AT91SAM7S64 datasheet(38/42 Pages) ATMEL

38 / 42 page

6175BS–ATARM–04-Nov-05

AT91SAM7S Series Summary

– Three output compare or two input capture

• Wide range of functions including:

– Frequency measurement

– Event counting

– Interval measurement

– Pulse generation

– Delay timing

– Pulse Width Modulation

– Up/down capabilities

• Each channel is user-configurable and contains:

– Three external clock inputs

– Five internal clock inputs, as defined in Table 11-5

– Two multi-purpose input/output signals

– Two global registers that act on all three TC channels

11.10 PWM Controller

• Four channels, one 16-bit counter per channel

• Common clock generator, providing thirteen different clocks

– One Modulo n counter providing eleven clocks

– Two independent linear dividers working on modulo n counter outputs

• Independent channel programming

– Independent enable/disable commands

– Independent clock selection

– Independent period and duty cycle, with double bufferization

– Programmable selection of the output waveform polarity

– Programmable center or left aligned output waveform

11.11 USB Device Port (Only on AT91SAM7S256/128/64/321)

• USB V2.0 full-speed compliant,12 Mbits per second.

• Embedded USB V2.0 full-speed transceiver

• Embedded 328-byte dual-port RAM for endpoints

• Four endpoints

Table 11-5.

Timer Counter Clocks Assignment

TC Clock Input

Clock

TIMER_CLOCK1

MCK/2

TIMER_CLOCK2

MCK/8

TIMER_CLOCK3

MCK/32

TIMER_CLOCK4

MCK/128

TIMER_CLOCK5

MCK/1024

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