參數(shù)資料
型號: MCIMX507CVM8B
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: SPECIALTY MICROPROCESSOR CIRCUIT, PBGA400
封裝: 17 X 17 MM, 0.5 MM PITCH, ROHS COMPLIANT, PLASTIC, MABGA-400
文件頁數(shù): 117/120頁
文件大小: 1980K
代理商: MCIMX507CVM8B
i.MX50 Applications Processors for Consumer Products, Rev. 0
96
Freescale Semiconductor
Electrical Characteristics
4.9.10.3.1
UART IrDA Mode Transmitter
Figure 57 depicts the UART IrDA mode transmit timing with 8 data bit/1 stop bit format. Table 70 lists the
transmit timing characteristics.
Figure 57. UART IrDA Mode Transmit Timing Diagram
4.9.10.3.2
UART IrDA Mode Receiver
Figure 58 depicts the UART IrDA mode receive timing with 8 data bit/1 stop bit format. Table 71 lists the
receive timing characteristics.
Figure 58. UART IrDA Mode Receive Timing Diagram
Table 70. IrDA Mode Transmit Timing Parameters
ID
Parameter
Symbol
Min
Max
Units
UA3
Transmit Bit Time in IrDA mode
tTIRbit
1/Fbaud_rate
1 –T
ref_clk
2
1 F
baud_rate: Baud rate frequency. The maximum baud rate the UART can support is (ipg_perclk frequency)/16.
2 T
ref_clk: The period of UART reference clock ref_clk (ipg_perclk after RFDIV divider).
1/Fbaud_rate + Tref_clk
UA4
Transmit IR Pulse Duration
tTIRpulse
(3/16)*(1/Fbaud_rate) – Tref_clk
(3/16)*(1/Fbaud_rate)+Tref_clk
Table 71. IrDA Mode Receive Timing Parameters
ID
Parameter
Symbol
Min.
Max.
Units
UA5
Receive Bit Time1 in IrDA mode
1
The UART receiver can tolerate 1/(16*Fbaud_rate) tolerance in each bit. But accumulation tolerance in one frame must not
exceed 3/(16*Fbaud_rate).
tRIRbit
1/Fbaud_rate
2 –1/(16*F
baud_rate)
2 F
baud_rate: Baud rate frequency. The maximum baud rate the UART can support is (ipg_perclk frequency)/16.
1/Fbaud_rate +1/(16*Fbaud_rate)—
UA6
Receive IR Pulse Duration
tRIRpulse
1.41
μs
(5/16)*(1/Fbaud_rate)—
Bit 1
Bit 2
Bit 0
Bit 4
Bit 5
Bit 6
Bit 7
TXD
(output)
Bit 3
Start
Bit
STOP
BIT
Possible
Parity
Bit
UA3
UA4
Bit 1
Bit 2
Bit 0
Bit 4
Bit 5
Bit 6
Bit 7
RXD
(input)
Bit 3
Start
Bit
STOP
BIT
Possible
Parity
Bit
UA5
UA6
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