z8f0822 ZiLOG Semiconductor, z8f0822 Datasheet - Page 220

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

PS022517-0508
(Output)
(Output)
DE
TXD
Table 112. UART Timing without CTS
Parameter Abbreviation
T
T
1
2
Figure 55
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
represented here by DE. DE asserts after the UART Transmit Data Register has been writ-
ten. DE remains asserted for multiple characters as long as the Transmit Data Register is
written with the next character before the current character has completed.
DE Assertion to TXD Falling Edge (Start)
Delay
End of Stop Bit(s) to DE Deassertion Delay
and
Table 112
Figure 55. UART Timing without CTS
T
1
Start
provide timing information for UART pins for the case where the
Bit 0
Bit 1
1 * XIN period 2 * XIN period
1 Bit period
Minimum
Z8 Encore! XP
Bit 7
Delay (ns)
Product Specification
Parity
Electrical Characteristics
1 Bit period +
1 * XIN period
Maximum
®
Stop
Stop Bit(s)
F0822 Series
End of
T
2
207