PIC12C672-04/P Microchip Technology, PIC12C672-04/P Datasheet - Page 74
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PIC12C672-04/P
Manufacturer Part Number
PIC12C672-04/P
Description
IC MCU OTP 2KX14 A/D 8DIP
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 PIC12C672-04/P
Core Size
8-Bit
Program Memory Size
3.5KB (2K x 14)
Core Processor
PIC
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
5
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-DIP (0.300", 7.62mm)
Controller Family/series
PIC12
No. Of I/o's
6
Ram Memory Size
128Byte
Cpu Speed
4MHz
No. Of Timers
1
Digital Ic Case Style
DIP
Processor Series
PIC12C
Core
PIC
Data Bus Width
8 bit
Data Ram Size
128 B
Maximum Clock Frequency
4 MHz
Number Of Programmable I/os
5
Number Of Timers
8
Maximum Operating Temperature
+ 70 C
Mounting Style
Through Hole
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
ICE2000
Minimum Operating Temperature
0 C
On-chip Adc
8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
ISPICR1 - ADAPTER IN-CIRCUIT PROGRAMMINGAC124001 - MODULE SKT PROMATEII 8DIP/SOIC
Eeprom Size
-
Connectivity
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC12C672-04/P
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
- Current page: 74 of 688
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PICmicro MID-RANGE MCU FAMILY
4.3
DS31004A-page 4-6
1. MOVLW 55h
2. MOVWF PORTB
3. CALL SUB_1
4. BSF
5. Instruction @ address SUB_1
All instructions are single cycle, except for any program branches. These take two cycles since the fetch
instruction is “flushed” from the pipeline while the new instruction is being fetched and then executed.
Instruction Flow/Pipelining
PORTA, BIT3 (Forced NOP)
An “Instruction Cycle” consists of four Q cycles (Q1, Q2, Q3, and Q4). Fetch takes one instruction
cycle while decode and execute takes another instruction cycle. However, due to Pipelining, each
instruction effectively executes in one cycle. If an instruction causes the program counter to
change (e.g. GOTO) then an extra cycle is required to complete the instruction
The instruction fetch begins with the program counter incrementing in Q1.
In the execution cycle, the fetched instruction is latched into the “Instruction Register (IR)” in
cycle Q1. This instruction is then decoded and executed during the Q2, Q3, and Q4 cycles. Data
memory is read during Q2 (operand read) and written during Q4 (destination write).
Example 4-1
At time T
tion executes while the second instruction is fetched. During T
cutes while the third instruction is fetched. During T
third instruction (CALL SUB_1) is executed. When the third instruction completes execution, the
CPU forces the address of instruction four onto the Stack and then changes the Program Counter
(PC) to the address of SUB_1. This means that the instruction that was fetched during T
to be “flushed” from the pipeline. During T
the instruction at address SUB_1 is fetched. Finally during T
the instruction at address SUB_1 + 1 is fetched.
Example 4-1: Instruction Pipeline Flow
Fetch 1
CY
T
CY
0, the first instruction is fetched from program memory. During T
shows the operation of the two stage pipeline for the instruction sequence shown.
0
Execute 1
Fetch 2
T
CY
1
Execute 2
Fetch 3
T
CY
CY
2
4, instruction four is flushed (executed as a NOP) and
Execute 3
Fetch 4
CY
T
CY
3, the fourth instruction is fetched while the
3
CY
Fetch SUB_1 Execute SUB_1
5, instruction five is executed and
CY
Flush
T
2, the second instruction exe-
CY
1997 Microchip Technology Inc.
4
CY
Fetch SUB_1 + 1
1, the first instruc-
(Example
T
CY
CY
5
3 needs
4-1).
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