MCIMX508CZK8B Freescale Semiconductor, MCIMX508CZK8B Datasheet - Page 82

• Manufacturer Part Number: MCIMX508CZK8B
• Description: Processors - Application Specialized CODEX REV 1.1
• Manufacturer: Freescale Semiconductor
• Type: Multimedia Applicationsr

Specifications of MCIMX508CZK8B

• Core: ARM Cortex A8
• Processor Series: i.MX50

1
2
3
4
Electrical Characteristics
4.9.6
Figure 42
82
A device must internally provide a hold time of at least 300 ns for I2DAT signal in order to bridge the undefined region of the
falling edge of I2CLK.
The maximum hold time has only to be met if the device does not stretch the LOW period (ID no IC5) of the I2CLK signal.
A Fast-mode I
of 250 ns must be met. This automatically is the case if the device does not stretch the LOW period of the I2CLK signal.
If such a device does stretch the LOW period of the I2CLK signal, it must output the next data bit to the I2DAT line
max_rise_time (IC9) + data_setup_time (IC7) = 1000 + 250 = 1250 ns (according to the Standard-mode I
before the I2CLK line is released.
C
IC10
IC11
IC12
IC4
IC5
IC6
IC7
IC8
IC9
b
ID
= total capacitance of one bus line in pF.
One-Wire bus
(BATT_LINE)
Data hold time
HIGH Period of I2CLK Clock
LOW Period of the I2CLK Clock
Set-up time for a repeated START condition
Data set-up time
Bus free time between a STOP and START condition
Rise time of both I2DAT and I2CLK signals
Fall time of both I2DAT and I2CLK signals
Capacitive load for each bus line (C
depicts the RPP timing, and
One-Wire (OWIRE) Timing Parameters
2
C-bus device can be used in a Standard-mode I2C-bus system, but the requirement of Set-up time (ID No IC7)
Figure 42. Reset and Presence Pulses (RPP) Timing Diagram
i.MX50 Applications Processors for Consumer Products, Rev. 4
Table 58. I
One-WIRE Tx
“Reset Pulse”
Parameter
OW1
2
C Module Timing Parameters (continued)
Table 59
b
)
t
R
lists the RPP timing parameters.
1.65 V–1.95 V, 2.7 V–3.3 V
OW3
OW2
Min
250
One Wire Device Tx
4.0
4.7
4.7
4.7
Supply Voltage =
0
—
—
—
Standard Mode
“Presence Pulse”
1
3.45
1000
Max
300
400
—
—
—
—
—
OW4
2
Freescale Semiconductor
20 + 0.1C
20 + 0.1C
Supply Voltage =
2.7 V–3.3 V
100
Fast Mode
Min
0.6
1.3
0.6
1.3
2
0
—
C-bus specification)
1
3
b
b
4
4
Max
0.9
300
300
400
—
—
—
—
—
2
Unit
pF
µs
µs
µs
µs
ns
µs
ns
ns