- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98145 > ST7267C8T1/XXX (STMICROELECTRONICS) 16-BIT, MROM, 30 MHz, RISC MICROCONTROLLER, PQFP48 PDF資料下載
參數(shù)資料
| 型號(hào)： | ST7267C8T1/XXX |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, MROM, 30 MHz, RISC MICROCONTROLLER, PQFP48 |
| 封裝： | 7 X 7 MM, LEAD FREE, TQFP-48 |
| 文件頁數(shù)： | 107/189頁 |
| 文件大小： | 1643K |
| 代理商： | ST7267C8T1/XXX |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第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頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁當(dāng)前第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁第152頁第153頁第154頁第155頁第156頁第157頁第158頁第159頁第160頁第161頁第162頁第163頁第164頁第165頁第166頁第167頁第168頁第169頁第170頁第171頁第172頁第173頁第174頁第175頁第176頁第177頁第178頁第179頁第180頁第181頁第182頁第183頁第184頁第185頁第186頁第187頁第188頁第189頁
ST7267C8 ST7267R8
24/189
CENTRAL PROCESSING UNIT (Cont’d)
Condition Code Register (CC)
Read/Write
Reset Value: 111x1xxx
The 8-bit Condition Code register contains the in-
terrupt masks and four flags representative of the
result of the instruction just executed. This register
can also be handled by the PUSH and POP in-
structions.
These bits can be individually tested and/or con-
trolled by specific instructions.
Arithmetic Management Bits
Bit 4 = H Half carry.
This bit is set by hardware when a carry occurs be-
tween bits 3 and 4 of the ALU during an ADD or
ADC instructions. It is reset by hardware during
the same instructions.
0: No half carry has occurred.
1: A half carry has occurred.
This bit is tested using the JRH or JRNH instruc-
tion. The H bit is useful in BCD arithmetic subrou-
tines.
Bit 2 = N Negative.
This bit is set and cleared by hardware. It is repre-
sentative of the result sign of the last arithmetic,
logical or data manipulation. It’s a copy of the re-
sult 7th bit.
0: The result of the last operation is positive or null.
1: The result of the last operation is negative
(i.e. the most significant bit is a logic 1).
This bit is accessed by the JRMI and JRPL instruc-
tions.
Bit 1 = Z Zero.
This bit is set and cleared by hardware. This bit in-
dicates that the result of the last arithmetic, logical
or data manipulation is zero.
0: The result of the last operation is different from
zero.
1: The result of the last operation is zero.
This bit is accessed by the JREQ and JRNE test
instructions.
Bit 0 = C Carry/borrow.
This bit is set and cleared by hardware and soft-
ware. It indicates an overflow or an underflow has
occurred during the last arithmetic operation.
0: No overflow or underflow has occurred.
1: An overflow or underflow has occurred.
This bit is driven by the SCF and RCF instructions
and tested by the JRC and JRNC instructions. It is
also affected by the “bit test and branch”, shift and
rotate instructions.
Interrupt Management Bits
Bit 5,3 = I1, I0 Interrupt
The combination of the I1 and I0 bits gives the cur-
rent interrupt software priority.
These two bits are set/cleared by hardware when
entering in interrupt. The loaded value is given by
the corresponding bits in the interrupt software pri-
ority registers (IxSPR). They can be also set/
cleared by software with the RIM, SIM, IRET,
HALT, WFI and PUSH/POP instructions.
See the interrupt management chapter for more
details.
70
11
I1
H
I0
N
Z
C
Interrupt Software Priority
I1
I0
Level 0 (main)
1
0
Level 1
0
1
Level 2
0
Level 3 (= interrupt disable)
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST72774S9T1/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44 |
| ST72E734J6D0 | 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CDIP42 |
| ST72T774S9T1 | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP44 |
| ST7294C6B6 | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDIP28 |
| ST72T94C6M6 | 8-BIT, OTPROM, MICROCONTROLLER, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST72681/R12 | 制造商:STMicroelectronics 功能描述:CONTROLLER FOR HIGH-PERFORMANCE BUS-POWERED USB 2.0 FLASH DR - Trays |
| ST72681/S13 | 制造商:STMicroelectronics 功能描述:CONTROLLER FOR HIGH-PERFORMANCE - Trays |
| ST7271 | 制造商:Panasonic Industrial Company 功能描述:IC |
| ST7271N5B1-CLF | 制造商:STMicroelectronics 功能描述: |
| ST727X4-EMU2B | 制造商:STMicroelectronics 功能描述:REALTIME EMULATOR BOARD - Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。