PIC16F723A-I/SS Microchip Technology, PIC16F723A-I/SS Datasheet - Page 100
PIC16F723A-I/SS
Manufacturer Part Number
PIC16F723A-I/SS
Description
MCU PIC 3.5K FLASH XLP 28-SSOP
Manufacturer
Microchip Technology
Series
PIC® XLP™ 16Fr
Specifications of PIC16F723A-I/SS
Core Size
8-Bit
Program Memory Size
7KB (4K x 14)
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Core Processor
PIC
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Number Of I /o
25
Program Memory Type
FLASH
Ram Size
192 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 11x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SSOP
Controller Family/series
PIC16F
No. Of I/o's
25
Ram Memory Size
192Byte
Cpu Speed
20MHz
No. Of Timers
3
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
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Price
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PIC16F/LF722A/723A
11.1.3
A single software programmable prescaler is available
for use with either Timer0 or the Watchdog Timer
(WDT), but not both simultaneously. The prescaler
assignment is controlled by the PSA bit of the OPTION
register. To assign the prescaler to Timer0, the PSA bit
must be cleared to a ‘0’.
There are 8 prescaler options for the Timer0 module
ranging from 1:2 to 1:256. The pres ca le values are
selectable via the PS<2:0> bits of the OPTION register.
In order to have a 1:1 prescaler value for the Timer0
module, the prescaler must be assigned to the WDT
module.
The prescaler is not readable or writable. When
assigned to the Timer0 module, all instructions writing to
the TMR0 register will clear the prescaler.
11.1.4
Timer0 will generate an interrupt when the TMR0
register overflows from PH to 00h. The T0IF interrupt
flag bit of the INTCON register is set every time the
TMR0 register overflows, regardless of whether or not
the Timer0 interrupt is enabled. The T0IF bit can only
be cleared in software. The Timer0 interrupt enable is
the T0IE bit of the INTCON register.
11.1.5
When in 8-Bit Counter mode, the incrementing edge on
the T0CKI pin must be synchronized to the instruction
clock. Synchronization can be accomplished by
sampling the prescaler output on the Q2 and Q4 cycles
of the instruction clock. The high and low periods of the
external clocking source must meet the timing
requirements as shown in Section 23.0 “Electrical
Specifications”.
DS41417A-page 100
Note:
Note:
SOFTWARE PROGRAMMABLE
PRESCALER
When the prescaler is assigned to WDT, a
CLRWDT instruction will clear the prescaler
along with the WDT.
TIMER0 INTERRUPT
The Timer0 interrupt cannot wake the
processor from Sleep since the timer is
frozen during Sleep.
8-BIT COUNTER MODE
SYNCHRONIZATION
2010 Microchip Technology Inc.
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