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MC9S12E128 Datasheet, PDF (588/606 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers | |||
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Appendix A Electrical Characteristics
In Table A-18 the timing characteristics for slave mode are listed.
Table A-18. SPI Slave Mode Timing Characteristics
Num C
Characteristic
Symbol
Min
Typ
1
P SCK Frequency
fsck
DC
â
1
P SCK Period
tsck
4
â
2
D Enable Lead Time
tlead
4
â
3
D Enable Lag Time
tlag
4
â
4
D Clock (SCK) High or Low Time
twsck
4
â
5
D Data Setup Time (Inputs)
tsu
8
â
6
D Data Hold Time (Inputs)
thi
8
â
7
D Slave Access Time (time to data active)
ta
â
â
8
D Slave MISO Disable Time
tdis
â
â
9
D Data Valid after SCK Edge
tvsck
â
â
10
D Data Valid after SS fall
tvss
â
â
11
D Data Hold Time (Outputs)
tho
20
â
12
D Rise and Fall Time Inputs
trï¬
â
â
13
D Rise and Fall Time Outputs
trfo
â
â
1 tbus added due to internal synchronization delay
Max
1/4
â
â
â
â
â
â
20
22
30 + tbus1
30 + tbus1
â
8
8
Unit
fbus
tbus
tbus
tbus
tbus
ns
ns
ns
ns
ns
ns
ns
ns
ns
MC9S12E128 Data Sheet, Rev. 1.07
588
Freescale Semiconductor
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