mcf5208 Freescale Semiconductor, Inc, mcf5208 Datasheet - Page 36

• Manufacturer Part Number: mcf5208
• Description: Mcf5208 Coldfire Microprocessor Data Sheet
• Manufacturer: Freescale Semiconductor, Inc

Electrical Characteristics
5.11 I
Table 16
36
NOTES:
1
2
3
and
I1
I2
I3
I4
I5
I6
I7
I8
I9
Num
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 A-16. The I
interface is designed to scale the actual data transition time to move it to the 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 Table A-16 are minimum values.
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.
2
1
2
3
1.
1.
1.
1.
1.
1.
Num
I1
I2
I3
I4
I5
I6
I7
I8
I9
C Input/Output Timing Specifications
Table 17
Refer to the MCF5208 Reference Manual for more information.
Table 17. 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
Table 16. 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
list specifications for the I
2
2
C Output Timing Specifications between I2C_SCL and I2C_SDA
C Input Timing Specifications between I2C_SCL and I2C_SDA
MCF5208 ColdFire
Characteristic
Characteristic
IH
IL
= 2.4 V to V
IH
= 0.5 V to V
IL
®
= 2.4 V to V
= 0.5 V to V
Microprocessor Data Sheet, Rev. 1
2
NOTE
C input and output timing parameters.
IL
IH
= 0.5 V)
IL
= 2.4 V)
IH
= 0.5 V)
= 2.4 V)
Min
10
10
20
10
—
—
6
7
2
Min
—
—
2
8
0
4
0
2
2
Max
Max
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
3
1
1
Freescale Semiconductor
Unit
t
t
t
t
t
ms
ms
ns
ns
cyc
cyc
cyc
cyc
cyc
Unit
t
t
t
t
t
t
t
µs
ns
cyc
cyc
cyc
cyc
cyc
cyc
cyc
2
C