MCIMX25 Motorola Semiconductor Products, MCIMX25 Datasheet - Page 79

• Manufacturer Part Number: MCIMX25
• Manufacturer: Motorola Semiconductor Products

Figure 53
Table 56
respectively the conditions and signals cited in
Freescale Semiconductor
SCKT
SCKR
FST
HCKT
HCKR
No.
62
63
64
Symbol
i ck a
i ck s
x ck
i ck
Clock cycle
Clock high period
For internal clock
For external clock
Clock low period
For internal clock
For external clock
SCKR (output)
describes the general timing requirements for the ESAI module.
shows the ESAI HCKR timing diagram.
Signal Name
Internal clock
External clock
Internal clock, asynchronous mode
Internal clock, synchronous mode
4
HCKR
Characteristics
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 2
Significance
1 2
Table 56. ESAI General Timing Requirements
Transmit clock
Receive clock
Transmit frame sync
Transmit high-frequency clock
Receive high-frequency clock
95
Table 54. ESAI Timing Conditions
Figure 53. ESAI HCKR Timing
Table 55. ESAI Signals
In the i.MX25, the internal clock frequency is equal to the IP bus frequency
(133 MHz)
The external clock may be derived from the CRM module or other external
clock sources
In asynchronous mode, SCKT and SCKR are different clocks
In synchronous mode, SCKT and SCKR are the same clock
Symbol
t
SSICC
—
—
—
—
—
Table
97
56.
Expression
2
2
4
4
2
2
T c
T c
—
T c
T c
T c
T c
Significance
9.0
9.0
3
Comments
Min.
30.0
30.0
15
15
—
Table 54
6
6
Max.
—
—
—
—
—
—
—
and
Table 55
Condition
i ck
i ck
—
—
—
—
describe
Unit
ns
ns
ns
79