- 您現在的位置：買賣IC網 > PDF目錄371046 > MC68B912B32FU8 (MOTOROLA INC) 16-Bit Microcontroller PDF資料下載
參數資料
| 型號： | MC68B912B32FU8 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 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 |
| 文件頁數： | 35/128頁 |
| 文件大小： | 748K |
| 代理商： | MC68B912B32FU8 |
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頁當前第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
35
In special single-chip mode, the E clock is enabled as a timing reference and the other bits of port E are
configured for general-purpose I/O.
In normal expanded modes, the reset vector is located in external memory. The E clock may be required
for this access but R/W is only needed by the system when there are external writable resources. There-
fore in normal expanded modes, only the E clock is configured for its alternate bus control function and
the other bits of port E are configured for general-purpose I/O. If the normal expanded system needs
any other bus-control signals, PEAR would need to be written before any access that needed the addi-
tional signals.
In special expanded modes, IPIPE1, IPIPE0, E, R/W, and LSTRB are configured as bus-control signals.
In peripheral mode, the PEAR register is not accessible for reads or writes.
NDBE — No Data Bus Enable
Read and write anytime.
0 = PE7 is used for external control of data enables on memories.
1 = PE7 is used for general-purpose I/O.
PIPOE — Pipe Signal Output Enable
Normal: write once; Special: write anytime except the first time. Read anytime. This bit has no effect in
single chip modes.
0 = PE[6:5] are general-purpose I/O.
1 = PE[6:5] are outputs and indicate the state of the instruction queue.
NECLK — No External E Clock
In expanded modes, writes to this bit have no effect. E clock is required for de-multiplexing the external
address; NECLK will remain zero in expanded modes. NECLK can be written once in normal single-
chip mode and can be written anytime in special single chip mode. The bit can be read anytime.
0 = PE4 is the external E-clock pin subject to the following limitation: In single-chip modes, PE4 is
general-purpose I/O unless NECLK = 0 and either IVIS = 1 or ESTR = 0. A 16-bit write to
PEAR:MODE can configure all three bits in one operation.
1 = PE4 is a general-purpose I/O pin.
LSTRE — Low Strobe (LSTRB) Enable
Normal: write once; Special: write anytime except the first time. Read anytime. This bit has no effect in
single-chip modes or normal expanded narrow mode.
0 = PE3 is a general-purpose I/O pin.
1 = PE3 is configured as the LSTRB bus-control output, provided the MCU is not in single chip or
normal expanded narrow modes.
LSTRB is used during external writes. After reset in normal expanded mode, LSTRB is disabled. If
needed, it should be enabled before external writes. External reads do not normally need LSTRB be-
cause all 16 data bits can be driven even if the MCU only needs eight bits of data.
TAGLO is a shared function of the PE3/LSTRB pin. In special expanded modes with LSTRE set and the
BDM instruction tagging on, a zero at the falling edge of E tags the instruction word low byte being read
into the instruction queue.
RDWE — Read/Write Enable
Normal: write once; Special: write anytime except the first time. Read anytime. This bit has no effect in
single-chip modes.
0 = PE2 is a general-purpose I/O pin.
1 = PE2 is configured as the R/W pin. In single-chip modes, RDWE has no effect and PE2 is a gen-
eral-purpose I/O pin.
R/W is used for external writes. After reset in normal expanded mode, it is disabled. If needed it should
be enabled before any external writes.
相關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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
| MC68C912B32CFU8 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16-Bit Microcontroller |
發布緊急采購，3分鐘左右您將得到回復。