TMP92xy21FG Toshiba, TMP92xy21FG Datasheet - Page 428

• Manufacturer Part Number: TMP92xy21FG
• Manufacturer: Toshiba

Specifications of TMP92xy21FG

• Package: LQFP144
• Rom Types(m=mask,p=otp, F=flash,e=eeprom): Romless
• Rom Combinations: Romless
• Ram Combinations: 16
• Architecture: 32-bit CISC
• Usb/spi Channels: -
• Uart/sio Channels: 2
• I2c/sio Bus Channels: -
• (s)dram Controller: 1
• Adc 10-bit Channel: 4
• Da Converter: -
• Timer 8-bit Channel: 4
• Timer 16-bit Channel: 1
• Pwm 8-bit Channels: -
• Pwm 16-bit Channels: -
• Cs/wait Controller: 4
• Dual Clock: Y
• Number Of I/o Ports: 82
• Power Supply Voltage(v): 3.0 to 3.6

3.19.3
Touch Detection Procedure
it is detected.
position measuring procedure is terminated, return to this procedure and wait for the next
touch.
(SMY, SPX and SMX).
switch is OFF.
resistors (PXD) between the X and Y directions in the touch screen are not connected and
INT4 is not generated.
resistors between the X and Y directions in the touch screen are connected and INT4 is
generated.
is used, as below.
after count, receive the signal internal. During counting, when the signal is set to Low,
counter is cleared. And the state become to state of waiting a rising edge.
The Touch detection procedure shows procedure until a pen is touched by the screen and
By touching, TSI generates interrupt (INT4) and this procedure terminates. After an X/Y
When the waiting state, make ON only the SPY switch ON and OFF the other 3 switches
The pull-down resistor that is connected to the P96/INT4/PX pin is ON when the SPX
During this waiting state, P96/INT4/PX pin’s level is L because the internal Pull-down
When the pen touches the screen, P96/INT4/PX pin’s level is H because the internal
In order to avoid the generation of several interrupts from one touch, a debounce circuit
This can ignore the pulse under the time which is set to TSICR1 register.
The circuit detects the rising of signal, counts-up the time of the counter which is set,
P96/INT4/PX pin
Figure 3.19.3 Block Diagram of Debounce Circuit
Debounce circuit
TSICR1
92CH21-426
TSICR0<TWIEN>, IIMC<I4EDGE>, P9FC<P96F>
selects the Rising edge or
F/F
Falling edge of INT4
Enables INT4 and
TMP92CH21
INT4
TSICR0
<PTST>
2009-06-19