SAM7S256_14 Datasheet, PDF (32/775 Pages) ATMEL Corporation – ARM-based Flash MCU

9.8 Real-time Timer
z 32-bit free-running counter with alarm running on prescaled SCLK
z Programmable 16-bit prescaler for SLCK accuracy compensation
9.9 PIO Controller
z One PIO Controller, controlling 32 I/O lines (21 for SAM7S32/16)
z Fully programmable through set/clear registers
z Multiplexing of two peripheral functions per I/O line
z For each I/O line (whether assigned to a peripheral or used as general-purpose I/O)
z Input change interrupt
z Half a clock period glitch filter
z Multi-drive option enables driving in open drain
z Programmable pull-up on each I/O line
z Pin data status register, supplies visibility of the level on the pin at any time
z Synchronous output, provides Set and Clear of several I/O lines in a single write
9.10
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).
SAM7S Series [DATASHEET] 32
6175M–ATARM–26-Oct-12