AT91SAM7S64 datasheet(29/42 Pages) ATMEL

29 / 42 page

6175BS–ATARM–04-Nov-05

AT91SAM7S Series Summary

10.9

Real-time Timer

• 32-bit free-running counter with alarm running on prescaled SCLK

• Programmable 16-bit prescaler for SLCK accuracy compensation

10.10 PIO Controller

• One PIO Controller, controlling 32 I/O lines (21 for AT91SAM7S32)

• Fully programmable through set/clear registers

• Multiplexing of two peripheral functions per I/O line

• For each I/O line (whether assigned to a peripheral or used as general-purpose I/O)

– Input change interrupt

– Half a clock period glitch filter

– Multi-drive option enables driving in open drain

– Programmable pull-up on each I/O line

– Pin data status register, supplies visibility of the level on the pin at any time

• Synchronous output, provides Set and Clear of several I/O lines in a single write

10.11 Voltage Regulator Controller

The aim of this controller is to select the Power Mode of the Voltage Regulator between Normal

Mode (bit 0 is cleared) or Standby Mode (bit 0 is set).

AT91SAM7S64 Datasheet(PDF) 29 Page - ATMEL Corporation