PIC16C715/JW Microchip Technology, PIC16C715/JW Datasheet - Page 41

• Manufacturer Part Number: PIC16C715/JW
• Description: IC MCU EPROM 2KX14 A/D 18CDIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C715/JW

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 13
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: EPROM, UV
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 18-CDIP (0.300", 7.62mm) Window
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Connectivity: -

7.2
The A/D conversion time per bit is defined as T
A/D conversion requires 9.5T
The source of the A/D conversion clock is software
selectable. The four possible options for T
For correct A/D conversions, the A/D conversion clock
(T
of:
2.0 s for the PIC16C71
1.6 s for all other PIC16C71X devices
Table 7-1 and Table 7-2 and show the resultant T
times derived from the device operating frequencies
and the A/D clock source selected.
TABLE 7-1:
TABLE 7-2:
Operation
2T
8T
32T
RC
Legend: Shaded cells are outside of recommended range.
Note 1: The RC source has a typical T
Operation
2T
8T
32T
RC
Legend: Shaded cells are outside of recommended range.
Note 1: The RC source has a typical T
AD
1997 Microchip Technology Inc.
OSC
OSC
OSC
OSC
(5)
(5)
• 2T
• 8T
• 32T
• Internal RC oscillator
) must be selected to ensure a minimum T
OSC
OSC
AD Clock Source (T
2: These values violate the minimum required T
3: For faster conversion times, the selection of another clock source is recommended.
4: When device frequency is greater than 1 MHz, the RC A/D conversion clock source is recommended for
5: For extended voltage devices (LC), please refer to Electrical Specifications section.
2: These values violate the minimum required T
3: For faster conversion times, the selection of another clock source is recommended.
4: When device frequency is greater than 1 MHz, the RC A/D conversion clock source is recommended for
5: For extended voltage devices (LC), please refer to Electrical Specifications section.
AD Clock Source (T
Selecting the A/D Conversion Clock
OSC
OSC
sleep operation only.
sleep operation only.
OSC
ADCS1:ADCS0
T
T
AD
AD
ADCS1:ADCS0
00
01
10
11
vs. DEVICE OPERATING FREQUENCIES, PIC16C71
vs. DEVICE OPERATING FREQUENCIES, PIC16C710/711, PIC16C715
AD
00
01
10
11
)
AD
AD
)
per 8-bit conversion.
2 - 6 s
100 ns
400 ns
1.6 s
20 MHz
AD
AD
AD
time of 4 s.
2 - 6 s
time of 4 s.
(2)
(1,4)
are:
100 ns
400 ns
(2)
(2)
20 MHz
1.6 s
AD
AD
. The
time
(1,4)
(2)
(2)
AD
2 - 6 s
125 ns
500 ns
AD
AD
16 MHz
2.0 s
time.
time.
(1,4)
(2)
(2)
2 - 6 s
7.3
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
CHS2:CHS0 bits and the TRIS bits.
400 ns
5 MHz
1.6 s
6.4 s
Device Frequency
Note 1: When reading the port register, all pins
Note 2: Analog levels on any pin that is defined as
Device Frequency
2 - 6 s
(1,4)
(2)
500 ns
Configuring Analog Port Pins
4 MHz
2.0 s
8.0 s
configured as analog input channels will
read as cleared (a low level). Pins config-
ured as digital inputs, will convert an ana-
log input. Analog levels on a digitally
configured input will not affect the conver-
sion accuracy.
a digital input (including the AN7:AN0
pins), may cause the input buffer to con-
sume current that is out of the devices
specification.
(1,4)
(2)
2 - 6 s
1.25 MHz
25.6 s
OH
1.6 s
6.4 s
or V
32.0 s
2 - 6 s
PIC16C71X
1 MHz
2.0 s
8.0 s
(1,4)
(3)
OL
) will be converted.
(3)
(1)
DS30272A-page 41
333.33 kHz
2 - 6 s
333.33 kHz
24 s
96 s
2 - 6 s
24 s
96 s
6 s
6 s
(3)
(3)
(1)
(3)
(3)
(1)