Hitachi SH7760 Solution Engine2 Overview page 89

6.5.1 CPU Board Switch Control
(1) Power-on switch (SW1)
• When the SH7760 is being powered, a power-on switch interrupt occurs for the SH7760 if the power-on switch is
pressed and held for 2 seconds or more.
• When Solution Engine2 is OFF, it is turned ON if the power-on switch is pressed and held for 0.5 seconds or more.
• When Solution Engine2 is ON, it is turned OFF if the power-on switch is pressed and held for 2 seconds or more.
(2) Reset switch (SW2)
Solution Engine2 is turned OFF when the reset switch is pressed.
(3) NMI switch (SW3)
An NMI interrupt occurs for the SH7760 when the NMI switch is pressed.
6.5.2 LCD Board Switch Control (Application Switch)
(1) Cursor switch (SW1) and push-button switches (SW2 and SW3) on the LCD board
• The cursor switch and push-button switches are subject to sampling at intervals of 10msec. When consecutive three
samplings indicate that the same key is being pressed, key bit pattern data of the cursor switch and push-button
switches are output.
• If the switch is turned ON, a key ON interrupt occurs. If the switch is turned OFF, a key OFF interrupt occurs.
• When the same switch is pressed and held, an auto repeat interrupt occurs at intervals of 100 to 450msec (unit:
50msec).
86