16 Mbit Concurrent SuperFlash + 2 / 4 Mbit SRAM ComboMemory
SST34HF1621 / SST34HF1641
Data Sheet
1
TABLE 3: OPERATIONAL MODES SELECTION
Mode
BEF#
BES1# BES22 CIOs3
OE#
X
WE#
X
SA
X
LBS# UBS#
DQ0-7
DQ8-15
Full Standby
VIH
VIH
X
X
VIL
VIH
VIH
X
X
X
X
X
X
X
HIGH-Z
HIGH-Z
X
X
X
Output Disable
VIH
VIL
VIL
VIL
VIL
VIH
VIL
VIL
VIH
X
X
VIH
X
VIH
X
X
X
X
HIGH-Z
HIGH-Z
DOUT
DIN
HIGH-Z
HIGH-Z
DOUT
DIN
VIH
X
X
VIH
X
VIH
X
VIH
VIH
X
VIL
X
Flash Read
Flash Write
Flash Erase
SRAM Read
VIH
X
X
X
VIL
VIH
VIH
VIL
VIH
VIL
VIL
VIH
X
X
X
X
X
X
X
X
X
X
VIL
X
VIH
X
VIL
X
VIH
X
X
X
X
VIL
VIH
VIL
VIH
VIL
VIH
VIL
X
VIL
VIL
VIH
X
DOUT
HIGH-Z
DOUT
DOUT
DIN
DOUT
DOUT
HIGH-Z
HIGH-Z
DIN
VIH
VIH
VIL
VIL
VIH
VIH
VIL
VIH
VIL
X
VIH
VIL
SA
X
SRAM Write
VIL
VIH
VIL
X
VIL
VIL
VIH
X
HIGH-Z
DIN
DIN
HIGH-Z
VIH
VIL
VIL
VIH
X
VIH
X
VIL
X
X
VIL
VIH
SA
X
DIN
HIGH-Z
Product
VIL
X
X
Manufacturer’s ID5
Identification4
Device ID5
VIL
T3.6 523
1. X can be VIL or VIH, but no other value.
2. Do not apply BEF# = VIL, BES1# = VIL and BES2 = VIH at the same time
3. SRAM I/O configuration input CIOs; VIH = x16 (word mode), VIL = x8 (byte mode)
4. Software mode only
5. With A19-A1 = 0; SST Manufacturer’s ID = 00BFH, is read with A0 = 0,
SST34HF1621/1641 Device ID = 2761H, is read with A0 = 1
©2001 Silicon Storage Technology, Inc.
S71172-05-000 10/01 523
8
SST [ SILICON STORAGE TECHNOLOGY, INC ]
