MCF5212 FREESCALE [Freescale Semiconductor, Inc], MCF5212 Datasheet - Page 36

• Manufacturer Part Number: MCF5212
• Description: Microcontroller Family Hardware Specification
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Preliminary Electrical Characteristics
2.10 I
Table 30
Table 31
Figure 7
36
Num
shows timing for the values in
lists specifications for the I
lists specifications for the I
NOTES:
1
2
3
11
I2
I3
I4
I5
I6
I7
I8
I9
2
Num
Note: Output numbers depend on the value programmed into the IFDR; an IFDR programmed with
the maximum frequency (IFDR = 0x20) results in minimum output timings as shown in
I
low period. The actual position is affected by the prescale and division values programmed into the
IFDR; however, the numbers given in
Because SCL and SDA are open-collector-type outputs, which the processor can only actively drive
low, the time SCL or SDA take to reach a high level depends on external signal capacitance and
pull-up resistor values.
Specified at a nominal 50-pF load.
11
2
C Input/Output Timing Specifications
I2
I3
I4
I5
I6
I7
I8
I9
C interface is designed to scale the actual data transition time to move it to the middle of the SCL
1
2
1
3
1
1
1
1
1
Table 31. I
Start condition hold time
Clock low period
SCL/SDA rise time (V
Data hold time
SCL/SDA fall time (V
Clock high time
Data setup time
Start condition setup time (for repeated start condition only)
Stop condition setup time
Table 30. I
Start condition hold time
Clock low period
I2C_SCL/I2C_SDA rise time
(V
Data hold time
I2C_SCL/I2C_SDA fall time
(V
Clock high time
Data setup time
Start condition setup time (for repeated start
condition only)
Stop condition setup time
IL
IH
= 0.5 V to V
= 2.4 V to V
MCF5213 Microcontroller Family Hardware Specification, Rev. 1.2
2
2
C Output Timing Specifications between I2C_SCL and I2C_SDA
C Input Timing Specifications between I2C_SCL and I2C_SDA
IH
IL
Characteristic
IH
IL
= 2.4 V)
= 0.5 V)
Characteristic
= 2.4 V to V
= 0.5 V to V
2
2
C input timing parameters shown in
C output timing parameters shown in
Table 30
Table 31
IL
IH
= 0.5 V)
= 2.4 V)
Preliminary
and
are minimum values.
Table
31.
10 x t
20 x t
10 x t
10 x t
6 x t
7 x t
2 x t
Min
—
—
CYC
CYC
CYC
CYC
CYC
CYC
CYC
2 x t
8 x t
4 x t
2 x t
2 x t
Min
—
—
0
0
CYC
CYC
CYC
CYC
CYC
Figure
Figure
Max
—
—
—
—
—
—
—
—
3
Max
7.
—
—
—
—
—
—
—
1
1
7.
Table
Freescale Semiconductor
Units
µS
ns
ns
ns
ns
ns
ns
ns
ns
31. The
Units
mS
mS
ns
ns
ns
ns
ns
ns
ns