52
AT/TSC8x251G2D
4135F–8051–11/06
AC Characteristics - Real-Time Asynchronous Wait State
Definition of Symbols
Table 43.
Real-Time Asynchronous Wait Timing Symbol Definitions
Timings
Table 44.
Real-Time Asynchronous Wait AC Timings; VDD = 2.7 to 5.5 V, TA = -40 to
85
°C
Note:
1. N is the number of wait states added (N
≥ 1).
Waveforms
Figure 16.
Real-time Asynchronous Wait State Timings
AC Characteristics - Serial Port in Shift Register Mode
Definition of Symbols
Table 45.
Serial Port Timing Symbol Definitions
Signals
Conditions
S
PSEN#/RD#/WR#
L
Low
Y
AWAIT#
V
Valid
X
No Longer Valid
Symbol
Parameter
Min
Max
Unit
TSLYV
PSEN#/RD#/WR# Low to Wait Set-up
TOSC - 10
ns
TSLYX
Wait Hold after PSEN#/RD#/WR# Low
(2N-1)TOSC + 10
ns(1)
TSLYV
TSLYX
RD#/PSEN#/WR#
AWAIT#
Signals
Conditions
D
Data In
H
High
Q
Data Out
L
Low
X
Clock
V
Valid
X
No Longer Valid
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