AT91SAM9R64-CU Atmel, AT91SAM9R64-CU Datasheet - Page 470

• Manufacturer Part Number: AT91SAM9R64-CU
• Description: MCU ARM9 64K SRAM 144-LFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9R64-CU

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 240MHz
• Connectivity: EBI/EMI, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: AC'97, POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: ROM
• Ram Size: 72K x 8
• Voltage - Supply (vcc/vdd): 1.08 V ~ 1.32 V
• Data Converters: A/D 3x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LFBGA
• Processor Series: AT91SAMx
• Core: ARM926EJ-S
• Data Bus Width: 32 bit
• Data Ram Size: 64 KB
• Interface Type: 2-Wire, SPI, SSC, USART
• Maximum Clock Frequency: 240 MHz
• Number Of Programmable I/os: 118
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: AT91SAM-ICE, AT91-ISP, AT91SAM9RL-EK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 3 Channel
• Controller Family/series: AT91SAM9xxx
• No. Of I/o's: 49
• Ram Memory Size: 64KB
• Cpu Speed: 240MHz
• No. Of Timers: 3
• Rohs Compliant: Yes
• Package: 144LFBGA
• Device Core: ARM926EJ-S
• Family Name: 91S
• Maximum Speed: 240 MHz
• Operating Supply Voltage: 1.8|3.3 V
• For Use With: AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

34.6.5.1
Figure 34-34. IrDA Modulation
34.6.5.2
6289C–ATARM–28-May-09
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 34-9.
Figure 34-34
Table 34-10
the requirement on the maximum acceptable error of ±1.87% must be met.
Table 34-10. IrDA Baud Rate Error
Transmitter
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
Output
TXD
Table
gives some examples of CD values, baud rate error and pulse duration. Note that
shows an example of character transmission.
Bit Period
IrDA Pulse Duration
Start
34-9.
Bit
0
1
Baud Rate
115 200
115 200
115 200
115 200
57 600
57 600
57 600
57 600
38 400
38 400
0
AT91SAM9R64/RL64 Preliminary
1
Data Bits
0
0
Pulse Duration (3/16)
78.13 µs
19.53 µs
9.77 µs
4.88 µs
3.26 µs
1.63 µs
CD
11
18
22
22
36
43
33
2
4
6
1
1
16
3
Baud Rate Error
0
Bit Period
Stop
0.00%
1.38%
1.25%
1.38%
0.00%
1.38%
1.25%
0.93%
0.00%
1.38%
Bit
1
Pulse Time
1.63
1.63
1.63
1.63
3.26
3.26
3.26
3.26
4.88
4.88
470