APT7843 Ver la hoja de datos (PDF) - Anpec Electronics

Número de pieza

componentes Descripción

Fabricante

APT7843

Touch Screen Controller

Anpec Electronics 

APT7843

CS

DCLK

DIN

BUSY

DOUT

1

8

1

S

CONTROL BITS

8

1

8

1

S

CONTROL BITS

11 10 9 8 7 6 5

43210

11 10 9

FIGURE 6. Conversion Timing, 16-Clocks per Conversion, 8-bit Bus Interface. No DCLK Delay Required

with Dedicated Serial Port.

16-Clocks or 15-Clocks per Con-

version

The APT7843 will alow a conversion every 16 clock

cycles, as shown in Figure 6. This figure shows

possible serial communication occurring with other

serial peripherals between each byte transfer between

the processor and the converter.

Figure 7 provides the fastest way to clock the

APT7843. This method will not work with the serial

interface of most microcontrollers and digital signal

processors as they are generally not capable of pro-

viding 15 clock cycles per serial transfer. However,

this method could be used with field programmable

gate arrays (FPGAs) or application specific integrated

circuits (ASICs). (Note that this effectively increases

the maximum conversion rate of the converter).

AC Timing

Figure 8 and Table VI provide detailed timing of the

APT7843. Table VII provide detailed timing of low power

VCC=2.4V.

Copyright  ANPEC Electronics Corp.

11

Rev. A.8 - Apr., 2002

www.anpec.com.tw

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