PIC16F777-I/P Microchip Technology, PIC16F777-I/P Datasheet - Page 174
PIC16F777-I/P
Manufacturer Part Number
PIC16F777-I/P
Description
IC PIC MCU FLASH 8KX14 40DIP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16F737-ISP.pdf
(276 pages)
4.PIC16F737-ISP.pdf
(10 pages)
Specifications of PIC16F777-I/P
Program Memory Type
FLASH
Program Memory Size
14KB (8K x 14)
Package / Case
40-DIP (0.600", 15.24mm)
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
36
Ram Size
368 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 14x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
368 B
Interface Type
AUSART/CCP/I2C/MSSP/SPI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
36
Number Of Timers
3
Operating Supply Voltage
4 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
ICE2000, DM163022
Minimum Operating Temperature
- 40 C
On-chip Adc
14-ch x 10-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
I3DBF777 - BOARD DAUGHTER ICEPIC3DVA18XP400 - DEVICE ADAPTER 18F4220 PDIP 40LD444-1001 - DEMO BOARD FOR PICMICRO MCU
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
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Manufacturer
Quantity
Price
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MIC
Quantity:
5 510
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- PIC16F616T-ISL PDF datasheet
- PIC16F688T-ISL PDF datasheet #2
- PIC16F737-ISP PDF datasheet #3
- PIC16F737-ISP PDF datasheet #4
- Current page: 174 of 688
- Download datasheet (3Mb)
PICmicro MID-RANGE MCU FAMILY
11.5
11.5.1
11.5.2
DS31011A-page 11-6
Note 1: Delay from clock input change to Timer0 increment is 3Tosc to 7Tosc. (Duration of Q = Tosc).
2: External clock if no prescaler selected, Prescaler output otherwise.
3: The arrows indicate the points in time where sampling occurs.
External Clock Synchronization
TMR0 Increment Delay
Using Timer0 with an External Clock
External Clock/Prescaler
Output after sampling
External Clock Input or
Prescaler output
Therefore, the error in measuring the interval between two edges on Timer0 input = 4Tosc max.
Increment Timer0 (Q4)
When an external clock input is used for Timer0, it must meet certain requirements as detailed
in
can be synchronized with the internal phase clock (T
incrementing of Timer0 after synchronization.
When no prescaler is used, the external clock input is the same as the prescaler output. The syn-
chronization of T0CKI with the internal phase clocks is accomplished by sampling the prescaler
output on the Q2 and Q4 cycles of the internal phase clocks
essary for T0CKI to be high for at least 2Tosc (and a small RC delay of 20 ns) and low for at least
2Tosc (and a small RC delay of 20 ns). Refer to
ification of the desired device.
When a prescaler is used, the external clock input is divided by an asynchronous ripple-counter
type prescaler so that the prescaler output is symmetrical. For the external clock to meet the
sampling requirement, the ripple-counter must be taken into account. Therefore, it is necessary
for T0CKI to have a period of at least 4Tosc (and a small RC delay of 40 ns) divided by the pres-
caler value. The only requirement on T0CKI high and low time is that they do not violate the min-
imum pulse width requirement of 10 ns. Refer to
specification of the desired device.
Since the prescaler output is synchronized with the internal clocks, there is a small delay from
the time the external clock edge occurs to the time the Timer0 module is actually incremented.
Figure 11-5
Figure 11-5: Timer0 Timing with External Clock
11.5.1 “External Clock Synchronization.”
(2)
Timer0
shows the delay from the external clock edge to the timer incrementing.
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
(3)
(1)
T0
parameters
These requirements ensure the external clock
parameters
OSC
T0 + 1
). Also, there is a delay in the actual
40,
(Figure
41
40,
and
1997 Microchip Technology Inc.
41
11-5). Therefore, it is nec-
42
and
in the electrical spec-
T0 + 2
42
Small pulse
misses sampling
in the electrical
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