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参数资料
| 型号： | LC78684E |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封装： | 14 X 14 MM, QFP-80 |
| 文件页数： | 6/21页 |
| 文件大小： | 152K |
| 代理商： | LC78684E |
LC78684E
No.7350-14/21
Serial Data I/O Interface
DRAM Serial Data Output Timing
T4
Fsck
T1
T2
STCK
STDAT
STREQ
STCK
STDAT
CRCF
T3
T5
T6
T7
: 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.
Ratings
Parameter
Symbol
min
typ
max
Unit
Transfer clock frequency
Fsck
4.2336
MHz
STDAT/STCK setup time
T1
30
ns
STDAT/STCK hold time
T2
30
ns
Data (1byte) transfer time
T3
1.89
s
Data transfer wait time
T4
1.89
s
Data transfer start time
T5
1.89
15.2
s
Data transfer stop time
T6
0
15.2
s
Enable flag turn off time
T7
210
236.2
270
ns
Notes: The typical values shown apply when the frequency of the clock input to the CKIN pin is 16.9344 MHz.
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 or
4 times the values shown.
When the STREQ pin is in input mode, the WOK, OVF, and CNTOK pins can be used instead of the STREQ, STCK, and
SDAT pins. The timing specifications in this case are the same as those shown above.
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