AT91SAM7SE256 ATMEL [ATMEL Corporation], AT91SAM7SE256 Datasheet - Page 33

• Manufacturer Part Number: AT91SAM7SE256
• Description: Product Description
• Manufacturer: ATMEL [ATMEL Corporation]

9.5
9.6
9.7
9.8
9.9
6222ES–ATARM–15-Dec-09
Debug Unit
Periodic Interval Timer
Watchdog Timer
Real-time Timer
PIO Controllers
• Comprises:
• Two-pin UART
• Debug Communication Channel Support
• Chip ID Registers
• 20-bit programmable counter plus 12-bit interval counter
• 12-bit key-protected Programmable Counter running on prescaled SLCK
• Provides reset or interrupt signals to the system
• Counter may be stopped while the processor is in debug state or in idle mode
• 32-bit free-running counter with alarm running on prescaled SLCK
• Programmable 16-bit prescaler for SLCK accuracy compensation
• Three PIO Controllers. PIO A and B each control 32 I/O lines and PIO C controls 24 I/O lines.
• 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)
– One two-pin UART
– One Interface for the Debug Communication Channel (DCC) support
– One set of Chip ID Registers
– One Interface providing ICE Access Prevention
– USART-compatible User Interface
– Programmable Baud Rate Generator
– Parity, Framing and Overrun Error
– Automatic Echo, Local Loopback and Remote Loopback Channel Modes
– Offers visibility of COMMRX and COMMTX signals from the ARM Processor
– Identification of the device revision, sizes of the embedded memories, set of
– Chip ID is 0x272A 0A40 (VERSION 0) for AT91SAM7SE512
– Chip ID is 0x272A 0940 (VERSION 0) for AT91SAM7SE256
– Chip ID is 0x2728 0340 (VERSION 0) for AT91SAM7SE32
– 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
AT91SAM7SE512/256/32 Preliminary Summary
peripherals
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