PIC16C74A-20I/L Microchip Technology, PIC16C74A-20I/L Datasheet - Page 121

• Manufacturer Part Number: PIC16C74A-20I/L
• Description: IC MCU OTP 4KX14 A/D PWM 44PLCC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C74A-20I/L

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Number Of I /o: 33
• Program Memory Type: OTP
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Data Converters: A/D 8x8b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Controller Family/series: PIC16C
• No. Of I/o's: 33
• Ram Memory Size: 192Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Processor Series: PIC16C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 192 B
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 33
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000, DM163022
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164309 - MODULE SKT FOR PM3 44PLCC444-1001 - DEMO BOARD FOR PICMICRO MCUDVA16XL441 - ADAPTER DEVICE ICE 44PLCC309-1040 - ADAPTER 44-PLCC ZIF TO 40-DIP309-1039 - ADAPTER 44-PLCC TO 40-DIPDV007003 - PROGRAMMER UNIVERSAL PROMATE II
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

13.2
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 1.6 s.
Table 13-1 shows the resultant T
the device operating frequencies and the A/D clock
source selected.
TABLE 13-1:
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
(5)
• 2T
• 8T
• 32T
• Internal RC oscillator
) must be selected to ensure a minimum T
OSC
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
Applicable Devices
72 73 73A 74 74A 76 77
OSC
OSC
sleep operation only.
OSC
T
AD
ADCS1:ADCS0
vs. DEVICE OPERATING FREQUENCIES
00
01
10
11
AD
AD
)
AD
per 8-bit conversion.
times derived from
AD
AD
time of 4 s.
2 - 6 s
are:
100 ns
400 ns
20 MHz
1.6 s
AD
AD
. The
time
(1,4)
(2)
(2)
AD
time.
2 - 6 s
13.3
The ADCON1, TRISA, and TRISE registers control the
operation of the A/D port pins. The port pins that are
desired as analog inputs must have their correspond-
ing TRIS bits set (input). If the TRIS bit is cleared (out-
put), the digital output level (V
converted.
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
Note 1: When reading the port register, all pins
Note 2: Analog levels on any pin that is defined as
Device Frequency
(1,4)
(2)
Configuring Analog Port Pins
Applicable Devices
72 73 73A 74 74A 76 77
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.
2 - 6 s
25.6 s
1.25 MHz
1.6 s
6.4 s
(1,4)
(3)
PIC16C7X
OH
DS30390E-page 121
or V
333.33 kHz
2 - 6 s
24 s
96 s
6 s
OL
) will be
(3)
(3)
(1)