PIC16F818-I/P Microchip Technology, PIC16F818-I/P Datasheet - Page 87

• Manufacturer Part Number: PIC16F818-I/P
• Description: IC MCU FLASH 1KX14 18-DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F818-I/P

• Program Memory Type: FLASH
• Program Memory Size: 1.75KB (1K x 14)
• Package / Case: 18-DIP (0.300", 7.62mm)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: I2C/SPI/SSP
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 3
• Operating Supply Voltage: 2 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: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 5-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ACICE0202 - ADAPTER MPLABICE 18P 300 MILAC164010 - MODULE SKT PROMATEII DIP/SOIC
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

11.2
The A/D conversion time per bit is defined as T
A/D conversion requires 9.0 T
The source of the A/D conversion clock is software
selectable. The seven possible options for T
• 2 T
• 4 T
• 8 T
• 16 T
• 32 T
• 64 T
• Internal A/D module RC oscillator (2-6 s)
For correct A/D conversions, the A/D conversion clock
(T
as small as possible, but no less than 1.6 s and not
greater than 6.4 s.
Table 11-1 shows the resultant T
the device operating frequencies and the A/D clock
source selected.
TABLE 11-1:
 2003 Microchip Technology Inc.
Note 1:
AD
) must be selected to ensure a minimum T
OSC
OSC
OSC
OSC
OSC
OSC
2:
3:
Operation
RC
16 T
32 T
64 T
Selecting the A/D Conversion
Clock
2 T
4 T
8 T
The RC source has a typical T
When the device frequencies are greater than 1 MHz, the RC A/D conversion clock source is only
recommended for Sleep operation.
For extended voltage devices (LF), please refer to Section 15.0 “Electrical Characteristics”.
(1,2,3)
OSC
OSC
OSC
OSC
OSC
OSC
T
AD
vs. MAXIMUM DEVICE OPERATING FREQUENCIES (STANDARD DEVICES (F))
AD Clock Source (T
AD
AD
per 10-bit conversion.
ADCS<2>
times derived from
0
1
0
1
0
1
X
AD
AD
time of 4 s but can vary between 2-6 s.
AD
are:
AD
. The
time
AD
)
ADCS<1:0>
11.3
The ADCON1 and TRISA registers control the opera-
tion of the A/D port pins. The port pins that are desired
as analog inputs must have their corresponding TRIS
bits set (input). If the TRIS bit is cleared (output), the
digital output level (V
The A/D operation is independent of the state of the
CHS<2:0> bits and the TRIS bits.
Note 1: When reading the Port register, all pins
00
00
01
01
10
10
11
2: Analog levels on any pin that is defined as
Configuring Analog Port Pins
configured as analog input channels will
read as cleared (a low level). Pins config-
ured as digital inputs will convert an
analog input. Analog levels on a digitally
configured input will not affect the
conversion accuracy.
a digital input (including the AN4:AN0
pins) may cause the input buffer to
consume current out of the device
specification.
PIC16F818/819
OH
Maximum Device Frequency
or V
OL
) will be converted.
1.25 MHz
2.5 MHz
(Note 1)
10 MHz
20 MHz
20 MHz
5 MHz
DS39598D-page 85