mcf51ac256 Freescale Semiconductor, Inc, mcf51ac256 Datasheet - Page 32

• Manufacturer Part Number: mcf51ac256
• Description: Mcf51ac256 Coldfire Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Preliminary Electrical Characteristics
2.12
Table 20
32
1
2
3
4
and
Num
Refer to
All timing is shown with respect to 20% V
assumes slew rate control disabled and high drive strength enabled for SPI output pins.
Time to data active from high-impedance state.
Hold time to high-impedance state.
10
11
12
SPI Characteristics
1
2
3
4
5
6
7
8
9
Figure 13
1
Figure 13
C
D
D
D
D
D
D
D
D
D
D
D
D
through
Operating frequency
Cycle time
Enable lead time
Enable lag time
Clock (SPSCK) high time Master and
Slave
Clock (SPSCK) low time Master and
Slave
Data setup time (inputs)
Data hold time (inputs)
Access time, slave
Disable time, slave
Data setup time (outputs)
Data hold time (outputs)
through
Figure 16
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.1
Characteristic
Figure
Preliminary—Subject to Change Without Notice
Table 20. SPI Electrical Characteristic
describe the timing requirements for the SPI system.
3
4
16.
DD
2
and 70% V
Master
Master
Master
Master
Master
Master
Master
Master
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
DD
Symbol
t
t
t
t
t
, unless noted; 100 pF load on all SPI pins. All timing
t
t
t
SCKH
SCKL
t
t
SI(M)
HI(M)
t
t
HI(S)
Lead
Lead
SI(S)
t
t
t
t
SCK
SCK
t
f
f
Lag
Lag
SO
SO
HO
HO
t
dis
op
op
A
1/2 t
1/2 t
f
Bus
SCK
SCK
Min
–10
–10
1/2
1/2
dc
—
—
30
30
30
30
—
25
25
/2048
2
4
0
– 25
– 25
f
f
2048
Bus
Bus
Max
1/2
1/2
—
—
—
40
40
—
—
—
—
—
—
—
—
—
—
/2
/4
Freescale Semiconductor
t
t
Unit
SCK
SCK
t
Hz
ns
ns
ns
ns
ns
ns
ns
ns
cyc