PIC16F946T-I/PT Microchip Technology, PIC16F946T-I/PT Datasheet - Page 151

• Manufacturer Part Number: PIC16F946T-I/PT
• Description: Microcontroller
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F946T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 14KB (8K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 336 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MA160011 - DAUGHTER BOARD PICDEM LCD 16F91X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

12.0
The Analog-to-Digital converter (A/D) allows conversion
of an analog input signal to a 10-bit binary representation
of that signal. The PIC16F946 has up to eight analog
inputs, multiplexed into one sample and hold circuit. The
output of the sample and hold is connected to the input of
the converter. The converter generates a binary result via
successive approximation and stores the result in a 10-bit
register. The voltage reference used in the conversion is
software selectable to either V
the V
A/D on the PIC16F946.
FIGURE 12-1:
© 2005 Microchip Technology Inc.
REF
ANALOG-TO-DIGITAL
CONVERTER (A/D) MODULE
pin. Figure 12-1 shows the block diagram of the
RA3/AN3/C1+/V
RA5/AN4/C2OUT/SS/SEG5
RA2/AN2/C2+/V
RA0/AN0/C1-/SEG12
A/D BLOCK DIAGRAM
RA1/AN1/C2-/SEG7
RE0/AN5/SEG21
RE1/AN6/SEG22
RE2/AN7/SEG23
DD
REF
REF
CHS<2:0>
or a voltage applied by
+/SEG15
-/COM2
Preliminary
V
V
REF
REF
+
-
V
GO/DONE
DD
VCFG0 = 0
VCFG0 = 1
VCFG1 = 0
VCFG1 = 1
ADON
V
SS
A/D
ADFM
PIC16F946
ADRESH ADRESL
DS41265A-page 149
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10