mcf5274l Freescale Semiconductor, Inc, mcf5274l Datasheet - Page 68

• Manufacturer Part Number: mcf5274l
• Description: Mcf5275 Integrated Microprocessor Family Hardware
• Manufacturer: Freescale Semiconductor, Inc

Preliminary Electrical Characteristics
Table 60
Figure 22
68
Num
I6
I7
I8
I9
lists specifications for the I
NOTES:
1
2
3
shows timing for the values in
Num
I1
I2
I3
I4
I5
I6
I7
I8
I9
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
Table
middle of the I2C_SCL low period. The actual position is affected by the prescale and division
values programmed into the IFDR; however, the numbers given in
Because I2C_SCL and I2C_SDA are open-collector-type outputs, which the processor can only
actively drive low, the time I2C_SCL or I2C_SDA take to reach a high level depends on external
signal capacitance and pull-up resistor values.
Specified at a nominal 50-pF load.
1
1
2
1
3
1
1
1
1
Table 60. I
Clock high time
Data setup time
Start condition setup time (for repeated start condition only)
Stop condition setup time
Table 59. I
60. The 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
MCF5275 Integrated Microprocessor Family Hardware Specification, Rev. 1.1
IL
IH
= 0.5 V to V
= 2.4 V to V
2
C interface is designed to scale the actual data transition time to move it to the
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
= 2.4 V)
= 0.5 V)
Characteristic
2
C output timing parameters shown in
Table 59
Preliminary
and
Table
60.
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
Table 60
4 x t
2 x t
2 x t
Min
0
CYC
CYC
CYC
are minimum values.
Figure
Max
—
—
—
—
—
—
—
—
3
Max
—
—
—
—
22.
Freescale Semiconductor
Units
µS
ns
ns
ns
ns
ns
ns
ns
ns
Units
ns
ns
ns
ns