A d v a nce d I n fo rm a t i o n

Eterna Datasheet

Linear Technology / Dust Networks

21

8.9

UART AC Characteristics

The following characteristics are measured with VSUPPLY = 3.6 V at 25 °C, unless otherwise specified.

Table 14

UART Timing Values

Parameter

Conditions

Min

Typ

Max

Unit

Deviation from baud rate

–2

+2

%

Deviation from baud rate

–1

+1

%

Assertion of UART_RX_RTSn to

assertion of UART_RX_CTSn, or

negation of UART_RX_RTSn to

negation of UART_RX_CTSn

0

22

ms

Assertion of UART_RX_CTSn to start

of byte

0

20

ms

End of packet (end of the last stop bit)

to negation of UART_RX_RTSn

0

22

ms

Assertion of UART_TX_RTSn to

assertion of UART_TX_CTSn, or

negation of UART_TX_RTSn to

negation of UART_TX_CTSn

0

22

ms

Assertion of UART_TX_CTSn to start

of byte

0

2

bit

period

End of packet (end of the last stop bit)

to negation of UART_TX_RTSn

0

1

bit

period

Receive Inter-byte delay

100

ms

Start of byte to negation of

UART_TX_CTSn

0

ms

Transmit and Receive Inter-packet

delay (Mode 4 only)

100

ms

Figure 16 UART Timing