SAM7SE512 Atmel Corporation, SAM7SE512 Datasheet - Page 412
SAM7SE512
Manufacturer Part Number
SAM7SE512
Description
Manufacturer
Atmel Corporation
Specifications of SAM7SE512
Flash (kbytes)
512 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
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33.6.5.1
33.6.5.2
412
SAM7SE512/256/32
IrDA Modulation
IrDA Baud Rate
For baud rates up to and including 115.2 Kbits/sec, the RZI modulation scheme is used. “0” is
represented by a light pulse of 3/16th of a bit time. Some examples of signal pulse duration are
shown in
Table 33-9.
Figure 33-24
Figure 33-24. IrDA Modulation
Table 33-10
the requirement on the maximum acceptable error of ±1.87% must be met.
Table 33-10. IrDA Baud Rate Error
Baud Rate
2.4 Kb/s
9.6 Kb/s
19.2 Kb/s
38.4 Kb/s
57.6 Kb/s
115.2 Kb/s
Peripheral Clock
3 686 400
20 000 000
32 768 000
40 000 000
3 686 400
20 000 000
32 768 000
40 000 000
3 686 400
20 000 000
Table
gives some examples of CD values, baud rate error and pulse duration. Note that
shows an example of character transmission.
Transmitter
IrDA Pulse Duration
33-9.
Output
TXD
Baud Rate
115 200
115 200
115 200
115 200
57 600
57 600
57 600
57 600
38 400
38 400
Bit Period
Start
Bit
0
1
0
78.13 µs
19.53 µs
Pulse Duration (3/16)
9.77 µs
4.88 µs
3.26 µs
1.63 µs
1
CD
11
18
22
22
36
43
33
2
4
6
Data Bits
0
0
Baud Rate Error
1
0.00%
1.38%
1.25%
1.38%
0.00%
1.38%
1.25%
0.93%
0.00%
1.38%
1
16
3
0
Bit Period
Stop
6222F–ATARM–14-Jan-11
Bit
1
Pulse Time
1.63
1.63
1.63
1.63
3.26
3.26
3.26
3.26
4.88
4.88
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