PIC12C672T-04/SM Microchip Technology, PIC12C672T-04/SM Datasheet - Page 132
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PIC12C672T-04/SM
Manufacturer Part Number
PIC12C672T-04/SM
Description
IC MCU OTP 2KX14 A/D 8-SOIJ
Manufacturer
Microchip Technology
Series
PIC® 12Cr
Datasheets
1.PIC16F688T-ISL.pdf
(688 pages)
2.PIC12CE673-10P.pdf
(129 pages)
3.PIC12CE673-10P.pdf
(14 pages)
Specifications of PIC12C672T-04/SM
Core Processor
PIC
Core Size
8-Bit
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
5
Program Memory Size
3.5KB (2K x 14)
Program Memory Type
OTP
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 4x8b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
For Use With
XLT08SO-1 - SOCKET TRANSITION 8SOIC 150/208AC164312 - MODULE SKT FOR PM3 16SOIC309-1048 - ADAPTER 8-SOIC TO 8-DIP309-1047 - ADAPTER 8-SOIC TO 8-DIP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Connectivity
-
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PICmicro MID-RANGE MCU FAMILY
8.3
8.4
DS31008A-page 8-10
INSTRUCTION FLOW
Note 1: INTF flag is sampled here (every Q1).
GIE bit
(INTCON<7>)
INTF flag
(INTCON<1>)
CLKOUT
INT pin
OSC1
Instruction
executed
Instruction
fetched
PC
2: Interrupt latency = 3-4 T
3: CLKOUT is available only in RC oscillator mode.
4: For minimum width of INT pulse, refer to AC specs.
5: INTF is enabled to be set anytime during the Q4-Q1 cycles.
Latency is the same whether Instruction (PC) is a single cycle or a 2-cycle instruction.
Interrupt Latency
INT and External Interrupts
3
Q1
Inst (PC-1)
Inst (PC)
Interrupt latency is defined as the time from the interrupt event (the interrupt flag bit gets set) to
the time that the instruction at address 0004h starts execution (when that interrupt is enabled).
For synchronous interrupts (typically internal), the latency is 3T
For asynchronous interrupts (typically external), such as the INT or Port RB Change Interrupt,
the interrupt latency will be 3 - 3.75T
when the interrupt event occurs
The latency is the same for both one and two cycle instructions.
The external interrupt on the INT pin is edge triggered: either rising if the INTEDG bit
(OPTION<6>) is set, or falling, if the INTEDG bit is clear. When a valid edge appears on the INT
pin, the INTF flag bit (INTCON<1>) is set. This interrupt can be enabled/disabled by setting/clear-
ing the INTE enable bit (INTCON<4>). The INTF bit must be cleared in software in the interrupt
service routine before re-enabling this interrupt. The INT interrupt can wake-up the processor
from SLEEP, if the INTE bit was set prior to going into SLEEP. The status of the GIE bit decides
whether or not the processor branches to the interrupt vector following wake-up. See the
“Watchdog Timer and Sleep Mode”
from SLEEP through INT interrupt.
Figure 8-2: INT Pin and Other External Interrupt Timing
1
Q2
PC
Note:
Q3
4
CY
Q4
5
Any interrupts caused by external signals (such as timers, capture, change on port)
will have similar timing.
where T
Q1
Inst (PC+1)
Inst (PC)
CY
Q2
1
= instruction cycle time.
PC+1
Q3
Q4
(Figure
Interrupt Latency
Q1
Dummy Cycle
CY
section for details on SLEEP and for timing of wake-up
8-2) in relation to the instruction cycle.
Q2
PC+1
(instruction cycles). The exact latency depends upon
—
Q3
Q4
2
Q1
Dummy Cycle
Inst (0004h)
Q2
0004h
CY
Q3
.
1997 Microchip Technology Inc.
Q4
Q1
Inst (0005h)
Q2
Inst (0004h)
0005h
Q3
Q4
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