PIC16F688-I/P Microchip Technology Inc., PIC16F688-I/P Datasheet - Page 123

• Manufacturer Part Number: PIC16F688-I/P
• Description: 14 PIN, 7 KB FLASH, 256 RAM, 12 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F688-I/P

• A/d Inputs: 8-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 12
• Interface: USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 14-pin PDIP
• Programmable Memory: 7K Bytes
• Ram Size: 256 Bytes
• Speed: 20 MHz
• Timers: 1-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

FIGURE 11-8:
TABLE 11-6:
© 2006 Microchip Technology Inc.
INTCON
PIE1
PIR1
Legend:
Instruction Flow
Note 1:
GIE bit
(INTCON<7>)
INTF Flag
(INTCON<1>)
CLKOUT
Name
INT pin
OSC1
Instruction
Executed
Instruction
Fetched
PC
2:
3:
4:
5:
x = unknown, u = unchanged, — = unimplemented read as ‘0’, q = value depends upon condition.
Shaded cells are not used by the Interrupt module.
(3)
INTF flag is sampled here (every Q1).
Asynchronous interrupt latency = 3-4 T
Latency is the same whether Inst (PC) is a single cycle or a two-cycle instruction.
CLKOUT is available only in INTOSC and RC Oscillator modes.
For minimum width of INT pulse, refer to AC specifications in Section 14.0 “Electrical Specifications”.
INTF is enabled to be set any time during the Q4-Q1 cycles.
EEIE
EEIF
Bit 7
GIE
SUMMARY OF REGISTERS ASSOCIATED WITH INTERRUPTS
Q1
Inst (PC - 1)
Inst (PC)
INT PIN INTERRUPT TIMING
(1)
Q2
PC
PEIE
ADIE
ADIF
Bit 6
Q3
(4)
Q4
(5)
RCIE
RCIF
Bit 5
T0IE
Q1
Inst (PC + 1)
Inst (PC)
Q2
(1)
Bit 4
INTE
C2IE
C2IF
PC + 1
CY
Q3
. Synchronous latency = 3 T
Q4
RAIE
Bit 3
C1IE
C1IF
Interrupt Latency
Q1
Dummy Cycle
Q2
OSFIE
OSFIF
PC + 1
Bit 2
T0IF
—
Q3
Q4
(2)
Bit 1
INTF
TXIE
TXIF
CY
, where T
Q1
Dummy Cycle
Inst (0004h)
Q2
TMR1IE
TMR1IF
0004h
Bit 0
RAIF
CY
Q3
= instruction cycle time.
PIC16F688
Q4
0000 000x
0000 0000
0000 0000
POR, BOR
Value on
Q1
DS41203C-page 121
Inst (0005h)
Q2
Inst (0004h)
0005h
0000 000x
0000 0000
0000 0000
Value on
Q3
all other
Resets
Q4