- 您現在的位置：買賣IC網 > PDF目錄371046 > MC68B912B32 (Motorola, Inc.) 2.5V 100ppm/Degrees C, 50uA in SOT23-3 Series (Bandgap) Voltage Reference 3-SOT-23 -40 to 125 PDF資料下載
參數資料
| 型號： | MC68B912B32 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 2.5V 100ppm/Degrees C, 50uA in SOT23-3 Series (Bandgap) Voltage Reference 3-SOT-23 -40 to 125 |
| 中文描述： | 16位微控制器 |
| 文件頁數： | 13/128頁 |
| 文件大小： | 748K |
| 代理商： | MC68B912B32 |
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頁當前第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
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PDF資料 |
PDF描述 |
|---|---|
| MC68C912B32FU8 | 16-Bit Microcontroller |
| MC68B912B32FU8 | 16-Bit Microcontroller |
| MC68C912B32CFU8 | 16-Bit Microcontroller |
| MC68CK338 | Highly Integrated, Low-Power, 32-Bit Microcontroller |
| MC68EC060 | 32-Bit Microprocessors.(32位微處理器) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MC68B912B32FU8 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16-Bit Microcontroller |
| MC68BOOL | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-BIT MICROPROCESSING UNIT (MPU) |
| MC68BOOP | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-BIT MICROPROCESSING UNIT (MPU) |
| MC68BOOS | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-BIT MICROPROCESSING UNIT (MPU) |
| MC68C812A4 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Technical Supplement MC68C812A4 3.3V Electrical Characteristics |
發布緊急采購，3分鐘左右您將得到回復。