PIC16C770-I/SO Microchip Technology, PIC16C770-I/SO Datasheet - Page 112

• Manufacturer Part Number: PIC16C770-I/SO
• Description: IC MCU OTP 2KX14 A/D PWM 20-SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C770-I/SO

• Core Size: 8-Bit
• Program Memory Size: 3.5KB (2K x 14)
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI
• Number Of I /o: 15
• Program Memory Type: OTP
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 6x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SOIC (7.5mm Width)
• Controller Family/series: PIC16C
• No. Of I/o's: 16
• Ram Memory Size: 256Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ISPICR1 - ADAPTER IN-CIRCUIT PROGRAMMINGAC164028 - MODULE SKT PROMATEII 20SOIC/DIP309-1013 - ADAPTER 20-SOIC TO 20-DIP309-1012 - ADAPTER 20-SOIC TO 20-DIP
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: PIC16C770I/SO

PIC16C717/770/771
11.3
The A/D conversion cycle requires 13T
tling time, and 12 T
A/D conversion clock is software selected. If neither the
internal VRH nor VRL are used for the A/D converter,
the four possible options for T
TABLE 11-1:
DS41120B-page 110
External V
Analog Supply
Internal VRH or
VRL
Legend: Shaded cells are outside of recommended range.
Note 1: The A/D RC source has a typical T
A/D Reference
• 2 T
• 8 T
• 32 T
• A/D RC oscillator
Source
2: These values violate the minimum required T
3: For faster conversion times, the selection of another clock source is recommended.
4: When the device frequency is greater than 1 MHz, the A/D RC clock source is only recommended if the conversion will be
5: A/D RC clock source has a typical T
Selecting the A/D Conversion
Clock
OSC
OSC
performed during SLEEP.
REF
OSC
or
T
AD
2 T
8 T
32 T
A/D RC
16 T
64 T
256 T
A/D RC
AD
Operation
A/D Clock Source (T
for conversion. The source of the
OSC
OSC
vs. DEVICE OPERATING FREQUENCIES
OSC
OSC
OSC
OSC
AD
are:
ADCS<1:0>
AD
00
01
10
00
01
10
11
11
: 1 T
AD
AD
AD
time of 4 s for V
AD
time of 32 s for V
)
for set-
AD
16 - 48 s
2 - 6 s
time.
100 ns
400 ns
800 ns
3.2 s
20 MHz
12.8 s
1.6 s
DD
(1,4)
(2)
(2)
(2)
(2)
(4,5)
DD
> 3.0V.
If the VRH or VRL are used for the A/D converter refer-
ence, then the T
increased by a factor of 8.
For correct A/D conversions, the A/D conversion clock
(T
of 1.6 s. Table 11-1 shows the resultant T
derived from the device operating frequencies and the
A/D clock source selected.
The ADIF bit is set on the rising edge of the 14th T
The GO/DONE bit is cleared on the falling edge of the
14th T
> 3.0V.
AD
) must be selected to ensure a minimum T
16 - 48 s
2 - 6 s
AD
51.2 s
400 ns
6.4 s
3.2 s
12.8 s
5 MHz
1.6 s
.
Device Frequency
(3)
(1,4)
(2)
(2)
(3)
(4,5)
AD
16 - 48 s
2 - 6 s
requirement is automatically
500 ns
8.0 s
64 s
4 MHz
4 s
2.0 s
2002 Microchip Technology Inc.
16 s
(2)
(3)
(1,4)
(3)
(2)
(4,5)
16 - 48 s
2 - 6 s
204.8 s
1.25 MHz
25.6 s
51.2 s
12.8 s
1.6 s
6.4 s
AD
AD
(1,4)
(3)
(3)
times
(3)
(4,5)
time
AD
.