SAM7SE256 Atmel Corporation, SAM7SE256 Datasheet - Page 145

• 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 21-7.
21.6.5.5
6222F–ATARM–14-Jan-11
Pins
NRD/CFOE
NWR0/NWE/CFWE
NWR1/NBS1/CFIOR
NBS3/CFIOW
NCS0/CFRNW
Application Example
Shared CompactFlash Interface Multiplexing
Figure 21-5 on page 145
CFRNW signals are not directly connected to the CompactFlash slot 0, but do control the direc-
tion and the output enable of the buffers between the EBI and the CompactFlash Device. The
timing of the CFCS0 signal is identical to the NCS4 signal. Moreover, the CFRNW signal
remains valid throughout the transfer, as does the address bus. The CompactFlash _WAIT sig-
nal is connected to the NWAIT input of the Static Memory Controller. For details on these
waveforms and timings, refer to the Static Memory Controller Section.
Figure 21-5. CompactFlash Application Example
Access to CompactFlash Device
CompactFlash Signals
CFOE
CFWE
CFIOR
CFIOW
CFRNW
NCS0/CFRNW
NCS4/CFCS0
NWR1/CFIOR
NCS5/CFCE1
NCS6/CFCE2
NWE/CFWE
NRD/CFOE
A22/REG
CD (PIO)
D[15:0]
CFIOW
NWAIT
A[10:0]
illustrates an example of a CompactFlash application. CFCS0 and
DIR
/OE
/OE
Access to Other EBI Devices
EBI Signals
NRD
NWR0/NWE
NWR1/NBS1
NBS3
NCS0
SAM7SE512/256/32
D[15:0]
_CD1
_CD2
A[10:0]
_REG
_OE
_WE
_IORD
_IOWR
_CE1
_CE2
_WAIT
145