- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄190059 > PIC16C505-20/P 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PDIP14 PDF資料下載
參數(shù)資料
| 型號： | PIC16C505-20/P |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PDIP14 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-14 |
| 文件頁數(shù)： | 9/85頁 |
| 文件大?。?/td> | 1205K |
| 代理商： | PIC16C505-20/P |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當前第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁
1999 Microchip Technology Inc.
DS40192C-page 17
PIC16C505
4.6
Program Counter
As a program instruction is executed, the Program
Counter (PC) will contain the address of the next
program instruction to be executed. The PC value is
increased by one every instruction cycle, unless an
instruction changes the PC.
For a GOTO instruction, bits 8:0 of the PC are provided
by the GOTO instruction word. The PC Latch (PCL) is
mapped to PC<7:0>. Bit 5 of the STATUS register
provides page information to bit 9 of the PC
For a CALL instruction, or any instruction where the
PCL is the destination, bits 7:0 of the PC again are
provided by the instruction word. However, PC<8>
does not come from the instruction word, but is always
cleared (Figure 4-3).
Instructions where the PCL is the destination, or
Modify PCL instructions, include MOVWF PC, ADDWF
PC,
and BSF PC,5.
FIGURE 4-3:
LOADING OF PC
BRANCH INSTRUCTIONS -
PIC16C505
Note:
Because PC<8> is cleared in the CALL
instruction or any Modify PCL instruction,
all subroutine calls or computed jumps are
limited to the first 256 locations of any pro-
gram memory page (512 words long).
PA0
STATUS
PC
87
0
PCL
9
10
Instruction Word
70
GOTO
Instruction
CALL
or Modify PCL Instruction
11
PA0
STATUS
PC
87
0
PCL
9
10
Instruction Word
70
11
Reset to ‘0’
4.6.1
EFFECTS OF RESET
The Program Counter is set upon a RESET, which
means that the PC addresses the last location in the
last page (i.e., the oscillator calibration instruction.)
After executing MOVLW
XX
, the PC will roll over to
location 00h and begin executing user code.
The STATUS register page preselect bits are cleared
upon a RESET, which means that page 0 is pre-
selected.
Therefore, upon a RESET, a
GOTO
instruction will
automatically cause the program to jump to page 0
until the value of the page bits is altered.
4.7
Stack
PIC16C505 devices have a 12-bit wide hardware
push/pop stack.
A CALL instruction will push the current value of stack
1 into stack 2 and then push the current program
counter value, incremented by one, into stack level 1. If
more than two sequential CALL’s are executed, only
the most recent two return addresses are stored.
A RETLW instruction will pop the contents of stack level
1 into the program counter and then copy stack level 2
contents into level 1. If more than two sequential
RETLW
’s are executed, the stack will be filled with the
address previously stored in level 2. Note that the
W register will be loaded with the literal value specified
in the instruction. This is particularly useful for the
implementation of data look-up tables within the
program memory.
Note 1: There are no STATUS bits to indicate
stack overflows or stack underflow condi-
tions.
Note 2: There are no instructions mnemonics
called PUSH or POP. These are actions that
occur from the execution of the CALL,
RETLW
, and instructions.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PIC16C54CT-04I/SO | 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDSO18 |
| PIC16C56A-20I/JW | 8-BIT, UVPROM, 20 MHz, RISC MICROCONTROLLER, CDIP18 |
| PIC16C620A-04/P301 | 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDIP18 |
| PIC16C620A-20/P301 | 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PDIP18 |
| PIC16LC620A-20/P | 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PDIP18 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIC16C505T-04/SL | 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 4MHz SOIC14 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 安裝風格:SMD/SMT |
| PIC16C505T-04E/SL | 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 4MHz Ext Temp SOIC14 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 安裝風格:SMD/SMT |
| PIC16C505T-04I/SL | 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 4MHz Ind Temp SOIC14 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 安裝風格:SMD/SMT |
| PIC16C505T-20/SL | 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 20MHz SOIC14 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 安裝風格:SMD/SMT |
| PIC16C505T-20E/SL | 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 20MHz ExtTemp SOIC14 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 安裝風格:SMD/SMT |
發(fā)布緊急采購，3分鐘左右您將得到回復。