AM652X datasheet(233/299 Pages) TI1

233 / 299 page

Start

Bit

Data Bits

UART _TXD

Data Bits

Bit

Start

UART _RXD

233

AM6548, AM6528, AM6546

AM6526, AM6527

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SPRSP08E – NOVEMBER 2017 – REVISED OCTOBER 2018

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Product Folder Links: AM6548 AM6528 AM6546 AM6526 AM6527

Specifications

5.11.5.23 UART

For more details about features and additional description information on the device Universal

Asynchronous Receiver Transmitter, see the corresponding sections within Section 4.3, Signal

Descriptions and Section 6, Detailed Description.

Table 5-122, Table 5-123, and Figure 5-130 present Timing Requirements and Switching Characteristics

for UART interface.

Table 5-122. Timing Requirements for UART

NO.

PARAMETER

DESCRIPTION

MODE

MIN

MAX

UNIT

tw(RX)

Pulse width, receive data bit, 15/30 pF high or low

0.95U (1)

1.05U (1)

tw(CTS)

Pulse width, receive start bit, 15/30 pF high or low

0.95U (1)

1.05U (1)

td(RTS-TX)

Delay time, transmit start bit to transmit data

P (2)

td(CTS-TX)

Delay time, receive start bit to transmit data

P (2)

(1) U = UART baud time = 1/Programmed baud rate

(2) P = Clock period of the reference clock (FCLK, usually 48 MHz or 192 MHz)

Table 5-123. Switching Characteristics Over Recommended Operating Conditions for UART

NO.

PARAMETER

DESCRIPTION

MODE

MIN

MAX

UNIT

f(baud)

Maximum programmable baud rate

15 pF

MHz

30 pF

0.115

tw(TX)

Pulse width, transmit data bit, 15/30 pF high or low

U - 2 (1)

U + 2 (1)

tw(RTS)

Pulse width, transmit start bit, 15/30 pF high or low

U - 2 (1)

U + 2 (1)

(1) U = UART baud time = 1/Programmed baud rate

Figure 5-130. UART Timing

For more information, see section Universal Asynchronous Receiver/Transmitter (UART) in chapter

Peripherals of the device TRM.

5.11.5.24 USB

The USB 2.0 subsystem is fully-compliant with the Universal Serial Bus (USB) Specification, revision 2.0.

Refer to the specification for timing details.

The USB 3.1 GEN1 Dual-Role Device Subsystem is compliant with the Universal Serial Bus (USB) 3.1

Specification, revision 1.0. Refer to the specification for timing details.

For more details about features and additional description information on the device Universal Serial Bus

Subsystem (USB), see the corresponding sections within Section 4.3, Signal Descriptions and Section 6,

Detailed Description.

AM652X データシート(PDF) 233 Page - Texas Instruments

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