PIC17C756-33I/L Microchip Technology, PIC17C756-33I/L Datasheet - Page 94
![no-image](/images/manufacturer_photos/0/4/439/microchip_technology_sml.jpg)
PIC17C756-33I/L
Manufacturer Part Number
PIC17C756-33I/L
Description
MICRO CTRL 16K MEMORY OTP 68PLCC
Manufacturer
Microchip Technology
Series
PIC® 17Cr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC17C752-16L.pdf
(304 pages)
3.PIC17C752-16L.pdf
(4 pages)
4.PIC17C752-16L.pdf
(6 pages)
5.PIC17C756CL.pdf
(321 pages)
Specifications of PIC17C756-33I/L
Core Processor
PIC
Core Size
8-Bit
Speed
33MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
50
Program Memory Size
32KB (16K x 16)
Program Memory Type
OTP
Ram Size
902 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 6 V
Data Converters
A/D 12x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
68-PLCC
For Use With
AC164308 - MODULE SKT FOR PM3 68PLCCDVA17XL681 - DEVICE ADAPTER FOR PIC17C752DM173001 - KIT DEVELOPMENT PICDEM17AC174007 - MODULE SKT PROMATEII 68PLCCAC164024 - ADAPTER PICSTART PLUS 68PLCC
Lead Free Status / RoHS Status
Request inventory verification / Request inventory verification
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC17C756-33I/L
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
- PIC16F616T-ISL PDF datasheet
- PIC17C752-16L PDF datasheet #2
- PIC17C752-16L PDF datasheet #3
- PIC17C752-16L PDF datasheet #4
- PIC17C756CL PDF datasheet #5
- Current page: 94 of 304
- Download datasheet (6Mb)
PIC17C7XX
10.10.2
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
(Figure 10-20). Therefore, care 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 depen-
dent) before executing the instruction that reads the
values on that I/O port. 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 10-20:
FIGURE 10-21:
DS30289B-page 94
PIC17CXXX
Note 1: This is not a capacitor to ground, but the effective
Instruction
Instruction
RB7:RB0
Executed
Fetched
SUCCESSIVE OPERATIONS ON I/O
PORTS
capacitive loading on the trace.
I/O
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
MOVWF PORTB
write to
PORTB
SUCCESSIVE I/O OPERATION
I/O CONNECTION ISSUES
PC
C
(1)
MOVF PORTB,W
MOVWF PORTB
PORTx, PINy
write to
PORTB
PC + 1
V
IL
MOVF PORTB,W
Port pin
sampled here
BSF PORTx, PINy
Q2
PC + 2
NOP
Q3
Figure 10-21 shows the I/O model which causes this
situation. As the effective capacitance (C) becomes
larger, the rise/fall time of the I/O pin increases. As the
device frequency increases, or the effective capaci-
tance 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 a 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.
Q4
PC + 3
NOP
NOP
Read PORTx, PINy as low
BSF PORTx, PINz clears the value
to be driven on the PORTx, PINy pin.
Q1
BSF PORTx, PINz
Note:
This example shows a write to PORTB,
followed by a read from PORTB.
Note that:
data setup time = (0.25T
where
Therefore, at higher clock frequencies, a
write followed by a read may be problematic.
Q2
T
T
2000 Microchip Technology Inc.
CY
PD
= instruction cycle
= propagation delay
Q3
Q4
CY
- T
PD
)
Q1
Related parts for PIC17C756-33I/L
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![PIC17C756-16/SP](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
MICRO CTRL 16K MEMORY OTP 64SDIP
Manufacturer:
Microchip Technology
Datasheet:
![PIC17C756-33I/SP](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
MICRO CTRL 16K MEMORY OTP 64SDIP
Manufacturer:
Microchip Technology
Datasheet:
![PIC17C756-16/L](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
MICRO CTRL 16K MEMORY OTP 68PLCC
Manufacturer:
Microchip Technology
Datasheet:
![PIC17C756-16I/L](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
MICRO CTRL 16K MEMORY OTP 68PLCC
Manufacturer:
Microchip Technology
Datasheet:
![PIC17C756-33/SP](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
MICRO CTRL 16K MEMORY OTP 64SDIP
Manufacturer:
Microchip Technology
Datasheet:
![PIC17C756-16I/SP](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
MICRO CTRL 16K MEMORY OTP 64SDIP
Manufacturer:
Microchip Technology
Datasheet:
![PIC17C756/CL](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
MICRO CTRL 16K MEMORY EPROM 68CL
Manufacturer:
Microchip Technology
Datasheet:
![PIC17C756-33/L](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
MICRO CTRL 16K MEMORY OTP 68PLCC
Manufacturer:
Microchip Technology
Datasheet:
![PIC17C756](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
High-Performance 8-Bit CMOS EPROM Microcontrollers
Manufacturer:
Microchip Technology
![TC1014-2.7VCT](/images/manufacturer_photos/0/4/440/microchip_technology_inc__tmb.jpg)
Part Number:
Description:
Manufacturer:
Microchip Technology Inc.
Datasheet:
![TC1014-5.0VCT](/images/manufacturer_photos/0/4/440/microchip_technology_inc__tmb.jpg)
Part Number:
Description:
Manufacturer:
Microchip Technology Inc.
Datasheet:
![TC1055-2.5VCT](/images/manufacturer_photos/0/4/440/microchip_technology_inc__tmb.jpg)
Part Number:
Description:
Manufacturer:
Microchip Technology Inc.
Datasheet:
![TC1055-2.7VCT](/images/manufacturer_photos/0/4/440/microchip_technology_inc__tmb.jpg)
Part Number:
Description:
Manufacturer:
Microchip Technology Inc.
Datasheet: