PIC16F946T-I/PT Microchip Technology, PIC16F946T-I/PT Datasheet - Page 211

• 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

Even if the flag bits were checked before executing a
SLEEP instruction, it may be possible for flag bits to
become set before the SLEEP instruction completes. To
determine whether a SLEEP instruction executed, test
the PD bit. If the PD bit is set, the SLEEP instruction
was executed as a NOP.
To ensure that the WDT is cleared, a CLRWDT instruction
should be executed before a SLEEP instruction.
FIGURE 16-10:
© 2005 Microchip Technology Inc.
Instruction Flow
(INTCON<1>)
(INTCON<7>)
Note
INTF flag
GIE bit
Instruction
Fetched
Instruction
Executed
OSC1
CLKO
INT pin
1:
2:
3:
4:
PC
(1)
(4)
XT, HS or LP Oscillator mode assumed.
T
GIE = 1 assumed. In this case after wake-up, the processor jumps to 0004h. If GIE = 0, execution will continue in-line.
CLKO is not available in XT, HS, LP or EC Oscillator modes, but shown here for timing reference.
OST
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1
Inst(PC) = Sleep
Inst(PC - 1)
= 1024 T
PC
WAKE-UP FROM SLEEP THROUGH INTERRUPT
OSC
(drawing not to scale). This delay does not apply to EC and RC Oscillator modes.
Inst(PC + 1)
Sleep
PC + 1
Processor in
Sleep
PC + 2
Preliminary
T
OST
(2)
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Interrupt Latency
Inst(PC + 2)
Inst(PC + 1)
PC + 2
(3)
Dummy Cycle
PC + 2
Dummy Cycle
PIC16F946
Inst(0004h)
0004h
DS41265A-page 209
Inst(0005h)
Inst(0004h)
0005h