mc145480vf Freescale Semiconductor, Inc, mc145480vf Datasheet - Page 17

• Manufacturer Part Number: mc145480vf
• Description: Mc145480 5 V Pcm Codec-filter
• Manufacturer: Freescale Semiconductor, Inc

NOTES:
MOTOROLA
DIGITAL SWITCHING CHARACTERISTICS FOR GCI MODE
(V DD = 5.0 V
1. Measurements are made from the point at which the logic signal achieves the guaranteed minimum or maximum logic level.
2. In GCI mode, both transmit and receive 8–bit PCM words are accessed during the B1 channel, or both transmit and receive 8–bit PCM words
Ref.
No.
42
43
44
45
46
47
48
49
50
51
52
53
are accessed during the B2 channel as shown in Figure 6. GCI accesses must occur at a rate of 8 kHz (125 s interval).
D out (DT)
D out (DT)
(BCLKT)
D in (DR)
(BCLKT)
D in (DR)
(FST)
(FST)
FSC
DCL
FSC
DCL
Time Between Successive FSC Pulses
DCL Clock Frequency
DCL Clock Pulse Width High
DCL Clock Pulse Width Low
Hold Time of FSC After Falling Edge of DCL
Setup Time of FSC to DCL Falling Edge
Rising Edge of DCL (After Rising Edge of FSC) to Low Impedance and Valid Data of D out
Rising Edge of FSC (While DCL is High) to Low Impedance and Valid Data of D out
Rising Edge of DCL to Valid Data on D out
Second DCL Falling Edge During LSB to High Impedance of D out
Setup Time of D in Before Rising Edge of DCL
Hold Time of D in After DCL Rising Edge
5%, T A = – 40 to + 85 C, C L = 150 pF, See Figure 6 and Note 1)
46
49
52
48
1
MSB
MSB
47
2
46
3
1
CH1
CH1
4
53
52
50
5
CH2
CH2
49
6
MSB
7
MSB
2
CH3
CH3
8
53
9
ST1
ST1
10
Characteristics
Figure 6. GCI Interface Timing
11
3
ST2
ST2
12
13
ST3
ST3
14
CH1
51
CH1
15 16
LSB
4
LSB
17
44
MSB
42
18
MSB
48
19
45
CH1
CH1
5
20
43
21
52
CH2
CH2
22
23
CH3
CH3
24
25
ST1
ST1
26
53
27
50
ST2
ST2
28
Min
29
512
50
50
20
60
10
20
—
—
—
—
ST3
ST3
30
Note 2
31
LSB
32
LSB
33
6176
Max
—
—
—
—
60
60
60
50
—
60
34
51
MC145480
Unit
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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