BMSKTOPASA900(DCE) Toshiba, BMSKTOPASA900(DCE) Datasheet - Page 743

• Manufacturer Part Number: BMSKTOPASA900(DCE)
• Description: KIT STARTER TMPA900 USB JTAG
• Manufacturer: Toshiba
• Series: TOPASr
• Type: MCUr

Specifications of BMSKTOPASA900(DCE)

• Contents: Evaluation Board, Cable(s), Software and Documentation
• For Use With/related Products: TMPA900CMXBG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PD6/INTA
3.21.3
touched onto the touch screen and until the pen-touch is detected.
an X/Y position measuring at INTA interrupt routine, and an X/Y position measuring
procedure is terminated, return to this procedure to wait for the next touch.
three switches (SMY, SPX, SMX) to OFF. At this time, the pull-down resistor built in the
PD6/INTA/PX pin is set to ON.
connected, the PD6/INTA/PX pin is set to Low by the internal pull-down resistor (PXD),
generating no INTA interrupt.
screen are connected, which sets the PD6/INTA/PX pin to High and generates an INTA
interrupt.
circuit as shown below is provided. Setting de-bounce time in the TSICR1 register ignores
pulses whose time equals to or is below the set time.
and then captures the signal into the inside after counting. When the signal turns to “L”
during counting, the counter is cleared, starting to wait for a rising edge again.
Touch Detection Procedure
The touch detection procedure includes the procedures starting from when the pen is
Touching the screen generates the interrupt INTA and terminates this procedure. After
When waiting for a touch with no contact, set only the SPY switch to ON and set all other
In this state, because the internal X- and Y-direction resistors in the touch screen are not
When a next pen-touch is given, the X- and Y-direction internal resistors in the touch
To avoid generating more than one INTA interrupt by one pen-touch, the de-bounce
The de-bounce circuit detects a rising of signal to count up a set de-bounce counter time
AVCC3AD
GPIOD
ON (Pull Down)
50kΩ
AVSS3AD
OFF (SPX)
Figure 3.21.3 Block diagram of touch detection
Note: Supportable INTTSI rising edge interrupt
Input Enable
only by touch detection.
TENTATIVE
TMPA900CM- 742
INTTSI
TSICR0<PTST>
INTTA
De-bounce circuit
Block
PMC
TSICR0<TWIEN>
TSICR0<TSI7>
TSICR1
TSICR1<DBC7>
TSICR0<INGE>
GPIODFR2
0
1
Interrupt clear
GPIODIC<PD6IC>
GPIOD
1
0
Block
Interrupt
setting
TMPA900CM
Fixed low
<PD6F2>
2009-10-14
To interrupt controller
INTS [5]