参数资料
型号: TSC2300IPAGRG4
厂商: TEXAS INSTRUMENTS INC
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP64
封装: GREEN, PLASTIC, TQFP-64
文件页数: 32/83页
文件大小: 1268K
代理商: TSC2300IPAGRG4
www.ti.com
TSC2300
SLAS372 — NOVEMBER 2002
In this mode, the TSC2300 detects when the touch panel is touched and causes the PENIRQ line to go low. The host
recognizes the interrupt request, and then writes to the A/D Converter Control register to select one of the touch screen
scan functions (single X-, Y-, or Z-conversions, continuous X/Y or X/Y/Z1/Z2 Conversions). The conversion process
then proceeds as described above, and as outlined in Figure 53 through Figure 57.
The main difference between this mode and the previous mode is that the host, not the TSC2300, decides when the
touch screen scan begins after responding to a PENIRQ. In this mode, the host must either monitor both PENIRQ and
DAV, or wait a minimum time after writing to the A/D converter control register. This wait time can be calculated from
Equations (5) in the case of single conversions, or from Equations (3) or (4) in the case of multiple conversions. The
nominal conversion times calculated by these equations should be extended by approximately 12% to account for
variation in the internal oscillator frequency.
38
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