Z8FMC16100 Datasheet, PDF (297/402 Pages) Zilog, Inc. – Z8 Encore-R Motor Control Flash MCUs

Z8FMC16100 Series Flash MCU
Product Specification
275
Figure 55 and Table 153 provide timing information for UART pins for the case where the
Clear To Send input signal (CTS) is not used for flow control. In this example, it is
assumed that the Driver Enable polarity has been configured to be Active Low and is rep-
resented here by DE. DE asserts after the UART Transmit Data Register has been written.
DE remains asserted for multiple characters as long as the Transmit Data Register is writ-
ten with the next character before the current character has completed.
DE
(Output)
TxD
(Output)
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T1
Start Bit 0 Bit 1 ¥ ¥ ¥
T2
Bit 7 Parity Stop
Figure 55. UART Timing without CTS
End of
Stop Bit(s)
Table 153. UART Timing without CTS
Delay (ns)
Parameter Abbreviation
Minimum
Maximum
T₁
DE assertion to TxD falling edge (start)
1 bit period 1 bit period +
delay
1 x X_IN period
T₂
End of stop bit(s) to DE deassertion delay 1 x X_IN period 2 x X_IN period
PS024604-1005
PRELIMINARY
UART Timing