bit
Word 2
Value on
all other
Resets
bit 0