HD404449 Datasheet, PDF (42/123 Pages) Hitachi Semiconductor – HD404449 SERIES

HD404449 Series
Input/Output
The MCU has 64 input/output pins (D₀–D₁₁, R0₀–RC₃) and 2 input pins (D₁₂, D₁₃). The features are
described below.
• 10 pins (D₀–D₉) are high-current input/output pins.
• The D₁₂, D₁₃, R0₀–R0₂, and R3₀–R5₃ 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 R4₃/SO₁ and R5₃/SO₂ pins can be set to
NMOS open-drain output by software.
• In stop mode, the MCU is reset, and therefore peripheral function selection is cancelled. Input/output
pins are in 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)
0
1
DCD, DCR
0
1
0
1
PDR
0
1
0
1
0
1
0
1
CMOS buffer PMOS
—
—
—
On
—
—
—
On
NMOS
—
—
On
—
—
—
On
—
Pull-up MOS
—
—
—
—
—
On
—
On
Note: — indicates off status.
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