PIC16F76-I/SS Microchip Technology, PIC16F76-I/SS Datasheet - Page 155
PIC16F76-I/SS
Manufacturer Part Number
PIC16F76-I/SS
Description
IC MCU FLASH 8KX14 A/D 28SSOP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16F818-ISO.pdf
(6 pages)
4.PIC16F73-ISP.pdf
(174 pages)
5.PIC16F73-ISP.pdf
(14 pages)
6.PIC16F73-ISP.pdf
(12 pages)
Specifications of PIC16F76-I/SS
Program Memory Type
FLASH
Program Memory Size
14KB (8K x 14)
Package / Case
28-SSOP
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
22
Ram Size
368 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 5x8b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
368 B
Interface Type
I2C/SPI/USART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
22
Number Of Timers
3
Operating Supply Voltage
2 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
ICE2000, DM163022
Minimum Operating Temperature
- 40 C
On-chip Adc
5-ch x 8-bit
Controller Family/series
PIC16F
No. Of I/o's
22
Ram Memory Size
368Byte
Cpu Speed
20MHz
No. Of Timers
3
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AC164307 - MODULE SKT FOR PM3 28SSOPXLT28SS-1 - SOCKET TRANSITION ICE 28SSOP
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F76-I/SS
Manufacturer:
Microchip Technology
Quantity:
135
Company:
Part Number:
PIC16F76-I/SS
Manufacturer:
MICROCHIP
Quantity:
7
Part Number:
PIC16F76-I/SS
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
- PIC16F616T-ISL PDF datasheet
- PIC16F688T-ISL PDF datasheet #2
- PIC16F818-ISO PDF datasheet #3
- PIC16F73-ISP PDF datasheet #4
- PIC16F73-ISP PDF datasheet #5
- PIC16F73-ISP PDF datasheet #6
- Current page: 155 of 688
- Download datasheet (3Mb)
9.10.2
1997 Microchip Technology Inc.
Note:
PIC16CXXX
Successive Operations on an I/O Port
This is not a capacitor to ground, but the effective capac-
itive loading on the trace.
I/O
The actual write to an I/O port happens at the end of an instruction cycle, whereas for reading,
the data must be valid at the beginning of the instruction cycle
must be exercised if a write followed by a read operation is carried out on the same I/O port. The
sequence of instructions should be such to allow the pin voltage to stabilize (load dependent)
before the next instruction which causes that file to be read into the CPU is executed. Otherwise,
the previous state of that pin may be read into the CPU rather than the new state. When in doubt,
it is better to separate these instructions with a NOP or another instruction not accessing this I/O
port.
Figure 9-12: Successive I/O Operation
Figure 9-13
becomes larger, the rise/fall time of the I/O pin increases. As the device frequency increases or
the effective capacitance increases, the possibility of this subsequent PORTx read-modify-write
instruction issue increases. This effective capacitance includes the effects of the board traces.
The best way to address this is to add an series resistor at the I/O pin. This resistor allows the
I/O pin to get to the desired level before the next instruction.
The use of NOP instructions between the subsequent PORTx read-modify-write instructions, is a
lower cost solution, but has the issue that the number of NOP instructions is dependent on the
effective capacitance C and the frequency of the device.
Figure 9-13: I/O Connection Issues
This example shows a write to PORTB followed by a read from PORTB.
Instruction
Instruction
Note:
RB7:RB0
executed
C
fetched
(1)
shows the I/O model which causes this situation. As the effective capacitance (C)
PORTx, PINy
PC
Data setup time = (0.25T
whereT
T
Therefore, at higher clock frequencies, a write followed by a read may be
problematic due to external capacitance.
PD
Q1
MOVWF PORTB
= propagation delay
write to
PORTB
CY
Q2
PC
V
IL
= instruction cycle
Q3 Q4
BSF PORTx, PINy
Q2
MOVF PORTB,W
MOVWF PORTB
Q1
Q3
write to
PORTB
CY
Q2
PC + 1
Section 9. I/O Ports
- T
Q4
Q3 Q4
PD
Read PORTx, PINy as low
)
BSF PORTx, PINz clears the value
to be driven on the PORTx, PINy pin.
Q1
T
Q1
MOVF PORTB,W
PD
BSF PORTx, PINz
Port pin
sampled here
Q2
NOP
PC + 2
Q2
Q3 Q4
(Figure
Q3
9-12). Therefore, care
Q1
DS31009A-page 9-15
Q4
Q2
PC + 3
NOP
NOP
Q3 Q4
Q1
9
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