MB82DBS08164C-70L Datasheet, PDF (9/58 Pages) Fujitsu Component Limited. – 128 M Bit (8 M word×16 bit) Mobile Phone Application Specific Memory

MB82DBS08164C-70L
CR Key 2
CR Key 2 should be set or read at 6th cycle of the CR Set or Verify sequence.
Pin Name
Register
Name
Function
Key
Description
Note
000, 001 Reserved for future use
*1
010 4 clocks
DQ2 to DQ0
RL
Read Latency
011 5 clocks
100 6 clocks
101 7 clocks
110, 111 Reserved for future use
*1
DQ3
⎯
⎯
1
Reserved for future use
*2
DQ4
SW
Single Write
0
Burst Read & Burst Write
1
Reserved for future use
*1
0
Reserved for future use
*1
DQ5
VE
Valid Clock Edge
1
Rising Clock Edge
0
Reset to Asynchronous mode *6
DQ6
RA
Reset to Asynchronous
1
Remain the previous mode
*3
DQ7
WC
Write Control
0
WE Single Clock Pulse Control
without Write Suspend Function
1
WE Level Control
with Write Suspend Function
DQ15 to DQ8
⎯
⎯
1
Unused bits must be 1
*2
*1 : It is prohibited to apply this key.
*2 : Must be set to “1”.
*3 : Sleep and Partial power down mode are effective only when RA = 1.
*4 : If M = 0, all the registers must be set with appropriate Key input at the same time.
*5 : If M = 1, PS and DS must be set with appropriate Key input at the same time. Except for PS and DS, all the
other key inputs must be “1”.
*6 : In case of RA = 0, CE2 brought to Low reset the device to asynchronous standby state regardless PS set
value therefore Sleep and Partial power down mode are not available.
9