- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄371046 > MC68B912B32FU8 (MOTOROLA INC) 16-Bit Microcontroller PDF資料下載
參數(shù)資料
| 型號(hào)： | MC68B912B32FU8 |
| 廠商： | MOTOROLA INC |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 16-Bit Microcontroller |
| 中文描述： | 16-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | QFP-80 |
| 文件頁(yè)數(shù)： | 13/128頁(yè) |
| 文件大?。?/td> | 748K |
| 代理商： | MC68B912B32FU8 |
第1頁(yè)第2頁(yè)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)當(dāng)前第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)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)
MC68HC912B32
MC68HC912B32TS/D
MOTOROLA
13
3.3.8 External Address and Data Buses (ADDR[15:0] and DATA[15:0])
External bus pins share function with general-purpose I/O ports A and B. In single-chip operating
modes, the pins can be used for I/O; in expanded modes, the pins are used for the external buses.
In expanded wide mode, ports A and B are used for multiplexed 16-bit data and address buses. PA[7:0]
correspond to ADDR[15:8]/DATA[15:8]; PB[7:0] correspond to ADDR[7:0]/DATA[7:0].
In expanded narrow mode, ports A and B are used for the 16-bit address bus, and an 8-bit data bus is
multiplexed with the most significant half of the address bus on port A. In this mode, 16-bit data is han-
dled as two back-to-back bus cycles, one for the high byte followed by one for the low byte. PA[7:0]
correspond to ADDR[15:8] and to DATA[15:8] or DATA[7:0], depending on the bus cycle. The state of
the address pin should be latched at the rising edge of E. To allow for maximum address setup time at
external devices, a transparent latch should be used.
3.3.9 Read/Write (R/W)
In all modes this pin can be used as I/O and is a general-purpose input with an active pull-up out of
reset. If the read/write function is required it should be enabled by setting the RDWE bit in the PEAR
register. External writes will not be possible until enabled.
3.3.10 Low-Byte Strobe (LSTRB)
In all modes this pin can be used as I/O and is a general-purpose input with an active pull-up out of
reset. If the strobe function is required, it should be enabled by setting the LSTRE bit in the PEAR reg-
ister. This signal is used in write operations and so external low byte writes will not be possible until this
function is enabled. This pin is also used as TAGLO in special expanded modes and is multiplexed with
the LSTRB function.
3.3.11 Instruction Queue Tracking Signals (IPIPE1 and IPIPE0)
These signals are used to track the state of the internal instruction execution queue. Execution state is
time-multiplexed on the two signals. Refer to
16 Development Support
.
3.3.12 Data Bus Enable (DBE)
The DBE pin (PE7) is an active low signal that will be asserted low during E-clock high time. DBE pro-
vides separation between output of a multiplexed address and the input of data. When an external ad-
dress is stretched, DBE is asserted during what would be the last quarter cycle of the last E-clock cycle
of stretch. In expanded modes this pin is used to enable the drive control of external buses during ex-
ternal reads. Use of the DBE is controlled by the NDBE bit in the PEAR register. DBE is enabled out of
reset in expanded modes. This pin has an active pull-up during and after reset in single-chip modes.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68C912B32CFU8 | 16-Bit Microcontroller |
| MC68CK338 | Highly Integrated, Low-Power, 32-Bit Microcontroller |
| MC68EC060 | 32-Bit Microprocessors.(32位微處理器) |
| MC68EN360RC25V | QUad Integrated Communications Controller Users Manual |
| MC68EN360CFE25 | QUad Integrated Communications Controller Users Manual |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68BOOL | 制造商:MOTOROLA 制造商全稱(chēng):Motorola, Inc 功能描述:8-BIT MICROPROCESSING UNIT (MPU) |
| MC68BOOP | 制造商:MOTOROLA 制造商全稱(chēng):Motorola, Inc 功能描述:8-BIT MICROPROCESSING UNIT (MPU) |
| MC68BOOS | 制造商:MOTOROLA 制造商全稱(chēng):Motorola, Inc 功能描述:8-BIT MICROPROCESSING UNIT (MPU) |
| MC68C812A4 | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:Technical Supplement MC68C812A4 3.3V Electrical Characteristics |
| MC68C912B32CFU8 | 制造商:MOTOROLA 制造商全稱(chēng):Motorola, Inc 功能描述:16-Bit Microcontroller |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。