HD404849FS datasheet(46/127 Pages) RENESAS

46 / 127 page

HD404849 Series

Input/Output

The MCU has 33 input/output pins (D

0–D8, R0–R3, R6, and R7) and two input pins (D10, D11).

The

features are described below.

• Nine pins (D

0–D8) are high-current input/output pins.

• The D

10, D11, R00–R02, R1–R3, R6, and R7 input/output pins are multiplexed with peripheral function

pins such as for the timers or serial interface. For these pins, the peripheral function setting is done

prior to the D or R port setting. Therefore, when a peripheral function is selected for a pin, the pin

function and input/output selection are automatically switched according to the setting.

• Input or output selection for input/output pins and port or peripheral function selection for multiplexed

pins are set by software.

• Peripheral function output pins are CMOS output pins. Only the R2

3/SO pin can be set to NMOS open-

drain output by software.

• In stop mode, the MCU is reset, and therefore peripheral function selection is cancelled. The data

control register (DCD, DCR) is also reset, so input/output pins go to the high-impedance state.

• Each input/output pin has a built-in pull-up MOS, which can be individually turned on or off by

software.

I/O buffer configuration is shown in figure 28, programmable I/O circuits are listed in table 23, and I/O pin

circuit types are shown in table 24.

Table 23 Programmable I/O Circuits

MIS3 (bit 3 of MIS)

DCD, DCR

PDR

01010

101

CMOS buffer

PMOS

———On

—

——On

NMOS

—

Pull-up MOS

—————

—On

Note:

— indicates off status.

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