lc78684e Sanyo Semiconductor Corporation, lc78684e Datasheet - Page 14

• Manufacturer Part Number: lc78684e
• Description: Mp3 Decoder For Compact Disc Players
• Manufacturer: Sanyo Semiconductor Corporation

Serial Data I/O Interface
DRAM Serial Data Output Timing
Notes: The typical values shown apply when the frequency of the clock input to the CKIN pin is 16.9344 MHz.
Transfer clock frequency
STDAT/STCK setup time
STDAT/STCK hold time
Data (1byte) transfer time
Data transfer wait time
Data transfer start time
Data transfer stop time
Enable flag turn off time
x The fsck clock frequency can also be set to 2.1168 or 1.0584 MHz (typical). The values of T3 to T7 will be, in that case, 2
x When the STREQ pin is in input mode, the WOK, OVF, and CNTOK pins can be used instead of the STREQ, STCK, and
or 4 times the values shown.
SDAT pins. The timing specifications in this case are the same as those shown above.
: Performing a serial data output operation requires that a command to transfer data from DRAM be issued.
If this command has not been issued, the STCK and STDAT pins will not output the clock and data signals, even if the STREQ goes
high.
STREQ
STCK
STDAT
CRCF
T5
Parameter
T3
STCK
STDAT
T4
Fsck
T1
LC78684E
T2
Symbol
Fsck
T1
T2
T3
T4
T5
T6
T7
1.89
min
210
30
30
0
Ratings
4.2336
236.2
1.89
1.89
typ
T6
T7
max
15.2
15.2
270
No.7350-14/21
MHz
Unit
ns
ns
Ps
Ps
Ps
Ps
ns