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Section 18 Multi-Function Timer Pulse Unit (MTU)
Rev. 4.00 Sep. 14, 2005 Page 673 of 982
REJ09B0023-0400
18.9 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 to POE3 pin input, depending on the output status of the high-current
pins (TIOC3B/PTE[6], TIOC3D/PTE[4], TIOC4A/PTE[3], TIOC4B/PTE[2], TIOC4C/PTE[1],
TIOC4D/PTE[0]). It can also simultaneously generate interrupt requests.
18.9.1 Features
• Each of the POE0 to POE3 input pins can be set for falling edge, Pφ/8 × 16, Pφ/16 × 16, or
Pφ/128 × 16 low-level sampling.
• High-current pins can be set to high-impedance state by POE0 to 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.
• Interrupts can be generated by input-level sampling or output-level comparison results.