- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄369923 > MPC505 (MOTOROLA INC) Highly Integrated, Low-Power, 32-Bit Microcontroller PDF資料下載
參數(shù)資料
| 型號(hào)： | MPC505 |
| 廠商： | MOTOROLA INC |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | Highly Integrated, Low-Power, 32-Bit Microcontroller |
| 中文描述： | 32-BIT, RISC MICROCONTROLLER, PQFP16 |
| 文件頁(yè)數(shù)： | 5/12頁(yè) |
| 文件大?。?/td> | 68K |
| 代理商： | MPC505 |
Application Note
Initialization Example
AN1281
MOTOROLA
5
Initialization Example
Table 3
shows steps used to initialize interrupts during a reset routine.
Keep in mind that after reset, most processor resources like the floating
point unit, interrupts, etc. are disabled.
Configure IRQ Pins
as Interrupts and
Assign Sensitivity
The IRQ pins can be used to make interrupt service requests or for
general-purpose input/output. Pin use is determined by the port Q pin
assignment register (PQPAR). PQPAR contains two 2-bit configuration
fields for each pin.
The port Q pin assignment (PQPA) field determines whether a pin is
used for general-purpose input, for general-purpose output, for interrupt
requests to the RCPU, or for interrupt requests to the interrupt controller.
The port Q edge (PQEDGE) field determines whether an interrupt pin is
level-sensitive, falling-edge sensitive, rising-edge sensitive, or rising-
and-falling edge sensitive.
Pins that are configured for interrupt requests to the RCPU bypass the
interrupt controller completely, and cannot be assigned an interrupt level
or individually enabled and disabled. It is assumed that most users will
configure pins for interrupt requests to the interrupt controller.
Assign Interrupt
Levels
In this example the assignable levels are also used as priorities. The
PIT/port Q interrupt levels (PITQIL) register is used to set up the levels.
Five bits per interrupt are used to assign a level between 0 and 31 for
the PIT and pins IRQ0, IRQ1, and IRQ2.
Table 3. Interrupt Initialization
Step
Action
Registers Used
1
Configure IRQ pins as interrupts and assign sensitivity
PQPAR
2
Assign interrupt levels
PITQIL
3
Initialize PIT
PIT
4
Enable individual interrupts
IRQENABLE
5
Enable external interrupts
EIE
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MPC509 | Highly Integrated, Low-Power, 32-Bit Microcontroller |
| MPC5200BV400 | MPC5200 Hardware Specifications |
| MPC5200CBV266 | MPC5200 Hardware Specifications |
| MPC5200CBV400 | MPC5200 Hardware Specifications |
| MPC5200ID | MPC5200 Hardware Specifications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MPC506 | 制造商:BB 制造商全稱(chēng):BB 功能描述:Single-Ended 16-Channel/Differential 8-Channel CMOS ANALOG MULTIPLEXERS |
| MPC506A | 制造商:BB 制造商全稱(chēng):BB 功能描述:Single-Ended 16-Channel/Differential 8-Channel CMOS ANALOG MULTIPLEXERS |
| MPC506AP | 功能描述:多路器開(kāi)關(guān) IC 16Ch Sgl-Ended Input Ana Multipl RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 開(kāi)關(guān)數(shù)量:4 開(kāi)啟電阻（最大值）:7 Ohms 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 傳播延遲時(shí)間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UQFN-16 |
| MPC506AP | 制造商:BURR-BROWN 功能描述:IC MUX 16CH SP DIP28 506 制造商:Texas Instruments 功能描述:Multiplexer IC |
| MPC506AP | 制造商:Texas Instruments 功能描述:IC MUX 16CH SP DIP28 506 制造商:Texas Instruments 功能描述:IC, MUX 16CH SP, DIP28, 506 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。