PIC18F66K22-I/PT Microchip Technology, PIC18F66K22-I/PT Datasheet - Page 207
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PIC18F66K22-I/PT
Manufacturer Part Number
PIC18F66K22-I/PT
Description
64kB Flash, 4kB RAM, 1kB EE, NanoWatt XLP, GP 64 TQFP 10x10x1mm TRAY
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheets
1.PIC18F66K22-IPT.pdf
(548 pages)
2.PIC18F66K22-IPT.pdf
(548 pages)
3.PIC18F66K22-IPT.pdf
(8 pages)
Specifications of PIC18F66K22-I/PT
Core Processor
PIC
Core Size
8-Bit
Speed
64MHz
Connectivity
I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
64KB (32K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 16x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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15.0
The Timer2 module incorporates the following features:
• Eight-bit Timer and Period registers (TMR2 and
• Both registers readable and writable
• Software programmable prescaler
• Software programmable postscaler
• Interrupt on TMR2 to PR2 match
• Optional use as the shift clock for the
The module is controlled through the T2CON register
(Register 15-1) that enables or disables the timer, and
configures the prescaler and postscaler. Timer2 can be
shut off by clearing control bit, TMR2ON (T2CON<2>),
to minimize power consumption.
A simplified block diagram of the module is shown in
Figure 15-1.
15.1
In normal operation, TMR2 is incremented from 00h on
each clock (F
clock input gives the prescale options of direct input,
divide-by-4 or divide-by-16. These are selected by the
prescaler control bits, T2CKPS<1:0> (T2CON<1:0>).
REGISTER 15-1:
2010 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6-3
bit 2
bit 1-0
PR2, respectively)
(1:1, 1:4 and 1:16)
(1:1 through 1:16)
MSSP modules
U-0
—
TIMER2 MODULE
Timer2 Operation
OSC
Unimplemented: Read as ‘0’
T2OUTPS<3:0>: Timer2 Output Postscale Select bits
0000 = 1:1 Postscale
0001 = 1:2 Postscale
•
•
•
1111 = 1:16 Postscale
TMR2ON: Timer2 On bit
1 = Timer2 is on
0 = Timer2 is off
T2CKPS<1:0>: Timer2 Clock Prescale Select bits
00 = Prescaler is 1
01 = Prescaler is 4
1x = Prescaler is 16
T2OUTPS3
/4). A four-bit counter/prescaler on the
R/W-0
T2CON: TIMER2 CONTROL REGISTER
W = Writable bit
‘1’ = Bit is set
T2OUTPS2
R/W-0
T2OUTPS1
R/W-0
Preliminary
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
PIC18F87K22 FAMILY
T2OUTPS0
R/W-0
The value of TMR2 is compared to that of the Period reg-
ister, PR2, on each clock cycle. When the two values
match, the comparator generates a match signal as the
timer output. This signal also resets the value of TMR2
to 00h on the next cycle and drives the output counter/
postscaler. (See Section 15.2 “Timer2 Interrupt”.)
The TMR2 and PR2 registers are both directly readable
and writable. The TMR2 register is cleared on any
device Reset, while the PR2 register initializes at FFh.
Both the prescaler and postscaler counters are cleared
on the following events:
• A write to the TMR2 register
• A write to the T2CON register
• Any device Reset – Power-on Reset (POR),
TMR2 is not cleared when T2CON is written.
MCLR Reset, Watchdog Timer Reset (WDTR) or
Brown-out Reset (BOR)
Note:
The CCP and ECCP modules use Timers,
1 through 8, for some modes. The assign-
ment of a particular timer to a CCP/ECCP
module is determined by the Timer to CCP
enable bits in the CCPTMRSx registers.
For more details, see Register 20-2,
Register 19-2 and Register 19-3.
TMR2ON
R/W-0
x = Bit is unknown
T2CKPS1
R/W-0
DS39960B-page 207
T2CKPS0
R/W-0
bit 0
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