SAM7X256 Atmel Corporation, SAM7X256 Datasheet - Page 147

• Manufacturer Part Number: SAM7X256
• Manufacturer: Atmel Corporation

Specifications of SAM7X256

• Flash (kbytes): 256 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): 64
• 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

22.4.5
Register Name:
Access Type:
• RXNPTR: Receive Next Pointer Address
RXNPTR is the address of the next buffer to fill with received data when the current buffer is full.
22.4.6
Register Name:
Access Type:
• RXNCR: Receive Next Counter Value
RXNCR is the size of the next buffer to receive.
6120I–ATARM–06-Apr-11
31
23
15
31
23
15
7
7
PDC Receive Next Pointer Register
PDC Receive Next Counter Register
PERIPH_RNPR
Read-write
30
22
14
PERIPH_RNCR
Read-write
30
22
14
6
6
29
21
13
29
21
13
5
5
28
20
12
28
20
12
4
4
RXNPTR
RXNPTR
RXNPTR
RXNPTR
RXNCR
RXNCR
--
--
27
19
11
27
19
11
3
3
26
18
10
26
18
10
2
2
SAM7X512/256/128
25
17
25
17
9
1
9
1
24
16
24
16
8
0
8
0
147