PIC16LC923-04/L Microchip Technology, PIC16LC923-04/L Datasheet - Page 85
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PIC16LC923-04/L
Manufacturer Part Number
PIC16LC923-04/L
Description
IC MCU OTP 4KX14 LCD DVR 68PLCC
Manufacturer
Microchip Technology
Series
PIC® 16Cr
Datasheet
1.PIC16C923-04L.pdf
(189 pages)
Specifications of PIC16LC923-04/L
Core Processor
PIC
Core Size
8-Bit
Speed
4MHz
Connectivity
I²C, SPI
Peripherals
LCD, POR, PWM, WDT
Number Of I /o
25
Program Memory Size
7KB (4K x 14)
Program Memory Type
OTP
Ram Size
176 x 8
Voltage - Supply (vcc/vdd)
2.5 V ~ 6 V
Oscillator Type
External
Operating Temperature
0°C ~ 70°C
Package / Case
68-PLCC
Processor Series
PIC16LC
Core
PIC
Data Bus Width
8 bit
Data Ram Size
176 B
Interface Type
I2C, SPI
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
25
Number Of Timers
3
Operating Supply Voltage
2.5 V to 6 V
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
ICE2000
Minimum Operating Temperature
0 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16LC923-04/L
Manufacturer:
Microchip Technology
Quantity:
1 964
Company:
Part Number:
PIC16LC923-04/L
Manufacturer:
Microchip Technology
Quantity:
10 000
12.4.1
Not all applications require a result with 8-bits of reso-
lution, but may instead require a faster conversion time.
The A/D module allows users to make the trade-off of
conversion speed to resolution. Regardless of the res-
olution 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 electri-
cal specification). Once the T
mum specified time, all the following A/D result bits are
not valid (see A/D Conversion 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 determine
the time before the oscillator can be switched is as fol-
lows:
EXAMPLE 12-3: 4-BIT vs. 8-BIT CONVERSION TIMES
T
T
2T
1997 Microchip Technology Inc.
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OSC
Conversion time = 2T
Where: N = number of bits of resolution required.
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+ N • T
FASTER CONVERSION - LOWER
RESOLUTION TRADE-OFF
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+ (8 - N)(2T
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+ N • T
OSC
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)
time violates the mini-
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+ (8 - N)(2T
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time violates
OSC
)
Since the T
user must use some method (a timer, software loop,
etc.) to determine when the A/D oscillator may be
changed. Example 12-3 shows a comparison of time
required for a conversion with 4-bits of resolution, ver-
sus the 8-bit resolution conversion. The example is for
devices operating at 8 MHz (The A/D clock is pro-
grammed for 32T
after 6T
The 2T
the last 4-bits will not be converted to correct values.
Freq. (MHz)
OSC
AD
8
8
8
, the A/D clock is programmed for 2T
AD
violates the minimum T
is based from the device oscillator, the
OSC
), and assumes that immediately
12.5 ns
10.6 s
1.6 s
4-bit
PIC16C9XX
Resolution
DS30444E - page 85
AD
time, therefore
125 ns
1.6 s
16 s
8-bit
OSC
.