请根据以下内容帮我出一个分值为5分的题目并给出答案CPU's Hardwired Exception Processing 1. Finish current instruction (except for lengthy instructions) 2. Push context (8 32-bit words) onto current stack • xPSR, return address (PC), LR, R12, R3, R2, R1, R0 3. Switch to handler/privileged mode, set SP to MSP 4. Load PC with address of exception handler 5. Load LR with EXC_RETURN code 6. Load IPSR with exception number 7. Start executing code of exception handler 8. Usually 16 cycles from exception request to execution of first instruction in handler

题目：请简述CPU硬连线异常处理的步骤，并说明在处理过程中需要执行哪些操作。同时，从异常请求到第一个执行的指令需要多少个时钟周期？

答案：

CPU硬连线异常处理的步骤如下：

1. 完成当前指令（除了时间较长的指令）；
2. 将上下文（8个32位字）压入当前堆栈中，包括xPSR、返回地址(PC)、LR、R12、R3、R2、R1和R0；
3. 切换到处理程序/特权模式，将SP设置为MSP；
4. 将PC加载为异常处理程序的地址；
5. 将LR加载为EXC_RETURN代码；
6. 将IPSR加载为异常号；
7. 开始执行异常处理程序的代码；
8. 通常需要16个时钟周期从异常请求到执行处理程序的第一条指令。

以上是CPU硬连线异常处理的完整步骤及需要执行的操作。

相关问题

请根据以下内容帮我出一个分值为5分的题目一个问题3分一个问题2分，答案不能过长，并给出答案CPU's Hardwired Exception Processing 1. Finish current instruction (except for lengthy instructions) 2. Push context (8 32-bit words) onto current stack • xPSR, return address (PC), LR, R12, R3, R2, R1, R0 3. Switch to handler/privileged mode, set SP to MSP 4. Load PC with address of exception handler 5. Load LR with EXC_RETURN code 6. Load IPSR with exception number 7. Start executing code of exception handler 8. Usually 16 cycles from exception request to execution of first instruction in handler

题目1（3分）：CPU硬连线异常处理中需要压入堆栈的上下文信息有哪些？

答案1：CPU硬连线异常处理需要将以下8个32位字的上下文信息压入堆栈中：xPSR、返回地址（PC）、LR、R12、R3、R2、R1和R0。

题目2（2分）：从异常请求到执行处理程序的第一条指令通常需要多少个时钟周期？

答案2：通常需要16个时钟周期。

翻译Device configuration register The device has various configuration settings that are global in nature. The configuration settings are as follows: • When the 33978 is in the overvoltage region, a Logic [0] on the VBATP OV bit limits the wetting current on all input channels to 2 mA and the 33978 will not be able to enter into the Low-power mode. A Logic [1] allows the device to operate normally even in the overvoltage region. The OV flag will be set when the device enters in the OV region, regardless the value of the VBATP OV bit. • WAKE_B can be used to enable an external power supply regulator to supply the VDDQ voltage rail. When the WAKE_B VDDQ check bit is a Logic [0], the WAKE_B pin is expected to be pulled-up internally or externally to VDDQ and VDDQ is expected to go low, therefore the 33978 does not wake-up on the falling edge of WAKE_B. A Logic [1], assumes the user is using an external pull-up to VBATP or VDDQ (when VDDQ is not expected to be off) and the IC wakes up on a falling edge of WAKE_B. • INT_B out is used to select how the INT_B pin operates when an interrupt occurs. The IC is able to pulse low [1] or latch low [0]. • Aconfig[1-0] is used to determine the method of selecting the AMUX output, either a SPI command or using a hardwired setup using SG[3-1]. • Inputs SP0-7 may be programmable for switch-to-battery or switch-to-ground. These inputs types are defined using the settings command. To set a SPn input for switch-to-battery, a logic [1] for the appropriate bit must be set. To set a SPn input for switch-toground, a logic [0] for the appropriate bit must be set. The MCU may change or update the programmable switch register via software at any time in Normal mode. Regardless of the setting, when the SPn input switch is closed a logic [1] is placed in the serial output response register.

设备配置寄存器
该设备具有多种全局性质的配置设置。配置设置如下：
• 当33978处于过压区域时，VBATP OV位为逻辑[0]将所有输入通道的润湿电流限制为2 mA，并且33978无法进入低功耗模式。逻辑[1]允许设备即使在过压区域正常运行。当设备进入过压区域时，OV标志将被设置，而不管VBATP OV位的值如何。
• WAKE_B可用于启用外部电源调节器来供应VDDQ电压轨。当WAKE_B VDDQ检查位为逻辑[0]时，预期WAKE_B引脚会被内部或外部拉高到VDDQ，并且预期VDDQ会变低，因此33978不会在WAKE_B下降沿唤醒。逻辑[1]假设用户正在使用外部上拉到VBATP或VDDQ（当不希望VDDQ关闭时），并且IC在WAKE_B下降沿唤醒。
• INT_B out用于在发生中断时选择INT_B引脚的操作方式。IC能够脉冲低电平[1]或锁定低电平[0]。
• Aconfig [1-0]用于确定选择AMUX输出的方法，可以是SPI命令或使用硬连线设置使用SG [3-1]。
• 输入SP0-7可以编程为切换至电池或切换至地。这些输入类型使用设置命令进行定义。要将SPn输入设置为切换至电池，必须设置相应位的逻辑[1]。要将SPn输入设置为切换至地，必须设置相应位的逻辑[0]。MCU可以在正常模式下随时通过软件更改或更新可编程开关寄存器。无论设置如何，当SPn输入开关闭合时，逻辑[1]将放置在串行输出响应寄存器中。