Z8FMC16100 Datasheet, PDF (296/402 Pages) Zilog, Inc. – Z8 Encore-R Motor Control Flash MCUs

Z8 Encore!^® Motor Control Flash MCUs
Product Specification
274
UART Timing
Figure 54 and Table 152 provide timing information for UART pins for the case where the
Clear To Send input pin (CTS) is used for flow control. In this example, it is assumed that
the Driver Enable polarity has been configured to be Active Low and is represented here
by DE. The CTS to DE assertion delay (T1) assumes the UART Transmit Data Register
has been loaded with data prior to CTS assertion.
CTS
(Input)
DE
(Output)
TxD
(Output)
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T1
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T2
Start Bit 0 Bit 1 ¥ ¥ ¥
T3
Bit 7 Parity Stop
Figure 54. UART Timing with CTS
End of
Stop Bit(s)
Table 152. UART Timing with CTS
Delay (ns)
Parameter Abbreviation
Minimum
Maximum
T₁
CTS fall to DE assertion delay
2 x X_IN period 2 x X_IN period
+ 1 bit period
T₂
DE assertion to TxD falling edge (start)
1 bit period 1 bit period +
delay
1 x X_IN period
T₃
End of stop bit(s) to DE deassertion delay 1 x X_IN period 2 x X_IN period
Electrical Characteristics
PRELIMINARY
PS024604-1005