SAM7L128 Atmel Corporation, SAM7L128 Datasheet - Page 160

• Manufacturer Part Number: SAM7L128
• 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

20.2.3
20.2.4
20.2.4.1
160
AT91SAM7L128/64 Preliminary
Entering Programming Mode
Programmer Handshaking
Write Handshaking
Table 20-3.
The following algorithm puts the device in Parallel Programming Mode:
A handshake is defined for read and write operations. When the device is ready to start a new
operation (RDY signal set), the programmer starts the handshake by clearing the NCMD signal.
The handshaking is achieved once NCMD signal is high and RDY is high.
For details on the write handshaking sequence, refer to
Figure 20-3. Parallel Programming Timing, Write Sequence
DATA[15:0]
0x0044
0x0025
0x0054
0x0035
0x001F
0x001E
• Apply GND, TST, CLKIN, FWUP and the supplies as described in table 4.1.
• Apply XIN clock
• Wait for 20 ms
• Start a read or write handshaking.
MODE[3:0]
DATA[15:0]
NVALID
Command Bit Coding (Continued)
NCMD
NOE
RDY
1
Symbol
CGPB
GGPB
SSE
GSE
WRAM
GVE
2
3
Command Executed
Clear General Purpose NVM bit
Get General Purpose NVM bit
Set Security Bit
Get Security Bit
Write Memory
Get Version
Figure 20-3
4
5
and
Table
6257A–ATARM–20-Feb-08
20-4.