PIC18F6621-I/PT Microchip Technology Inc., PIC18F6621-I/PT Datasheet - Page 144

• 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
13.2
The Timer2 module has an 8-bit period register, PR2.
Timer2 increments from 00h until it matches PR2 and
then resets to 00h on the next increment cycle. PR2 is
a readable and writable register. The PR2 register is
initialized to FFh upon Reset.
FIGURE 13-1:
TABLE 13-1:
DS39612B-page 142
INTCON GIE/GIEH PEIE/GIEL
PIR1
PIE1
IPR1
TMR2
T2CON
PR2
Legend:
Note 1:
Name
Timer2 Interrupt
Timer2 Module Register
Timer2 Period Register
PSPIE
PSPIP
PSPIF
Note 1: TMR2 register output can be software selected by the MSSP module as a baud clock.
x = unknown, u = unchanged, — = unimplemented, read as ‘0’. Shaded cells are not used by the Timer2 module.
Enabled only in Microcontroller mode for PIC18F8525/8621 devices.
Bit 7
F
—
OSC
(1)
(1)
(1)
/4
REGISTERS ASSOCIATED WITH TIMER2 AS A TIMER/COUNTER
T2OUTPS3 T2OUTPS2 T2OUTPS1 T2OUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 -000 0000
ADIE
ADIP
ADIF
TIMER2 BLOCK DIAGRAM
Bit 6
T2CKPS1:T2CKPS0
1:1, 1:4, 1:16
Prescaler
TMR0IE
RC1IF
RC1IE
RC1IP
Bit 5
2
INT0IE
TX1IF
TX1IE
TX1IP
Bit 4
Comparator
TMR2
PR2
SSPIF
SSPIE
SSPIP
RBIE
Bit 3
13.3
The output of TMR2 (before the postscaler) is fed to the
synchronous serial port module which optionally uses it
to generate the shift clock.
EQ
Reset
T2OUTPS3:T2OUTPS0
TMR0IF
CCP1IE
CCP1IP
CCP1IF
Bit 2
Postscaler
1:1 to 1:16
Output of TMR2
Output
TMR2IF
TMR2IE
TMR2IP
TMR2
INT0IF
4
Bit 1
(1)
TMR1IF 0000 0000 0000 0000
TMR1IE 0000 0000 0000 0000
TMR1IP 1111 1111 1111 1111
RBIF
Bit 0
 2005 Microchip Technology Inc.
bit TMR2IF
0000 000x 0000 000u
0000 0000 0000 0000
1111 1111 1111 1111
Sets Flag
POR, BOR
Value on
Value on
all other
Resets