SAM7L128 Atmel Corporation, SAM7L128 Datasheet - Page 139
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SAM7L128
Manufacturer Part Number
SAM7L128
Description
Manufacturer
Atmel Corporation
Specifications of SAM7L128
Flash (kbytes)
128 Kbytes
Pin Count
144
Max. Operating Frequency
36 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
80
Ext Interrupts
80
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Uart
3
Segment Lcd
40
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
4
Adc Resolution (bits)
10
Adc Speed (ksps)
460
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
6
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
1.8 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
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5.8.2
ARM DDI 0029G
Instructions
Communications through the DCC
The function of each register bit is as follows:
Bits 31:28
Bits 27:2
Bit 1
Bit 0
From the point of view of the debugger, the registers are accessed through scan chain 2
in the usual way. From the point of view of the processor, these registers are accessed
through coprocessor register transfer instructions.
Use the instructions listed in Table 5-1 to access the DCC registers.
Because the Thumb instruction set does not contain coprocessor instructions, you are
advised to access this data through SWI instructions when in Thumb state.
You can send and receive messages through the DCC. The following sections describe:
•
•
•
Sending a message to the debugger on page 5-18
Receiving a message from the debugger on page 5-18
Interrupt driven use of the DCC on page 5-18.
Copyright © 1994-2001. All rights reserved.
Explanation
Places the value from the DCC control register into the destination register (Rd)
Writes the value in the source register (Rn) to the DCC data write register
Returns the value in the DCC data read register into Rd
Contain a fixed pattern that denotes the EmbeddedICE version
number, in this case 0001.
Reserved.
If W is clear, the DCC data write register is ready to accept data
from the processor.
If W is set, there is data in the DCC data write register and the
debugger can scan it out.
If R is clear, the DCC data read register is free and data can be
placed there from the debugger.
If R is set, DCC data read register has data that has not been read
by the processor and the debugger must wait.
Table 5-1 DCC register access instructions
Debug Interface
5-17
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