- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄45201 > MB9AF312NPF 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP100 PDF資料下載
參數(shù)資料
| 型號(hào)： | MB9AF312NPF |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP100 |
| 封裝： | 0.65 MM PITCH, PLASTIC, LQFP-100 |
| 文件頁(yè)數(shù)： | 3/114頁(yè) |
| 文件大?。?/td> | 1357K |
| 代理商： | MB9AF312NPF |
第1頁(yè)第2頁(yè)當(dāng)前第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)
ATmega48PA/88PA/168PA [DATASHEET]
9223F–AVR–04/14
100
16.3
Accessing 16-bit Registers
The TCNT1, OCR1A/B, and ICR1 are 16-bit registers that can be accessed by the AVR CPU via the 8-bit data bus. The
16-bit register must be byte accessed using two read or write operations. Each 16-bit timer has a single 8-bit register for
temporary storing of the high byte of the 16-bit access. The same temporary register is shared between all 16-bit registers
within each 16-bit timer. Accessing the low byte triggers the 16-bit read or write operation. When the low byte of a 16-bit
register is written by the CPU, the high byte stored in the temporary register, and the low byte written are both copied into the
16-bit register in the same clock cycle. When the low byte of a 16-bit register is read by the CPU, the high byte of the 16-bit
register is copied into the temporary register in the same clock cycle as the low byte is read.
Not all 16-bit accesses uses the temporary register for the high byte. Reading the OCR1A/B 16-bit registers does not involve
using the temporary register.
To do a 16-bit write, the high byte must be written before the low byte. For a 16-bit read, the low byte must be read before the
high byte.
The following code examples show how to access the 16-bit timer registers assuming that no interrupts updates the
temporary register. The same principle can be used directly for accessing the OCR1A/B and ICR1 registers. Note that when
using “C”, the compiler handles the 16-bit access.
It is important to notice that accessing 16-bit registers are atomic operations. If an interrupt occurs between the two
instructions accessing the 16-bit register, and the interrupt code updates the temporary register by accessing the same or
any other of the 16-bit timer registers, then the result of the access outside the interrupt will be corrupted. Therefore, when
both the main code and the interrupt code update the temporary register, the main code must disable the interrupts during
the 16-bit access.
Assembly Code Examples(1)
...
; Set TCNT
1 to 0x01FF
ldi
r17,0x01
ldi
r16,0xFF
out
TCNT
1H,r17
out
TCNT
1L,r16
; Read TCNT
1 into r17:r16
in
r16,TCNT
1L
in
r17,TCNT
1H
...
C Code Examples(1)
unsigned int
i;
...
/* Set TCNT
1 to 0x01FF */
TCNT
1 = 0x1FF;
/* Read TCNT
1 into i */
i = TCNT
1;
...
Note:
1.
For I/O registers located in extended I/O map, “IN”, “OUT”, “SBIS”, “SBIC”, “CBI”, and “SBI” instructions
must be replaced with instructions that allow access to extended I/O. Typically “LDS” and “STS” combined
with “SBRS”, “SBRC”, “SBR”, and “CBR”.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB9AF312LPMC1 | 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP64 |
| MB9AF312MPMC | 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP80 |
| MB9AF312LPMC | 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP64 |
| MB9AF311NPMC | 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP100 |
| MB9AF316NPMC | RISC MICROCONTROLLER, PQFP100 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB9AF314LAPMC1-G-JNE2 | 制造商:FUJITSU 功能描述: |
| MB9AF314LAPMC-G-JNE2 | 制造商:Fujitsu 功能描述:Bulk |
| MB9AF314LAQN-G-AVE2 | 功能描述:ARM? Cortex?-M3 FM3 MB9A310A Microcontroller IC 32-Bit 40MHz 256KB (256K x 8) FLASH 64-QFN Exposed Pad (9x9) 制造商:cypress semiconductor corp 系列:FM3 MB9A310A 包裝:托盤(pán) 零件狀態(tài):有效 核心處理器:ARM? Cortex?-M3 核心尺寸:32-位 速度:40MHz 連接性:CSIO，I2C，LIN，UART/USART，USB 外設(shè):DMA，LVD，POR，PWM，WDT I/O 數(shù):51 程序存儲(chǔ)容量:256KB（256K x 8） 程序存儲(chǔ)器類(lèi)型:閃存 EEPROM 容量:- RAM 容量:32K x 8 電壓 - 電源（Vcc/Vdd）:2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 9x12b 振蕩器類(lèi)型:內(nèi)部 工作溫度:-40°C ~ 105°C（TA） 封裝/外殼:64-VFQFN 裸露焊盤(pán) 供應(yīng)商器件封裝:64-QFN 裸露焊盤(pán)（9x9） 標(biāo)準(zhǔn)包裝:260 |
| MB9AF314LPMC1-ESE1 | 制造商:FUJITSU 功能描述: |
| MB9AF314LPMC1-GE1 | 制造商:FUJITSU 功能描述: |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。