Abov MC97F6108A - 20.14 USART Characteristics; Figure 109. Waveform for USART Timing Characteristics; Figure 110. Timing Waveform for the USART Module; Table 51. USART Characteristics

MC97F6108A User’s manual 20. Electrical characteristics
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20.14 USART characteristics
Table 51. USART Characteristics
(T
A
= -40°C ~ +85°C, VDD=2.7V ~ 5.5V, f
IRC
=8MHz)
Parameter
Symbol
MIN
TYP
MAX
Unit
Serial port clock cycle time
t
SCK
1800
t
CPU
x 16
2200
ns
Output data setup to clock rising edge
t
S1
8100
t
CPU
x 13
–
ns
Clock rising edge to input data valid
t
S2
–
–
590
ns
Output data hold after clock rising edge
t
H1
t
CPU
- 50
t
CPU
–
ns
Input data hold after clock rising edge
t
H2
0
–
–
ns
Serial port clock High, Low level width
t
HIGH
, t
LOW
720
t
CPU
x 8
1280
ns
t
HIGH
t
LOW
t
SCK
Figure 109. Waveform for USART Timing Characteristics
Shift Clock
Data Out D1 D2 D3 D4 D5 D6 D7D0
ValidData In Valid Valid Valid Valid Valid Valid Valid
tSCK
tS1
tH1
tH2
tS2
Figure 110. Timing Waveform for the USART Module