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參數(shù)資料
| 型號： | PIC12F510_07 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 8/14-Pin, 8-Bit Flash Microcontroller |
| 中文描述： | 8/14-Pin，8位閃存微控制器 |
| 文件頁數(shù)： | 25/116頁 |
| 文件大?。?/td> | 907K |
| 代理商： | PIC12F510_07 |
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2007 Microchip Technology Inc.
Preliminary
DS41268C-page 23
PIC12F510/16F506
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 Program Counter
(PCL) is mapped to PC<7:0>. Bit 5 of the STATUS
register provides page information to bit 9 of the PC
(Figure 4-4).
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 4-4).
Instructions where the PCL is the destination or modify
PCL instructions include
MOVWF PC
,
ADDWF PC
and
BSF PC
,
5.
FIGURE 4-4:
LOADING OF PC
BRANCH INSTRUCTIONS
4.6.1
EFFECTS OF RESET
The PC 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 preselected.
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
The PIC12F510/16F506 devices have a 2-deep, 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 PC 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 PC and then copy Stack Level 2
contents into Stack Level 1. If more than two sequential
RETLW
s are executed, the stack will be filled with the
address previously stored in Stack Level 2.
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
program memory page (512 words long).
PA0
STATUS
PC
8 7
0
PCL
9
Instruction Word
7
0
GOTO
Instruction
CALL
or Modify PCL Instruction
PA0
STATUS
PC
8 7
0
PCL
9
Instruction Word
Reset to ‘
0
’
7
0
Note 1:
The W register will be loaded with the lit-
eral value specified in the instruction. This
is particularly useful for the implementa-
tion of data look-up tables within the
program memory.
2:
There are no Status bits to indicate stack
overflows or stack underflow conditions.
3:
There are no instruction mnemonics
called PUSH or POP. These are actions
that occur from the execution of the
CALL
and
RETLW
instructions.
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相關(guān)代理商/技術(shù)參數(shù) |
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| PIC12F510-E/L | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8/14-Pin, 8-Bit Flash Microcontroller |
| PIC12F510-E/LQTP | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8/14-Pin, 8-Bit Flash Microcontroller |
| PIC12F510-E/LSQTP | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8/14-Pin, 8-Bit Flash Microcontroller |
| PIC12F510E/MC | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8/14-Pin, 8-Bit Flash Microcontrollers |
| PIC12F510-E/MC | 功能描述:8位微控制器 -MCU 1.5 KB Flash 38 RAM 6 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(shí)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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