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Z8F021ASH020SC 数据表(PDF) 248 Page - Zilog, Inc.

部件名 Z8F021ASH020SC
功能描述  Z8 Encore XP-R 4K Series High-Performance 8-Bit Microcontrollers
PDF  276 Pages
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制造商  ZILOG [Zilog, Inc.]
网页  http://www.zilog.com
标志 ZILOG - Zilog, Inc.

Z8F021ASH020SC 数据表(HTML) 248 Page - Zilog, Inc.

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PS022815-0206
Electrical Characteristics
Z8 Encore! XP® 4K Series
Product Specification
229
Figure 38 and Table 146 provide timing information for UART pins for the case where
CTS is not used for flow control. DE asserts after the 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.
Figure 38. UART Timing Without CTS
Table 146. UART Timing Without CTS
Parameter
Abbreviation
Delay (ns)
Minimum
Maximum
UART
T1
DE assertion to TXD falling edge (start bit) delay
1 * XIN
period
1 bit time
T2
End of Stop Bit(s) to DE deassertion delay (Tx
data register is empty)
± 5
DE
T1
(Output)
TXD
T2
(Output)
start
bit0
bit 1
bit 7
parity
stop
end of
stop bit(s)



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