M30600E8GP PDF资料下载(138/139 页)16-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PQFP100

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参数资料

型号：	M30600E8GP
元件分类：	微控制器/微处理器
英文描述：	16-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PQFP100
封装：	14 X 14 MM, 0.50 MM PITCH, PLASTIC, LQFP-100
文件页数：	138/139页
文件大小：	1782K
代理商：	M30600E8GP

Mitsubishi microcomputers

M16C / 60 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Programmable I/O Ports

Programmable I/O Ports

There are 87 programmable I/O ports: P0 to P10 (excluding P85). Each port can be set independently for

input or output using the direction register. A pull-up resistance for each block of 4 ports can be set. P85 is

an input-only port and has no built-in pull-up resistance.

Figures 1.84 and 1.85 show the configuration of the programmable I/O ports.

Each pin functions as a programmable I/O port and as the I/O for the built-in peripheral devices.

To use the pins as the inputs for the built-in peripheral devices, set the direction register of each pin to input

mode. When the pins are used as the outputs for the built-in peripheral devices (other than the D-A con-

verter), they function as outputs regardless of the contents of the direction registers. When pins are to be

used as the outputs for the D-A converter, do not set the direction registers to output mode. See the

descriptions of the respective functions for how to set up the built-in peripheral devices.

(1) Direction registers

Figure 1.86 shows a configuration of direction registers.

These registers are used to choose the direction of the programmable I/O ports. Each bit in these regis-

ters corresponds one for one to each I/O pin.

Note: There is no direction register bit for P85.

(2) Port registers

Figure 1.87 shows a configuration of port registers.

These registers are used to write and read data for input and output to and from an external device. A

port register consists of a port latch to hold output data and a circuit to read the status of a pin. Each bit

in port registers corresponds one for one to each I/O pin.

(3) Pull-up control registers

Figure 1.88 shows a configuration of pull-up control registers.

The pull-up control register can be set to apply a pull-up resistance to each block of 4 ports. When ports

are set to have a pull-up resistance, the pull-up resistance is connected only when the direction register is

set for input.

However, in memory expansion mode and microprocessor mode, P0 to P5 operate as the bus and the

pull-up control register setting is invalid.

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