AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 47

• 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

12. Debug and Test Features
12.1
12.2
Description
The SAM7S Series Microcontrollers feature a number of complementary debug and test capabilities. A common
JTAG/ICE (EmbeddedICE) port is used for standard debugging functions, such as downloading code and single-
stepping through programs. The Debug Unit provides a two-pin UART that can be used to upload an application
into internal SRAM. It manages the interrupt handling of the internal COMMTX and COMMRX signals that trace the
activity of the Debug Communication Channel.
A set of dedicated debug and test input/output pins gives direct access to these capabilities from a PC-based test
environment.
Block Diagram
Figure 12-1. Debug and Test Block Diagram
PDC
Boundary
ARM7TDMI
TAP
DBGU
ICE
ICE/JTAG
TAP
Reset
and
Test
SAM7S Series [DATASHEET]
POR
TMS
TCK
TDI
JTAGSEL
TDO
DTXD
DRXD
TST
6175M–ATARM–26-Oct-12
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