參數(shù)資料
型號： PIC16C54C
廠商： Microchip Technology Inc.
英文描述： EPROM/ROM-Based 8-Bit CMOS Microcontroller(18引腳、12個I/O端口、512位EPROM/ROM的8位CMOS微控制器)
中文描述： 存儲器/基于ROM的8位CMOS微控制器（18引腳，12個的I / O，512位存儲器端口/光盤的8位的CMOS微控制器）
文件頁數(shù)： 13/158頁
文件大?。?/td> 1194K
代理商： PIC16C54C
2000 Microchip Technology Inc.
Preliminary
DS30453C-page 13
PIC16C5X
3.1
Clocking Scheme/Instruction Cycle
The clock input (OSC1/CLKIN pin) is internally divided
by four to generate four non-overlapping quadrature
clocks, namely Q1, Q2, Q3 and Q4. Internally, the pro-
gram counter is incremented every Q1 and the instruc-
tion is fetched from program memory and latched into
the instruction register in Q4. It is decoded and exe-
cuted during the following Q1 through Q4. The clocks
and instruction execution flow are shown in Figure 3-2
and Example 3-1.
3.2
Instruction Flow/Pipelining
An Instruction Cycle consists of four Q cycles (Q1, Q2,
Q3 and Q4). The instruction fetch and execute are pipe-
lined such that fetch takes one instruction cycle, while
decode and execute takes another instruction cycle.
However, due to the pipelining, each instruction effec-
tively executes in one cycle. If an instruction causes the
program counter to change (e.g.,
GOTO
), then two
cycles are required to complete the instruction
(Example 3-1).
A fetch cycle begins with the program counter (PC)
incrementing in Q1.
In the execution cycle, the fetched instruction is latched
into the Instruction Register in cycle Q1. This instruc-
tion is then decoded and executed during the Q2, Q3
and Q4 cycles. Data memory is read during Q2 (oper-
and read) and written during Q4 (destination write).
FIGURE 3-2:
CLOCK/INSTRUCTION CYCLE
EXAMPLE 3-1:
INSTRUCTION PIPELINE FLOW
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
OSC1
Q1
Q2
Q3
Q4
PC
OSC2/CLKOUT
(RC mode)
PC
PC+1
PC+2
Fetch INST (PC)
Execute INST (PC-1)
Fetch INST (PC+1)
Execute INST (PC)
Fetch INST (PC+2)
Execute INST (PC+1)
Internal
phase
clock
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.
1. MOVLW 55H
Fetch 1
Execute 1
Fetch 2
2. MOVWF PORTB
Execute 2
Fetch 3
3. CALL SUB_1
Execute 3
Fetch 4
4. BSF PORTA, BIT3
Flush
Fetch SUB_1 Execute SUB_1
相關(guān)PDF資料
PDF描述
PIC16C54 EPROM/ROM-Based 8-Bit CMOS Microcontroller Series(每個I/O口有20mA吸收,25mA驅(qū)動,12個I/O，2.5V的微控制器)
PIC16CR54B EPROM/ROM-Based 8-Bit CMOS Microcontroller Series(每個I/O口有20mA吸收,25mA驅(qū)動,12個I/O，2.5V的微控制器)
PIC16CR56A EPROM/ROM-Based 8-Bit CMOS Microcontroller Series(每個I/O有20mA吸收/25mA驅(qū)動,12個I/O，2.5V的微控制器)
PIC16CR57B EPROM/ROM-Based 8-Bit CMOS Microcontroller Series(每個I/O有20mA吸收/25mA驅(qū)動,20個I/O，2.5V的微控制器)
PIC16C54A EPROM/ROM-Based 8-Bit CMOS Microcontroller Series(每個I/O口有20mA吸收,25mA驅(qū)動,12個I/O，2.5V的微控制器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC16C54C/JW 功能描述:8位微控制器 -MCU .75KB 25 RAM 12 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16C54C-04/P 功能描述:8位微控制器 -MCU .75KB 25 RAM 12 I/O 4MHz PDIP18 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16C54C-04/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16C54 DIP18
PIC16C54C04/SO 制造商:Microchip Technology 功能描述:8 PIC16C 4MHz 18SOIC 制造商:Microchip Technology 功能描述:8 PIC16C 4MHz 18SOIC Bulk
PIC16C54C-04/SO 功能描述:8位微控制器 -MCU .75KB 25 RAM 12 I/O 4MHz SOIC18 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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