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您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄377927 > MB90V560 (Fujitsu Limited) 16-BIT MICROCONTROLLER PDF資料下載

型號(hào)：	MB90V560
廠商：	Fujitsu Limited
英文描述：	16-BIT MICROCONTROLLER
中文描述：	16位微控制器
文件頁(yè)數(shù)：	226/581頁(yè)
文件大?。?/td>	3144K
代理商：	MB90V560

CHAPTER 8 I/O PORTS

MB90560 series

8.7.1 Port 4 Registers (PDR4 and DDR4)

This section describes the port 4 registers.

Functions of Port 4 Registers

Port 4 data register (PDR4)

The PDR4 register indicates the state of each pin of port 4.

Port 4 data direction register (DDR4)

The DDR4 register specifies the direction of a data flow (input or output) at each pin (bit) of

port 4. When a DDR4 register bit is “1”, the corresponding port (pin) is set as an output port.

When the bit is “0”, the port (pin) is set as an input port.

When a peripheral function having output pins is used, the port functions as peripheral

function output pins regardless of the value in the DDR4 register as long as the peripheral

function output enable bit corresponding to the pins is set.

To use a peripheral function having input pins, reset the DDR4 register bit corresponding

to each peripheral function input pin to “0” to place the port in input mode.

Table 8.7-3 lists the functions of the port 4 registers.

Table 8.7-3 Port 4 register functions

R/W : Read/write enabled

During writing

Initial value

The pin is at

the low level.

The output latch is loaded with “0”. When

the pin functions as an output port, the pin

is set to the low level.

The pin is at

The output latch is loaded with “1”. When

the pin functions as an output port, the pin

is set to the high level.

direction register

The direction

latch is “0”.

The output buffer is turned off to place the

port in input mode.

The direction

latch is “1”.

The output buffer is turned on to place the

port in output mode.

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
MB-910	制造商:Circuit Test 功能描述:BREADBOARD WIRING KIT - 350 PCS
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MB9100-100	制造商:COM/DUO 功能描述:FAN 4-6WKS
MB91101	制造商:Panasonic Industrial Company 功能描述:IC
MB91101A	制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit RISC Microcontroller

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