am79c30a Advanced Micro Devices, am79c30a Datasheet - Page 84

• Manufacturer Part Number: am79c30a
• Description: Digital Subscriber Controller ?dsc ?circuit
• Manufacturer: Advanced Micro Devices

SBP Mode Timing
Note:
*The frequency of SCLK is f
internal-phase lock-loop correction.
84
Parameter Symbol
Tp*
Ta
Tb*
t
t
t
t
t
t
t
RISE
FALL
MCSC
CHFS
CLDO
DICH
CHDZ
12.288 MHz
Divide by 1
Divide by 2
Divide by 3
Divide by 4
6.144 MHz
4.096 MHz
3.072 MHz
OSC
V
CC
V
CC
/2
/2
t
D
t
FALL 1,2
XTAL2
Parameter Description
SCLK
High time
Low time
SCLK rise time
SCLK fall time
MCLK to SCLK
@ 6.144 MHz
SCLK High to frame sync
SBOUT
Data available
SBIN set-up time
SBIN hold time
/ 64. Tp and Tb are based on this SCLK frequency but include a ±163-ns allowance for
Figure 34. OSC/MCLK Timing
Am79C30A/32A Data Sheet
t
PWL
Test Conditions
SCLK Load < 80 pF
SCLK Load < 80 pF
MCLK Load < 80 pF
SCLK Load < 80 pF
SBOUT/SFS
Load = 80 pF
t
RISE 1,2
t
PWH
t
CLK
5.025
2.594
2.431
Min
200
50
50
0
5.392
2.615
2.777
Max
250
250
20
20
60
ns
09893H-26
Units
µs
µs
µs
ns
ns
ns
ns
ns
ns