IMX7SCEC datasheet(109/152 Pages) NXP

109 / 152 page

Electrical characteristics

i.MX 7Solo Family of Applications Processors Datasheet, Rev. 5, 07/2017

NXP Semiconductors

109

4.10.13.2.1 UART transmitter

Figure 83 depicts the transmit timing of UART in the RS-232 Serial mode, with 8 data bit/1 stop bit

format. Table 82 lists the UART RS-232 Serial mode transmit timing characteristics.

Figure 83. UART RS-232 Serial mode transmit timing diagram

4.10.13.2.2

UART receiver

Figure 84 depicts the RS-232 Serial mode receive timing with 8 data bit/1 stop bit format. Table 83 lists

Serial mode receive timing characteristics.

Figure 84. UART RS-232 Serial mode receive timing diagram

4.10.14 USB HSIC timing

This section describes the electrical information of the USB HSIC port.

Table 82. RS-232 Serial mode transmit timing parameters

Parameter

Symbol

Min

Max

Unit

UA1

Transmit Bit Time

tTbit

1/Fbaud_rate

1 - T

ref_clk

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

—

Table 83. RS-232 Serial mode receive timing parameters

Parameter

Symbol

Min

Max

Unit

UA2

Receive Bit Time1

1 The UART receiver can tolerate 1/(16 x F

baud_rate) tolerance in each bit. But accumulation tolerance in one frame must not

exceed 3/(16 x Fbaud_rate).

tRbit

1/Fbaud_rate

2 - 1/(16

x Fbaud_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 x Fbaud_rate)

—

Start

Bit

Bit 1

Bit 2

Bit 0

Bit 4

Bit 5

Bit 6

Bit 7

UARTx_TX_DATA

(output)

Bit 3

STOP

BIT

Start

Bit

Possible

Parity

Bit

Par Bit

UA1

Bit 1

Bit 2

Bit 0

Bit 4

Bit 5

Bit 6

Bit 7

UARTx_RX_DATA

(output)

Bit 3

Start

Bit

STOP

BIT

Start

Bit

Possible

Parity

Bit

Par Bit

UA2

IMX7SCEC Datasheet(PDF) 109 Page - NXP Semiconductors

IMX7SCEC Datasheet(HTML) 109 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL