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型號(hào)：	M32185F4VFP
元件分類：	微控制器/微處理器
英文描述：	32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP144
封裝：	20 X 20 MM, 0.50 MM PITCH, PLASTIC, LQFP-144
文件頁(yè)數(shù)：	52/1032頁(yè)
文件大?。?/td>	5750K
代理商：	M32185F4VFP

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

4.8 Exception Processing

Figure 4.8.2 Example of a Return Address for Address Exception (AE)

(4) Branching to the EIT vector entry

The CPU branches to the address H’0000 0030 in the user space. This is the last operation performed

in hardware preprocessing.

(5) Jumping from the EIT vector entry to the user-created handler

The CPU executes the BRA instruction written by the user at the address H’0000 0030 of the EIT

vector entry to jump to the start address of the user-created handler. At the beginning of the user-

created EIT handler, first save the BPC and PSW registers and the necessary general-purpose regis-

ters to the stack. Also, save the accumulator and FPSR register as necessary.

(6) Returning from the EIT handler

At the end of the EIT handler, restore the saved registers from the stack and execute the RTE instruc-

tion. When the RTE instruction is executed, hardware postprocessing is automatically performed. At

this time, the CPU restarts from a word-boundary instruction including the instruction that generated

an AE (see Figure 4.8.2). Except when using address exceptions intentionally, occurrence of an ad-

dress exception suggests that the system has some fatal fault already existing in it. In such a case,

therefore, do not return from the address exception handler to the program that was being executed

when the exception occurred.

4.8.3 Floating-Point Exception (FPE)

[Occurrence Conditions]

Floating-Point Exception (FPE) occurs when Unimplemented Exception (UIPL) or one of the five exceptions

specified in IEEE 754 standards (OVF, UDF, IXCT, DIV0 or IVLD) is detected.

Note, however, that the EIT processing described below is executed only when the exception that occurred

is one whose exception enable bit in the FPSR register is set to "1" or an unimplemented exception.

[EIT Processing]

(1) Saving SM, IE and C bits

The PSW register’s SM, IE and C bits are saved to the respective backup bits: BSM, BIE and BC.

(2) Updating SM, IE and C bits

The PSW register’s SM, IE and C bits are updated as shown below.

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
M32186F8VFP	制造商:Renesas Electronics Corporation 功能描述:
M3219	功能描述:電纜固定件和配件 LTCG PG-16 BLACK With 3173 NUT RoHS:否制造商:Heyco 類型:Cable Grips, Liquid Tight 材料:Nylon 顏色:Black 安裝方法:Cable 最大光束直徑:11.4 mm 抗拉強(qiáng)度:
M32192F8TFP#U0	制造商:Renesas Electronics Corporation 功能描述:MCU 32-bit M32R RISC 1024KB Flash 3.3V/5V 144-Pin LQFP
M32192F8VFP	制造商:Renesas Electronics Corporation 功能描述:
M321-SERIES	制造商:未知廠家制造商全稱:未知廠家功能描述:Peripheral IC

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