RAiO RA8806 - Display Future
RAiO RA8806 - Display Future
RAiO RA8806 - Display Future
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Version 1.3<br />
<strong>RA8806</strong><br />
Two Layers Character/Graphic LCD Controller<br />
6-4-2 Manual Mode<br />
The “ Manual Mode” means that the operation process from “Touch event checking function” to<br />
“input Latch X data Y data”, the whole operation and setting process ( includes TPCR2[1:0]) and<br />
receiving data from XY coordinates are manual operated by programmer. The advantage of using<br />
Manual Mode is it allows programmer more flexible applications. In the condition that is over the<br />
range of <strong>RA8806</strong> register setting, the user can still use the software method to control the TP<br />
function in a correct way.<br />
Touch Event can be detected from “Interrupt Mode” or “Polling Mode” that depend on the system<br />
configuration. The difference between the “Interrupt Mode” and “Polling Mode” are explained as<br />
following.<br />
6-4-2-1 External Interrupt Mode<br />
Under the “Interrupt Mode” the touch event detecting way is almost the same as “ Auto Mode”. The<br />
major processes are list as follows:<br />
1. Enable Touch Panel function.<br />
2. Change mode to “Manual mode”.<br />
3. Set the switch to 「Wait for touch event 」, Set TPCR2[1:0] to 01b.<br />
4. When interrupt asserts, check if TP interrupt.<br />
5. If yes, change the switch to 「Latch X data」, Set TPCR2[1:0] to 10b, wait for enough time<br />
to make the latch data stable and latched to TPXR and TPZR.<br />
6. Change the switch to「Latch Y data」, Set TPCR2[1:0] to 11b, wait for enough time to<br />
make the latch data stable and latched to TPYR and TPZR.<br />
7. Read X, Y data from TPXR, TPYR and TPZR, and clear the interrupt status.<br />
The registers for Interrupt Mode are explained as below:<br />
Table 6-12<br />
Reg. Bit_Num Description Reference<br />
TPCR1 Bit 7 Enable Touch Panel function REG[C0h]<br />
TPCR2<br />
Bit 7<br />
Bit [1:0]<br />
TP Manual mode enable<br />
Mode selection for TP manual mode<br />
REG[C4h]<br />
INTR<br />
Bit 4<br />
Bit 0<br />
Touch Panel Interrupt Mask<br />
Touch Panel Detect Status bit<br />
REG[0Fh]<br />
TPXR Bit [7:0] Touch Panel X Data Bit[9:2](Segment) REG[C1h]<br />
TPYR Bit [7:0] Touch Panel Y Data Bit[9:2](Common) REG[C2h]<br />
TPZR<br />
Bit [3:2]<br />
Bit [1:0]<br />
Touch Panel Y Data Bit[1:0] (Common)<br />
Touch Panel X Data Bit[1:0] (Segment)<br />
REG[C3h]<br />
<strong>RAiO</strong> TECHNOLOGY INC. 45/193 www.raio.com.tw
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