SAM7X512 Atmel Corporation, SAM7X512 Datasheet - Page 282
SAM7X512
Manufacturer Part Number
SAM7X512
Description
Manufacturer
Atmel Corporation
Specifications of SAM7X512
Flash (kbytes)
512 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)
128
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
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29.3
29.3.1
29.4
29.4.1
29.4.2
29.4.3
282
Application Block Diagram
Product Dependencies
SAM7X512/256/128
I/O Lines Description
I/O Lines
Power Management
Interrupt
Figure 29-2. Application Block Diagram
Table 29-2.
Both TWD and TWCK are bidirectional lines, connected to a positive supply voltage via a current
source or pull-up resistor (see
high. The output stages of devices connected to the bus must have an open-drain or open-col-
lector to perform the wired-AND function.
TWD and TWCK pins may be multiplexed with PIO lines. To enable the TWI, the programmer
must perform the following steps:
The TWI interface may be clocked through the Power Management Controller (PMC), thus the
programmer must first configure the PMC to enable the TWI clock.
The TWI interface has an interrupt line connected to the Advanced Interrupt Controller (AIC). In
order to handle interrupts, the AIC must be programmed before configuring the TWI.
Pin Name
TWD
TWCK
• Program the PIO controller to:
• Enable the peripheral clock.
Rp: Pull up value as given by the I²C Standard
Host with
Interface
– Dedicate TWD and TWCK as peripheral lines.
– Define TWD and TWCK as open-drain.
TWI
TWD
TWCK
I/O Lines Description
Serial EEPROM
Atmel TWI
Slave 1
Pin Description
Two-wire Serial Data
Two-wire Serial Clock
Figure 29-2 on page
I²C RTC
Slave 2
Controller
I²C LCD
Slave 3
282). When the bus is free, both lines are
I²C Temp.
Slave 4
Sensor
Rp
6120I–ATARM–06-Apr-11
Input/Output
Input/Output
Type
Rp
VDD
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