AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 383

• Manufacturer Part Number: AT91SAM7S256D-AU
• Description: ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
• Manufacturer: Atmel
• Series: SAM7S256r

Specifications of AT91SAM7S256D-AU

• Rohs: yes
• Core: ARM
• Processor Series: AT91SAM
• Data Bus Width: 16 bit/32 bit
• Maximum Clock Frequency: 55 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 3 V to 3.6 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: LQFP-64
• Mounting Style: SMD/SMT
• Interface Type: 2-Wire, I2S, SPI, USART
• Length: 7 mm

31.6.5.2
Figure 31-26. IrDA Modulation
Table 31-10
the maximum acceptable error of ±1.87% must be met.
Table 31-10. IrDA Baud Rate Error
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
32 768 000
40 000 000
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
32 768 000
IrDA Baud Rate
gives some examples of CD values, baud rate error and pulse duration. Note that the requirement on
Transmitter
Baud Rate
115 200
115 200
115 200
115 200
57 600
57 600
57 600
57 600
38 400
38 400
38 400
38 400
19 200
19 200
19 200
19 200
9 600
9 600
9 600
9 600
2 400
2 400
2 400
Output
TXD
Bit Period
Start
Bit
0
1
107
130
130
213
260
521
853
CD
11
18
22
22
36
43
33
53
65
12
65
24
96
2
4
6
0
1
Baud Rate Error
Data Bits
0
0.00%
1.38%
1.25%
1.38%
0.00%
1.38%
1.25%
0.93%
0.00%
1.38%
0.63%
0.16%
0.00%
0.16%
0.31%
0.16%
0.00%
0.16%
0.16%
0.16%
0.00%
0.03%
0.04%
0
1
SAM7S Series [DATASHEET]
1
16
3
Pulse Time
0
Bit Period
19.53
19.53
19.53
19.53
78.13
78.13
78.13
1.63
1.63
1.63
1.63
3.26
3.26
3.26
3.26
4.88
4.88
4.88
4.88
9.77
9.77
9.77
9.77
Stop
Bit
1
6175M–ATARM–26-Oct-12
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