SAM7S256 Atmel Corporation, SAM7S256 Datasheet - Page 196

• Manufacturer Part Number: SAM7S256
• Manufacturer: Atmel Corporation

Specifications of SAM7S256

• Flash (kbytes): 256 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 55 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 32
• Ext Interrupts: 32
• 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): 64
• Self Program Memory: NO
• 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): 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

AC and DC Parameters
7.20
7-24
Symbol
T
T
T
bsr
rstd
rstl
Reset period timing
Parameter
nTRST reset period
nRESETf to D[31:0], DBGACK, nCPI, nENOUT, nEXEC, nMREQ, SEQ valid
nRESET LOW for guaranteed reset
Figure 7-19 shows the ARM7TDMI reset period timing. The timing parameters used in
Figure 7-19 are listed in Table 7-19.
Copyright © 1994-2001. All rights reserved.
DBGACK
nENOUT
Table 7-19 Reset period timing parameters
nRESET
nMREQ
D[31:0]
nEXEC
nTRST
nCPI
SEQ
Figure 7-19 Reset period timing
T
rstd
T
T
rstl
bsr
Minimum
Maximum
Parameter type
Minimum
ARM DDI 0029G