AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 136

• 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

20.3
20.3.1
Table 20-20. Signal Description List
Signal Name
VDDFLASH
VDDIO
VDDCORE
VDDPLL
GND
XIN
Serial Fast Flash Programming
The Serial Fast Flash programming interface is based on IEEE Std. 1149.1 “Standard Test Access Port and
Boundary-Scan Architecture”. Refer to this standard for an explanation of terms used in this chapter and for a
description of the TAP controller states.
In this mode, data read/written from/to the embedded Flash of the device are transmitted through the JTAG inter-
face of the device.
In Serial Fast Flash Programming Mode, the device is in a specific test mode. Only a distinct set of pins is signifi-
cant. Other pins must be left unconnected.
Figure 20-7. Serial Programming
Device Configuration
Function
Flash Power Supply
I/O Lines Power Supply
Core Power Supply
PLL Power Supply
Ground
Main Clock Input.
This input can be tied to GND. In this
case, the device is clocked by the internal
RC oscillator.
0-50MHz
VDDIO
VDDIO
VDDIO
GND
TDO
TMS
TCK
TDI
TST
PGMEN0
PGMEN1
PGMEN2
XIN
Clocks
Power
Ground
Power
Power
Power
Power
Type
Input
Active
Level
VDDCORE
VDDIO
VDDPLL
VDDFLASH
GND
SAM7S Series [DATASHEET]
Comments
32 kHz to 50 MHz
6175M–ATARM–26-Oct-12
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