SAM7X128 Atmel Corporation, SAM7X128 Datasheet - Page 212

• Manufacturer Part Number: SAM7X128
• Manufacturer: Atmel Corporation

Specifications of SAM7X128

• Flash (kbytes): 128 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 55 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 62
• Ext Interrupts: 62
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Twi (i2c): 1
• Uart: 3
• Can: 1
• Ssc: 1
• Ethernet: 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
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.3
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

Signal Description
A-6
Name
DOUT[31:0]
Data output bus
DRIVEBS
Boundary scan cell enable
ECAPCLK
EXTEST capture clock
ECAPCLKBS
EXTEST capture clock for
boundary-scan
ECLK
External clock output
EXTERN0
External input 0
EXTERN1
External input 1
HIGHZ
High impedance
ICAPCLKBS
INTEST capture clock
Copyright © 1994-2001. All rights reserved.
Type
O8
O4
O4
O4
O4
IC
IC
O4
O4
Description
Unidirectional bus used to transfer data from the processor to the
memory system.
This bus is only used when BUSEN is HIGH. Otherwise it is driven to a
value of zero.
During write cycles the output data becomes valid while MCLK is LOW,
and remains valid until after the falling edge of MCLK.
Controls the multiplexors in the scan cells of an external boundary-scan
chain.
This must be left unconnected, if an external boundary-scan chain is not
connected.
Only used on the ARM7TDMI test chip, and must otherwise be left
unconnected.
Used to capture the device inputs of an external boundary-scan chain
during EXTEST.
When scan chain 3 is selected, the current instruction is EXTEST and the
TAP controller state machine is in the CAPTURE- DR state, then this
signal is a pulse equal in width to TCK2.
This must be left unconnected, if an external boundary-scan chain is not
connected.
In normal operation, this is simply MCLK, optionally stretched with
nWAIT, exported from the core. When the core is being debugged, this
is DCLK, which is generated internally from TCK.
This is connected to the EmbeddedICE Logic and allows breakpoints and
watchpoints to be dependent on an external condition.
This is connected to the EmbeddedICE Logic and allows breakpoints and
watchpoints to be dependent on an external condition.
When the HIGHZ instruction has been loaded into the TAP controller
this signal is HIGH.
See Appendix B Debug in Depth for details.
This is used to capture the device outputs in an external boundary-scan
chain during INTEST.
This must be left unconnected, if an external boundary-scan chain is not
connected.
Table A-3 Signal Descriptions (continued)
ARM DDI 0029G