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參數(shù)資料
| 型號： | PIC16C56A-20I/JW |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, UVPROM, 20 MHz, RISC MICROCONTROLLER, CDIP18 |
| 封裝： | 0.300 INCH, WINDOWED, CERDIP-18 |
| 文件頁數(shù)： | 70/158頁 |
| 文件大?。?/td> | 1194K |
| 代理商： | PIC16C56A-20I/JW |
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PIC16C5X
DS30453C-page 19
Preliminary
2000 Microchip Technology Inc.
4.3
STATUS Register
This register contains the arithmetic status of the ALU,
the RESET status, and the page preselect bits for pro-
gram memories larger than 512 words.
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 and
MOVWF
instructions be used to alter the STATUS Regis-
ter because these instructions do not affect the Z, DC
or C bits from the STATUS Register. For other instruc-
tions which do affect STATUS Bits, see Section 8.0,
Instruction Set Summary.
REGISTER 4-1:
STATUS REGISTER (ADDRESS:03h)
R/W-0
R-1
R/W-x
PA2
PA1
PA0
TO
PD
Z
DC
C
R = Readable bit
W = Writable bit
- n = Value at POR reset
bit7
6
5
4
3
2
1
bit0
bit 7:
PA2: This bit unused at this time.
Use of the PA2 bit as a general purpose read/write bit is not recommended, since this may affect upward
compatibility with future products.
bit 6-5:
PA<1:0>: Program page preselect bits (PIC16C56/CR56)(PIC16C57/CR57)(PIC16C58/CR58)
00
= Page 0 (000h - 1FFh) - PIC16C56/CR56, PIC16C57/CR57, PIC16C58/CR58
01
= Page 1 (200h - 3FFh) - PIC16C56/CR56, PIC16C57/CR57, PIC16C58/CR58
10
= Page 2 (400h - 5FFh) - PIC16C57/CR57, PIC16C58/CR58
11
= Page 3 (600h - 7FFh) - PIC16C57/CR57, PIC16C58/CR58
Each page is 512 words.
Using the PA<1:0> bits as general purpose read/write bits in devices which do not use them for program
page preselect is not recommended since this may affect upward compatibility with future products.
bit 4:
TO: Time-out bit
1
= After power-up, CLRWDT instruction, or SLEEP instruction
0
= A WDT time-out occurred
bit 3:
PD: Power-down bit
1
= After power-up or by the CLRWDT instruction
0
= By execution of the SLEEP instruction
bit 2:
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
bit 1:
DC: Digit carry/borrow bit (for ADDWF and SUBWF instructions)
ADDWF
1
= A carry from the 4th low order bit of the result occurred
0
= A carry from the 4th low order bit of the result did not occur
SUBWF
1
= A borrow from the 4th low order bit of the result did not occur
0
= A borrow from the 4th low order bit of the result occurred
bit 0:
C: Carry/borrow bit (for ADDWF, SUBWF and RRF, RLF instructions)
ADDWF
SUBWF
RRF or RLF
1
= A carry occurred
1
= A borrow did not occur
Loaded with LSb or MSb, respectively
0
= A carry did not occur
0
= A borrow occurred
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIC16C56A20SO | 制造商:MICROCHIP 功能描述:New |
| PIC16C56A-40/P | 功能描述:8位微控制器 -MCU 1.5KB 25 RAM 12 I/O 40MHz 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 |
| PIC16C56A-40/SO | 功能描述:8位微控制器 -MCU 1.5KB 25 RAM 12 I/O 40MHz 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 |
| PIC16C56A-40/SS | 功能描述:8位微控制器 -MCU 1.5KB 25 RAM 12 I/O 40MHz SSOP20 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 |
| PIC16C56AT-04/SO | 功能描述:8位微控制器 -MCU 1.5KB 25 RAM 12 I/O 4 MHz 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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