SH7041A datasheet(481/923 Pages) RENESAS

tên linh kiện	SH7041A

Giải thích chi tiết về linh kiện	Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)

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12.9

Port Output Enable (POE)

The port output enable (POE) can be used to establish a high-impedance state for high-current

pins, by changing the

POE0–POE3 pin input, depending on the output status of the high-current

pins (PE09/TIOC3B, PE11/TIOC3D, PE12/TIOC4A, PE13/TIOC4B/

MRES,

PE14/TIOC4C/DACK0/

AH, PE15/TIOC4D/DACK1/IRQOUT). It can also simultaneously

generate interrupt requests.

The high-current pins also become high-impedance regardless of whether these pin functions are

selected in cases such as when the oscillator stops or in standby mode. Refer to section 4, Clock

Pulse Generator (CPG), for details.

12.9.1

Features

• Each of the POE0–POE3 input pins can be set for falling edge, φ/8 × 16, φ/16 × 16, or φ/128 ×

16 low-level sampling.

• High-current pins can be set to high-impedance state by POE0–POE3 pin falling-edge or low-

level sampling.

• High-current pins can be set to high-impedance state when the high-current pin output levels

are compared and simultaneous low-level output continues for one cycle or more (except in the

33.3 MHz version).

• Interrupts can be generated by input-level sampling or output-level comparison results.

SH7041A bảng dữ liệu(PDF) 481 Page - Renesas Technology Corp