ra8806 RAIO Technology Inc., ra8806 Datasheet - Page 54

• Manufacturer Part Number: ra8806
• Description: Two Layers Character/graphic Lcd Controller
• Manufacturer: RAIO Technology Inc.

Preliminary Version 1.2
RAiO
TECHNOLOGY INC.
Besides, in the Sleep Mode, RA8806 allows the “Wake-up on Keystroke” function, if any key is pressed,
the System Clock starts to oscillate, and de-bounce to check if the wake-up event is legal. If legal then
after two Frame time, the Display on the panel will be lighted, then system will recover from the Sleep
Mode. If not legal, the system clock is off again and keeps on the Sleep mode. Please refer to the
description of “Power Mode” for the detail introduction of “Sleep Mode”. The settings for Wake-up
function are explained as follows:
Enabling the Key-Scan functions, programmer cans uses following methods to check keystroke.
Please be aware that the status of Key-Scan (Bit-1 of INTR) has been set to “1” no matter which method
is used, programmer have to clear the status to 0 after reading the correct Key Code, otherwise the
interrupt will be kept that no more interrupt is visible again.
1) Software check method: to know the key be pressed from keeping check the status of Key-Scan
2) Hardware check method: to know the key be pressed from external interrupt signal
KSCR2
INTR
Reg.
Bit_Num
Bit 7
Bit 6
Bit 2
Enable Key-Scan wake-up function
Wake-up interrupt enable bit
Wake-up Interrupt Status bit
(Bit-1 of INTR)
Table 6-17
Description
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Two Layers Character/Graphic LCD Controller
Reference
REG[A1h]
REG[0Fh]
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RA8806