PIC16F946T-I/PT Microchip Technology, PIC16F946T-I/PT Datasheet - Page 158

• 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

PIC16F946
FIGURE 12-4:
12.3
The A/D converter module can operate during Sleep.
This requires the A/D clock source to be set to the
internal oscillator. When the RC clock source is
selected, the A/D waits one instruction before starting
the conversion. This allows the SLEEP instruction to be
executed, thus eliminating much of the switching noise
from the conversion. When the conversion is complete,
the GO/DONE bit is cleared and the result is loaded
into the ADRESH:ADRESL registers. If the A/D
FIGURE 12-5:
DS41265A-page 156
Legend: C
A/D Operation During Sleep
V
I
R
SS
C
LEAKAGE
T
PIN
IC
HOLD
Zero-Scale
VA
ANALOG INPUT MODEL
A/D TRANSFER FUNCTION
= Input Capacitance
= Threshold Voltage
= Leakage current at the pin due to
= Interconnect Resistance
= Sampling Switch
= Sample/Hold Capacitance (from DAC)
R
various junctions
S
3FDh
3FCh
3FEh
3FBh
ANx
3FFh
004h
003h
002h
001h
000h
C
5 pF
PIN
1/2 LSB Ideal
Zero-Scale
Transition
V
DD
Full-Scale Range
V
V
T
T
Preliminary
= 0.6V
= 0.6V
Full-Scale
Transition
I
± 500 nA
LEAKAGE
interrupt is enabled, the device awakens from Sleep. If
the GIE bit (INTCON<7>) is set, the program counter is
set to the interrupt vector (0004h). If GIE is clear, the
next instruction is executed. If the A/D interrupt is not
enabled, the A/D module is turned off, although the
ADON bit remains set.
When the A/D clock source is something other than
RC, a SLEEP instruction causes the present conversion
to be aborted, and the A/D module is turned off. The
ADON bit remains set.
R
IC
1k
V
SS R
DD
Sampling
Switch
1/2 LSB Ideal
6V
5V
4V
3V
2V
1 LSB Ideal
SS
Center of
Full-Scale Code
Sampling Switch
5 6 7 8 9 10 11
V
© 2005 Microchip Technology Inc.
C
= DAC capacitance
= 10 pF
SS
(k )
Analog Input
HOLD
R
SS