C511 datasheet(59/128 Pages) SIEMENS

tên linh kiện	C511

Giải thích chi tiết về linh kiện	8-Bit CMOS Microcontroller

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Semiconductor Group

6-26

On-Chip Peripheral Units

Note: P1.1/T2EX is sampled during S5P2 of every machine cycle. The next increment/decrement

of timer 2 will be done during S3P1 in the next cycle.

6.2.2.2 Capture Mode

In the capture mode there are two options selected by bit EXEN2 in SFR T2CON.

If EXEN2 = 0, timer 2 is a 16-bit timer or counter which upon overflow sets bit TF2 in SFR T2CON.

This bit can be used to generate an interrupt.

If EXEN2 = 1, timer 2 still does the above, but with added feature that a 1-to-0 transition at external

input T2EX causes the current value in TH2 and TL2 to be captured into RC2H and RC2L,

respectively. In addition, the transition at T2EX causes bit EXF2 in SFR T2CON to be set. The EXF2

bit, like TF2, can generate an interrupt. The capture mode is illustrated in figure 6-25.

Figure 6-25

Timer 2 in Capture Mode

The baud rate generator mode is selected by RCLK = 1 and/or TCLK = 1 in SFR T2CON. It will be

described in conjunction with the serial port.

C511 bảng dữ liệu(PDF) 59 Page - Siemens Semiconductor Group