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型號：	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
文件頁數：	152/1032頁
文件大?。?/td>	5750K
代理商：	M32185F4VFP

INPUT/OUTPUT PORTS AND PIN FUNCTIONS

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

8.2 Selecting Pin Functions

Each input/output port has double or triple functions shared with other internal peripheral I/O or external bus

interface related signal lines, or multiple functions shared with multi-function peripheral I/Os. Pin functions are

selected depending on the operation mode of the CPU or by setting the operation mode register and peripheral

function select register for the input/output port. (If any internal peripheral I/O has still another function, it is also

necessary to set the register provided for that internal peripheral I/O.)

P0–P4, P124, P125, P224 and P225, when the CPU is set to operate in processor mode, all are switched to

serve as signal pins for external access. The CPU operation mode is determined depending on how the MOD0

and MOD1 pins are set (see the table below).

Table 8.2.1 CPU Operation Modes and P0–P4, P124, P125, P224 and P225 Pin Functions

Operation Mode

P0–P4, P124, P125, P224 and P225 Pin Function

Single-chip mode

Input/output port pin

External extension mode

Input/output port or external bus interface signal pin (Note 1)

Processor mode

External bus interface signal pin

(Settings inhibited)

Note 1: P41–P43 only function as external bus interface signal pins.

Note: VCCE and VSS are connected to main power supply and GND, respectively.

Each input/output port has their functions switched between input/output port pins and internal peripheral I/O

pins by setting the respective port operation mode and peripheral function select registers. If any internal periph-

eral I/O has two or more pin functions, use the register provided for that internal peripheral I/O to select the

desired pin function.

Note that FP operations during internal flash memory programming do not affect the pin functions.

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