SAM7SE256 Atmel Corporation, SAM7SE256 Datasheet - Page 129

• Manufacturer Part Number: SAM7SE256
• Manufacturer: Atmel Corporation

Specifications of SAM7SE256

• Flash (kbytes): 256 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 48 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 88
• Ext Interrupts: 88
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 1
• Uart: 3
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

Table 20-17. Signal Description List (Continued)
20.3.2
6222F–ATARM–14-Jan-11
Signal Name
TST
PGMEN0
PGMEN1
TCK
TDI
TDO
TMS
Entering Serial Programming Mode
Function
Test Mode Select
Test Mode Select
Test Mode Select
JTAG TCK
JTAG Test Data In
JTAG Test Data Out
JTAG Test Mode Select
The following algorithm puts the device in Serial Programming Mode:
Note:
Table 20-18. Reset TAP Controller and Go to Select-DR-Scan
• Apply GND, VDDIO, VDDCORE, VDDFLASH and VDDPLL.
• Apply XIN clock within T
• Wait for T
• Reset the TAP controller clocking 5 TCK pulses with TMS set.
• Shift 0x2 into the IR register (IR is 4 bits long, LSB first) without going through the Run-Test-
• Shift 0x2 into the DR register (DR is 4 bits long, LSB first) without going through the Run-
• Shift 0xC into the IR register (IR is 4 bits long, LSB first) without going through the Run-Test-
Idle state.
Test-Idle state.
Idle state.
After reset, the device is clocked by the internal RC oscillator. Before clearing RDY signal, if an
external clock (> 32 kHz) is connected to XIN, then the device will switch on the external clock.
Else, XIN input is not considered. An higher frequency on XIN speeds up the programmer
handshake.
TDI
POR_RESET
Xt
X
X
X
X
X
X
.
POR_RESET
JTAG
Test
TMS
1
1
1
1
1
0
1
+ 32(T
Output
Type
Input
Input
Input
Input
Input
Input
TAP Controller State
Test-Logic Reset
Run-Test/Idle
Select-DR-Scan
SCLK
) if an external clock is available.
Active
Level
High
High
High
-
-
-
-
SAM7SE512/256/32
Comments
Must be connected to VDDIO.
Must be connected to VDDIO
Must be connected to VDDIO
Pulled-up input at reset
Pulled-up input at reset
Pulled-up input at reset
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