PIC16F872-E/SS Microchip Technology, PIC16F872-E/SS Datasheet - Page 410

• Manufacturer Part Number: PIC16F872-E/SS
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SSOP,28PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F872-E/SS

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-SSOP
• Package: 28SSOP
• Device Core: PIC
• Family Name: PIC16
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 22
• Interface Type: I2C/SPI
• On-chip Adc: 5-chx10-bit
• Number Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PICmicro MID-RANGE MCU FAMILY
22.4
DS31022A-page 22-8
2T
8T
32T
RC
Note 1: The RC source has a typical T
2T
8T
32T
RC
Note 1: The RC source has a typical T
OSC
OSC
OSC
OSC
(5)
(5)
Operation
Operation
OSC
OSC
2: These values violate the minimum required T
3: For faster conversion times, the selection of another clock source is recommended.
4: For device frequencies above 1 MHz, the device must be in SLEEP for the entire conversion, or the A/D
2: These values violate the minimum required T
3: For faster conversion times, the selection of another clock source is recommended.
4: For device frequencies above 1 MHz, the device must be in SLEEP for the entire conversion, or the A/D
AD Clock Source (T
AD Clock Source (T
accuracy may be out of specification.
accuracy may be out of specification.
Selecting the A/D Conversion Clock
00
01
10
11
00
01
10
11
ADCS1:ADCS0
ADCS1:ADCS0
The A/D conversion time per bit is defined as T
conversion. The source of the A/D conversion clock is software selected. The four possible
options for T
For correct A/D conversions, the A/D conversion clock (T
mum T
2.0 s for the PIC16C71, as shown in
1.6 s for all other devices, as shown in
Table 22-1
frequencies and the A/D clock source selected.
Table 22-1: T
Table 22-2: T
• 2T
• 8T
• 32T
• Internal RC oscillator
AD
AD
AD
)
)
OSC
OSC
time of:
OSC
through
AD
(C Devices)
(LC Devices)
AD
AD
are:
100 ns
400 ns
1.6 s
2 - 6 s
500 ns
2.0 s
8.0 s
3 - 9 s
AD
AD
vs. Device Operating Frequencies, All Devices (except PIC16C71)
vs. Device Operating Frequencies, All Devices (except PIC16LC71)
Table 22-4
time of 4 s.
time of 6 s.
20 MHz
4 MHz
(2)
(2)
(2)
(2)
(1,4)
(1,4)
show the resultant T
AD
AD
time.
time.
400 ns
1.6 s
6.4 s
2 - 6 s
1.0 s
4.0 s
16.0 s
3 - 9 s
parameter 130
parameter 130
5 MHz
2 MHz
(2)
(2)
(1,4)
(1,4)
Device Frequency
Device Frequency
AD
. The A/D conversion requires 9.5 T
AD
of devices electrical specifications.
times derived from the device operating
of devices electrical specifications.
1.6 s
6.4 s
25.6 s
2 - 6 s
1.6 s
6.4 s
25.6 s
3 - 9 s
AD
) must be selected to ensure a mini-
1.25 MHz
1.25 MHz
(2)
(3)
(3)
(1,4)
(1,4)
1997 Microchip Technology Inc.
6 s
24 s
96 s
2 - 6 s
6 s
24 s
96 s
3 - 9 s
333.33 kHz
333.33 kHz
(3)
(3)
(3)
(3)
AD
(1)
(1)
per 8-bit