AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 3

• Manufacturer Part Number: AT91SAM7S256D-AU
• Description: ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
• Manufacturer: Atmel
• Series: SAM7S256r

Specifications of AT91SAM7S256D-AU

• Rohs: yes
• Core: ARM
• Processor Series: AT91SAM
• Data Bus Width: 16 bit/32 bit
• Maximum Clock Frequency: 55 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: LQFP-64
• Mounting Style: SMD/SMT
• Interface Type: 2-Wire, I2S, SPI, USART
• Length: 7 mm

•
•
1.
1.1
Table 1-1.
Notes: 1. Fractional Baud Rate.
Device
SAM7S512
SAM7S256
SAM7S128
SAM7S64
SAM7S321
SAM7S32
SAM7S161
SAM7S16
Fully Static Operation: Up to 55 MHz at 1.65V and 85° C Worst Case Conditions
Available in 64-lead LQFP Green or 64-pad QFN Green Package (SAM7S512/256/128/64/321/161) and 48-lead LQFP Green or
48-pad QFN Green Package (SAM7S32/16)
Description
Atmel’s SAM7S is a series of low pincount Flash microcontrollers based on the 32-bit ARM RISC processor. It fea-
tures a high-speed Flash and an SRAM, a large set of peripherals, including a USB 2.0 device (except for the
SAM7S32 and SAM7S16), and a complete set of system functions minimizing the number of external components.
The device is an ideal migration path for 8-bit microcontroller users looking for additional performance and
extended memory.
The embedded Flash memory can be programmed in-system via the JTAG-ICE interface or via a parallel interface
on a production programmer prior to mounting. Built-in lock bits and a security bit protect the firmware from acci-
dental overwrite and preserves its confidentiality.
The SAM7S Series system controller includes a reset controller capable of managing the power-on sequence of
the microcontroller and the complete system. Correct device operation can be monitored by a built-in brownout
detector and a watchdog running off an integrated RC oscillator.
The SAM7S Series are general-purpose microcontrollers. Their integrated USB Device port makes them ideal devices
for peripheral applications requiring connectivity to a PC or cellular phone. Their aggressive price point and high level of
integration pushes their scope of use far into the cost-sensitive, high-volume consumer market.
Configuration Summary of the SAM7S512, SAM7S256, SAM7S128, SAM7S64, SAM7S321,
SAM7S32, SAM7S161 and SAM7S16
The SAM7S512, SAM7S256, SAM7S128, SAM7S64, SAM7S321, SAM7S32, SAM7S161 and SAM7S16 differ in
memory size, peripheral set and package.
Except for the SAM7S32/16, all other SAM7S devices are package and pinout compatible.
2. Full modem line support on USART1.
3. Only two TC channels are accessible through the PIO.
Configuration Summary
Flash
512 Kbytes Master
256 Kbytes Master
128 Kbytes Master
64 Kbytes
32 Kbytes
32 Kbytes
16 Kbytes
16 Kbytes
TWI
Master
Master
Master
Master/
Slave
Master/
Slave
Flash
Organization SRAM
dual plane
single plane
single plane
single plane
single plane
single plane
single plane
single plane
64 Kbytes 1
64 Kbytes 1
32 Kbytes 1
16 Kbytes 1
8 Kbytes
8 Kbytes
4 Kbytes
4 Kbytes
Table 1-1
USB
Device
Port
1
not
present
1
not
present
summarizes the configuration of the six devices.
USART
2
2
2
2
2
1
2
1
(1) (2)
(1) (2)
(1) (2)
(2)
(2)
(2)
External
Interrupt
Source
2
2
2
2
2
1
2
1
PDC
Channels
11
11
11
11
11
9
11
9
SAM7S Series [DATASHEET]
TC
Channels
3
3
3
3
3
3
3
3
(3)
(3)
I/O 5V
Tolerant
Yes
Yes
Yes
Yes
Yes
Yes
No
No
6175M–ATARM–26-Oct-12
I/O
Lines
32
32
32
32
32
21
32
21
Package
LQFP/
QFN 64
LQFP/
QFN 64
LQFP/
QFN 64
LQFP/
QFN 64
LQFP/
QFN 64
LQFP/
QFN 48
LQFP
LQFP/
QFN 48
3