PIC18F8621T-I/PT Microchip Technology, PIC18F8621T-I/PT Datasheet - Page 241
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PIC18F8621T-I/PT
Manufacturer Part Number
PIC18F8621T-I/PT
Description
IC PIC MCU FLASH 32KX16 80TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC18F6525-IPT.pdf
(396 pages)
3.PIC18F6525-IPT.pdf
(8 pages)
4.PIC18F6525-IPT.pdf
(38 pages)
Specifications of PIC18F8621T-I/PT
Core Processor
PIC
Core Size
8-Bit
Speed
40MHz
Connectivity
EBI/EMI, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
69
Program Memory Size
64KB (32K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
3.75K x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 16x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
80-TFQFP
Processor Series
PIC18F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
3840 B
Interface Type
MSSP, SPI, I2C, EUSART
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
69
Number Of Timers
2 x 8 bit
Operating Supply Voltage
4.2 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DV164136, DM183032
Minimum Operating Temperature
- 40 C
On-chip Adc
16 bit
For Use With
XLT80PT3 - SOCKET TRAN ICE 80MQFP/TQFPAC164320 - MODULE SKT MPLAB PM3 80TQFPAC174011 - MODULE SKT PROMATEII 80TQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F8621T-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC18F6525-IPT PDF datasheet #2
- PIC18F6525-IPT PDF datasheet #3
- PIC18F6525-IPT PDF datasheet #4
- Current page: 241 of 396
- Download datasheet (8Mb)
20.2
The ADCON2 register allows the user to select an
acquisition time that occurs each time the GO/DONE
bit is set. It also gives users the option to use an
automatically determined acquisition time.
Acquisition time may be set with the ACQT2:ACQT0
bits (ADCON2<5:3>), which provides a range of 2 to
20 T
continues to sample the input for the selected acquisi-
tion time, then automatically begins a conversion.
Since the acquisition time is programmed, there may
be no need to wait for an acquisition time between
selecting a channel and setting the GO/DONE bit.
Automatic
ACQT2:ACQT0 = 000. When the GO/DONE bit is set,
sampling is stopped and a conversion begins. The user
is responsible for ensuring the required acquisition time
has passed between selecting the desired input
channel and setting the GO/DONE bit. This option is
also the default Reset state of the ACQT2:ACQT0 bits
and is compatible with devices that do not offer
programmable acquisition times.
In either case, when the conversion is completed, the
GO/DONE bit is cleared, the ADIF flag is set and the
A/D begins sampling the currently selected channel
again. If an acquisition time is programmed, there is
nothing to indicate if the acquisition time has ended or
if the conversion has begun.
TABLE 20-1:
2005 Microchip Technology Inc.
AD
. When the GO/DONE bit is set, the A/D module
Selecting and Configuring
Acquisition Time
acquisition
Operation
16 T
32 T
64 T
2 T
4 T
8 T
T
AD
RC
OSC
OSC
OSC
OSC
OSC
OSC
vs. DEVICE OPERATING FREQUENCIES
AD Clock Source (T
is
selected
when
PIC18F6525/6621/8525/8621
AD
)
the
ADCS2:ADCS0
000
100
001
101
010
110
x11
20.3
The A/D conversion time per bit is defined as T
A/D conversion requires 12 T
The source of the A/D conversion clock is software
selectable. There are seven possible options for T
• 2 T
• 4 T
• 8 T
• 16 T
• 32 T
• 64 T
• Internal RC oscillator
For correct A/D conversions, the A/D conversion clock
(T
of 1.6 µs.
Table 20-1 shows the resultant T
the device operating frequencies and the A/D clock
source selected.
AD
) must be selected to ensure a minimum T
OSC
OSC
OSC
OSC
OSC
OSC
Selecting the A/D Conversion
Clock
Maximum Device Frequency
PIC18F6525/6621/8525/8621
AD
1.25 MHz
2.50 MHz
5.00 MHz
10.0 MHz
20.0 MHz
40.0 MHz
per 10-bit conversion.
AD
—
DS39612B-page 239
times derived from
AD
AD
. The
AD
time
:
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