TSC87251G1A
11.2. AC Characteristics – Serial Port in Shift Register Mode
Definition of symbols
Table 45. 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No Longer Valid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 46. Serial Port AC Timing –Shift Register Mode; V = 4.5 to 5.5 V, T = –40 to 85°C
DD
A
16 MHz
FOSC Variable
Symbol
Parameter
Unit
Min
756
620
510
0
Max
Min
Max
T
Serial Port Clock Cycle Time
12×T
ns
ns
ns
ns
ns
XLXL
QVXH
XHQX
XHDX
XHDV
OSC
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
12×T
–136
OSC
10×T
–120
OSC
0
500
10×T
–130
OSC
Waveforms
T
XLXL
TXD
T
XHQX
(1)
(1)
Set TI
T
QVXH
RXD
(Out)
0
1
2
3
4
5
6
7
T
Set RI
XHDX
T
XHDV
RXD
(In)
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 20. Serial Port Waveforms – Shift Register Mode
41
Rev. A – September 21, 1998
TEMIC [ TEMIC SEMICONDUCTORS ]
