TSC80251G2D
11.4 AC Characteristics - Serial Port in Shift Register Mode
Definition of symbols
Table 51. Serial Port Timing Symbol Definitions
Signals
Conditions
D
Q
X
Data In
H
L
High
Data Out
Clock
Low
V
X
Valid
No Longer Valid
Timings
Table 52. Serial Port AC Timing -Shift Register Mode; V = 2.7 to 5.5 V, T = -40 to 85°C
DD
A
12 MHz
16 MHz
24 MHz(1)
Symbol
Parameter
Unit
Min
Max
Min
Max
Min
Max
T
Serial Port Clock Cycle Time
998
833
165
0
749
625
124
0
500
417
82
ns
ns
ns
ns
ns
XLXL
QVXH
XHQX
XHDX
XHDV
T
T
T
T
Output Data Setup to Clock Rising Edge
Output Data hold after Clock Rising Edge
Input Data Hold after Clock Rising Edge
Clock Rising Edge to Input Data Valid
0
974
732
482
Note:
1. For high speed versions only.
Waveforms
T
XLXL
TXD
T
(1)
QVXH
Set TI
T
XHQX
RXD (Out)
RXD (In)
0
1
2
3
4
5
6
7
(1)
T
Set RI
XHDX
T
XHDV
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Note:
1. TI and RI are set during S1P1 of the peripheral cycle following the shift of the eight bit.
Figure 25. Serial Port Waveforms - Shift Register Mode
Rev. A - May 7, 1999
47
TEMIC [ TEMIC SEMICONDUCTORS ]
