PIC16F84A-04/SS Microchip Technology, PIC16F84A-04/SS Datasheet - Page 415
![IC MCU FLASH 1KX14 EE 20SSOP](/photos/6/58/65895/150-20-ssop_sml.jpg)
PIC16F84A-04/SS
Manufacturer Part Number
PIC16F84A-04/SS
Description
IC MCU FLASH 1KX14 EE 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 PIC16F84A-04/SS
Core Size
8-Bit
Program Memory Size
1.75KB (1K x 14)
Core Processor
PIC
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
13
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
0°C ~ 70°C
Package / Case
20-SSOP
Controller Family/series
PIC16F
No. Of I/o's
13
Eeprom Memory Size
64Byte
Ram Memory Size
68Byte
Cpu Speed
4MHz
No. Of Timers
1
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
XLT20SS1-1 - SOCKET TRANSITION 20DIP 20SSOPI3-DB16F84A - BOARD DAUGHTER ICEPIC3AC164307 - MODULE SKT FOR PM3 28SSOPAC164018 - MODULE SKT PROMATEII 20SSOP
Data Converters
-
Connectivity
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
- Current page: 415 of 688
- Download datasheet (3Mb)
22.6.1
1997 Microchip Technology Inc.
Faster Conversion - Lower Resolution Trade-off
Section 22. Basic 8-bit A/D Converter
Not all applications require a result with 8-bits of resolution, but may instead require a faster con-
version time. The A/D module allows users to make the trade-off of conversion speed to resolu-
tion. Regardless of the resolution required, the acquisition time is the same. To speed up the
conversion, the clock source of the A/D module may be switched so that the T
the minimum specified time (see the applicable electrical specification). Once the T
lates the minimum specified time, all the following A/D result bits are not valid (see A/D Conver-
sion Timing in the Electrical Specifications section.) The clock sources may only be switched
between the three oscillator versions (cannot be switched from/to RC). The equation to deter-
mine the time before the oscillator can be switched is as follows:
Since the T
ware loop, etc.) to determine when the A/D oscillator may be changed.
comparison of time required for a conversion with 4-bits of resolution, versus the 8-bit resolution
conversion. The example is for devices operating at 20 MHz and 16 MHz (The A/D clock is pro-
grammed for 32T
for 2T
The 2T
values.
Example 22-3:
Note 1: The PIC16C71 has a minimum T
T
T
T
AD
OSC
AD
Conversion time = T
Where:
OSC
+ N • T
2: If the full 8-bit conversion is required, the A/D clock source should not be changed.
OSC
.
All other devices have a minimum T
AD
violates the minimum T
AD
is based from the device oscillator, the user must use some method (a timer, soft-
+ (10 - N)(2T
OSC
4-bit vs. 8-bit Conversion Times
N = number of bits of resolution required.
), and assumes that immediately after 5T
AD
+ N • T
OSC
)
AD
AD
+ (10 - N)(2T
time since the last 4-bits will not be converted to correct
AD
(MHz)
AD
time of 2.0 s.
Freq.
20
16
20
16
20
16
time of 1.6 s.
(1)
OSC
)
10.75 s
AD
62.5 ns
1.6 s
2.0 s
8.6 s
50 ns
4-bit
, the A/D clock is programmed
Resolution
Example 22-3
DS31022A-page 22-13
AD
62.5 ns
17.6 s
time violates
1.6 s
2.0 s
50 ns
22 s
8-bit
AD
time vio-
shows a
22
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