PIC16F84AT-20E/SS Microchip Technology, PIC16F84AT-20E/SS Datasheet - Page 44
![IC MCU CMOS 20MHZ 1K FLSH 20SSOP](/photos/6/58/65895/150-20-ssop_sml.jpg)
PIC16F84AT-20E/SS
Manufacturer Part Number
PIC16F84AT-20E/SS
Description
IC MCU CMOS 20MHZ 1K FLSH 20SSOP
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F688T-ISL.pdf
(688 pages)
2.PIC16F84A-04P.pdf
(88 pages)
3.PIC16F84A-04P.pdf
(6 pages)
Specifications of PIC16F84AT-20E/SS
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Peripherals
POR, WDT
Number Of I /o
13
Program Memory Size
1.75KB (1K x 14)
Program Memory Type
FLASH
Eeprom Size
64 x 8
Ram Size
68 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Oscillator Type
External
Operating Temperature
-40°C ~ 125°C
Package / Case
20-SSOP
For Use With
XLT20SS1-1 - SOCKET TRANSITION 20DIP 20SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Connectivity
-
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PICmicro MID-RANGE MCU FAMILY
DS31002A-page 2-14
Figure 2-7
and OSCCAL = 70h), and the changes achievable by the OSCCAL register.
Figure 2-7: Ideal Internal RC Oscillator Frequency vs. OSCCAL Register Value
Figure 2-8
frequency can corrected to 4 MHz. These bits can be considered the fine trimming of the
frequency. Sometimes the device frequency at the uncalibrated point cannot be corrected to 4
MHz by the fine trimming of the CAL3:CAL0 bits value. Therefore two additional bits are available
which give a large frequency offset (positive and negative) to move the frequency within the
range where the fine trimming can work. These bits are the CALSLW and CALFST bits, which
offset the internal RC frequency. The action of these bits are shown in
Figure
Figure 2-8: CAL3:CAL0 Trimming of Internal RC Oscillator Frequency Offset
Frequency
4 MHz
4 MHz
(@ 5V, 25˚C)
2-10.
(slowest frequency)
shows the possible device frequencies from the uncalibrated point (at V
shows an example of a device where by selecting one of the CAL3:CAL0 values, the
> 4 MHz
< 4 MHz
CAL3:CAL0 = 0h
CALFST = 0
CALSLW = 1
1.5%
CAL3:CAL0 = 0000
CAL3:CAL0 = 0h
CALFST = 0
CALSLW = 0
One of the 16 possible calibration points
CAL3:CAL0 = 07h
CALFST = 0
CALSLW = 0
CAL3:CAL0
Trim Window
CAL3:CAL0
Trim Window
CAL3:CAL0 = Fh
CALFST = 0
CALSLW = 0
1997 Microchip Technology Inc.
CAL3:CAL0 = 1111
(fastest frequency)
CAL3:CAL0 = Fh
CALFST = 1
CALSLW = x
See X-axis
Internal RC
Frequency at
device reset
CALFST = 0
CALFLW = 0
CAL3:CAL0 = 7h
Figure
DD
= 5V, 25 C,
2-9, and
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