z8f0822 ZiLOG Semiconductor, z8f0822 Datasheet - Page 219

• Manufacturer Part Number: z8f0822
• Description: High Performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

PS022517-0508
(Output)
(Input)
(Output)
CTS
DE
TXD
Table 111. UART Timing with CTS
Parameter Abbreviation
T
T
T
UART Timing
1
2
3
Figure 54
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.
T
CTS Fall to DE Assertion Delay
DE Assertion to TXD Falling Edge (Start)
Delay
End of Stop Bit(s) to DE Deassertion Delay
1
and
Table 111
T
2
Figure 54. UART Timing with CTS
Start
provide timing information for UART pins for the case where the
Bit 0
Bit 1
2 * XIN period 2 * XIN period
1 * XIN period 2 * XIN period
1 Bit period
Minimum
Z8 Encore! XP
Bit 7
Delay (ns)
Parity
Product Specification
1 * XIN period
Electrical Characteristics
+ 1 Bit period
1 Bit period +
Maximum
Stop
Stop Bit(s)
®
End of
F0822 Series
T
3
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