參數(shù)資料
型號： PIC16F819
廠商： Microchip Technology Inc.
英文描述： 18/20-Pin Enhanced FLASH Microcontrollers with nanoWatt Technology(18/20引腳，納瓦技術(shù)增強FLASH微控制器)
中文描述： 18/20-Pin增強型閃存微控制器采用納瓦技術(shù)（18/20引腳，納瓦技術(shù)增強閃存微控制器）
文件頁數(shù)： 18/164頁
文件大?。?/td> 3045K
代理商： PIC16F819
PIC16F818/819
DS39598C-page 16
Preliminary
2002 Microchip Technology Inc.
2.2.2.1
STATUS Register
The STATUS register, shown in Register 2-1, contains
the arithmetic status of the ALU, the RESET status and
the bank select bits for data memory.
The STATUS register can be the destination for any
instruction, as with any other register. If the STATUS
register is the destination for an instruction that affects
the Z, DC or C bits, then the write to these three bits is
disabled. These bits are set or cleared according to the
device logic. Furthermore, the TO and PD bits are not
writable. Therefore, the result of an instruction with the
STATUS register as destination may be different than
intended.
For example,
CLRF STATUS
will clear the upper three
bits and set the Z bit. This leaves the STATUS register
as ‘
000u u1uu
’ (where
u
= unchanged).
It is recommended, therefore, that only
BCF, BSF,
SWAPF
and
MOVWF
instructions are used to alter the
STATUS register, because these instructions do not
affect the Z, C or DC bits from the STATUS register. For
other instructions not affecting any status bits, see
Section 13.0, "Instruction Set Summary".
REGISTER 2-1:
STATUS REGISTER (ADDRESS 03h, 83h, 103h, 183h)
R/W-0
R/W-0
R/W-0
IRP
RP1
RP0
bit 7
Note:
The C and DC bits operate as a borrow
and digit borrow bit, respectively, in sub-
traction. See the
SUBLW
and
SUBWF
instructions for examples.
R-1
TO
R-1
PD
R/W-x
Z
R/W-x
DC
R/W-x
C
bit 0
bit 7
IRP:
Register Bank Select bit (used for indirect addressing)
1
= Bank 2, 3 (100h - 1FFh)
0
= Bank 0, 1 (00h - FFh)
RP<1:0>:
Register Bank Select bits (used for direct addressing)
11
= Bank 3 (180h - 1FFh)
10
= Bank 2 (100h - 17Fh)
01
= Bank 1 (80h - FFh)
00
= Bank 0 (00h - 7Fh)
Each bank is 128 bytes
TO:
Time-out bit
1
= After power-up,
CLRWDT
instruction, or
SLEEP
instruction
0
= A WDT time-out occurred
PD:
Power-down bit
1
= After power-up or by the
CLRWDT
instruction
0
= By execution of the
SLEEP
instruction
Z:
Zero bit
1
= The result of an arithmetic or logic operation is zero
0
= The result of an arithmetic or logic operation is not zero
DC:
Digit carry/borrow bit (
ADDWF
,
ADDLW
,
SUBLW
and
SUBWF
instructions)
(1)
1
= A carry-out from the 4th low order bit of the result occurred
0
= No carry-out from the 4th low order bit of the result
C:
Carry/borrow bit (
ADDWF
,
ADDLW
,
SUBLW
and
SUBWF
instructions)
(1,2)
1
= A carry-out from the Most Significant bit of the result occurred
0
= No carry-out from the Most Significant bit of the result occurred
bit 6-5
bit 4
bit 3
bit 2
bit 1
bit 0
Note 1:
For borrow, the polarity is reversed. A subtraction is executed by adding the two’s
complement of the second operand.
2:
For rotate (
RRF
,
RLF
) instructions, this bit is loaded with either the high or low order
bit of the source register.
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
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參數(shù)描述
PIC16F819-E/ML 功能描述:8位微控制器 -MCU 3.5KB 256 RAM 16 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 安裝風格:SMD/SMT
PIC16F819-E/P 功能描述:8位微控制器 -MCU 3.5KB 256 RAM 16 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 安裝風格:SMD/SMT
PIC16F819-E/SO 功能描述:8位微控制器 -MCU 3.5KB 256 RAM 16 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 安裝風格:SMD/SMT
PIC16F819-E/SS 功能描述:8位微控制器 -MCU 3.5KB 256 RAM 16 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 安裝風格:SMD/SMT
PIC16F819-E/SSVAO 制造商:Microchip Technology Inc 功能描述:
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