PIC18F1220-H/ML Microchip Technology, PIC18F1220-H/ML Datasheet - Page 115
![no-image](/images/manufacturer_photos/0/4/439/microchip_technology_sml.jpg)
PIC18F1220-H/ML
Manufacturer Part Number
PIC18F1220-H/ML
Description
IC MCU 8BIT 4KB FLASH 28QFN
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheet
1.PIC18F1220-ISO.pdf
(308 pages)
Specifications of PIC18F1220-H/ML
Core Processor
PIC
Core Size
8-Bit
Speed
25MHz
Connectivity
UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
16
Program Memory Size
4KB (2K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 7x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 150°C
Package / Case
28-VQFN Exposed Pad
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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14.2
The Timer1 oscillator may be used as the clock source
for Timer3. The Timer1 oscillator is enabled by setting
the T1OSCEN (T1CON<3>) bit. The oscillator is a low-
power oscillator rated for 32 kHz crystals. See
Section 12.2 “Timer1 Oscillator” for further details.
14.3
The TMR3 register pair (TMR3H:TMR3L) increments
from 0000h to FFFFh and rolls over to 0000h. The
TMR3 interrupt, if enabled, is generated on overflow,
which is latched in interrupt flag bit, TMR3IF
(PIR2<1>). This interrupt can be enabled/disabled by
setting/clearing TMR3 Interrupt Enable bit, TMR3IE
(PIE2<1>).
TABLE 14-1:
© 2007 Microchip Technology Inc.
INTCON
PIR2
PIE2
IPR2
TMR3L
TMR3H
T1CON
T3CON
Legend:
Name
Timer1 Oscillator
Timer3 Interrupt
Holding Register for the Least Significant Byte of the 16-bit TMR3 Register
Holding Register for the Most Significant Byte of the 16-bit TMR3 Register
OSCFIF
OSCFIE
OSCFIP
x = unknown, u = unchanged, – = unimplemented, read as ‘0’. Shaded cells are not used by the Timer3 module.
RD16
RD16
GIEH
Bit 7
GIE/
REGISTERS ASSOCIATED WITH TIMER3 AS A TIMER/COUNTER
T1RUN
PEIE/
GIEL
Bit 6
—
—
—
—
T1CKPS1 T1CKPS0 T1OSCEN T1SYNC
T3CKPS1 T3CKPS0
TMR0IE
Bit 5
—
—
—
INT0IE
EEIE
EEIP
Bit 4
EEIF
T3CCP1
RBIE
Bit 3
—
—
—
T3SYNC
TMR0IF
14.4
If the CCP module is configured in Compare mode
to
(CCP1M3:CCP1M0 = 1011), this signal will reset
Timer3. See Section 15.4.4 “Special Event Trigger”
for more information.
Timer3 must be configured for either Timer or Synchro-
nized Counter mode to take advantage of this feature.
If Timer3 is running in Asynchronous Counter mode,
this Reset operation may not work. In the event that a
write to Timer3 coincides with a special event trigger
from CCP1, the write will take precedence. In this mode
of operation, the CCPR1H:CCPR1L register pair
effectively becomes the period register for Timer3.
LVDIE
LVDIP
LVDIF
Bit 2
Note:
generate
Resetting Timer3 Using a CCP
Trigger Output
PIC18F1220/1320
TMR1CS TMR1ON 0000 0000 u0uu uuuu
TMR3CS TMR3ON 0-00 0000 u-uu uuuu
TMR3IF
TMR3IE
TMR3IP
INT0IF
Bit 1
The special event triggers from the CCP
module will not set interrupt flag bit,
TMR3IF (PIR1<0>).
a
RBIF
Bit 0
—
—
—
“special
0000 000x 0000 000u
0--0 -00- 0--0 -00-
0--0 -00- 0--0 -00-
1--1 -11- 1--1 -11-
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
POR, BOR
Value on
DS39605F-page 113
event
Value on
all other
Resets
trigger”
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