Справочник Пользователя для Cypress CY14B104K
PRELIMINARY
CY14B104K, CY14B104M
Document #: 001-07103 Rev. *K
Page 20 of 31
AutoStore/Power Up RECALL
Parameters
Description
20 ns
25 ns
45 ns
Unit
Min
Max
Min
Max
Min
Max
t
HRECALL
Power Up RECALL Duration
20
20
20
ms
t
STORE
STORE Cycle Duration
8
8
8
ms
t
DELAY
Time Allowed to Complete SRAM Cycle
20
25
25
ns
V
SWITCH
Low Voltage Trigger Level
2.65
2.65
2.65
V
t
VCCRISE
VCC Rise Time
150
150
150
μs
V
HDIS
HSB Output Driver Disable Voltage
1.9
1.9
1.9
V
t
LZHSB
HSB To Output Active Time
5
5
5
μs
t
HHHD
HSB High Active Time
500
500
500
ns
Switching Waveforms
Figure 12. AutoStore or Power Up RECALL
V
SWITCH
V
HDIS
V
VCCRISE
t
STORE
t
STORE
t
HHHD
t
HHHD
t
DELAY
t
DELAY
t
LZHSB
t
LZHSB
t
HRECALL
t
HRECALL
HSB OUT
Autostore
POWER-
UP
RECALL
Read & Write
Inhibited
(
RWI
)
POWER-UP
RECALL
Read & Write
BROWN
OUT
Autostore
POWER-UP
RECALL
Read & Write
POWER
DOWN
Autostore
Note
24
Note
24
Note
27
Notes
23. t
HRECALL
starts from the time V
CC
rises above V
SWITCH.
24. If an SRAM write has not taken place since the last nonvolatile cycle, no AutoStore or Hardware STORE takes place.
25. On a Hardware STORE, Software STORE / RECALL, AutoStore Enable / Disable and AutoStore initiation, SRAM operation continues to be enabled for time t
25. On a Hardware STORE, Software STORE / RECALL, AutoStore Enable / Disable and AutoStore initiation, SRAM operation continues to be enabled for time t
DELAY
.
26. Read and Write cycles are ignored during STORE, RECALL, and while VCC is below V
SWITCH.
27. HSB pin is driven HIGH to VCC only by internal 100kOhm resistor, HSB driver is disabled.