SST34HF32A4-70-4E-L1PE SST [Silicon Storage Technology, Inc], SST34HF32A4-70-4E-L1PE Datasheet - Page 6

• Manufacturer Part Number: SST34HF32A4-70-4E-L1PE
• Description: 32 Mbit Concurrent SuperFlash + 16 Mbit PSRAM ComboMemory
• Manufacturer: SST [Silicon Storage Technology, Inc]

Preliminary Specifications
Software Data Protection (SDP)
The SST34HF32A4 provide the JEDEC standard Software
Data Protection scheme for all data alteration operations,
i.e., Program and Erase. Any Program operation requires
the inclusion of the three-byte sequence. The three-byte
load sequence is used to initiate the Program operation,
providing optimal protection from inadvertent Write opera-
tions, e.g., during the system power-up or power-down.
Any Erase operation requires the inclusion of six-byte
sequence. The SST34HF32A4 are shipped with the Soft-
ware Data Protection permanently enabled. See Table 6 for
the specific software command codes. During SDP com-
mand sequence, invalid commands will abort the device to
Read mode within T
“Don’t Care” during any SDP command sequence.
Common Flash Memory Interface (CFI)
These devices also contain the CFI information to
describe the characteristics of the devices. In order to
enter the CFI Query mode, the system must write the
three-byte sequence, same as the Software ID Entry com-
mand with 98H (CFI Query command) to address
BK
CFI Query mode, the system can also use the one-byte
sequence with BK
See Figure 17 for CFI Entry and Read timing diagram.
Once the device enters the CFI Query mode, the system
can read CFI data at the addresses given in Tables 7
through 9. The system must write the CFI Exit command
to return to Read mode from the CFI Query mode.
Security ID
The SST34HF32A4 devices offer a 136-word Security ID
space. The Secure ID space is divided into two seg-
ments—one 128-bit factory programmed segment and one
128-word (256-byte) user-programmed segment. The first
segment is programmed and locked at SST with a unique,
128-bit number. The user segment is left un-programmed
for the customer to program as desired.
To program the user segment of the Security ID, the user
must use the Security ID Program command. End-of-Write
status is checked by reading the toggle bits. Data# Polling
is not used for Security ID End-of-Write detection. Once
programming is complete, the Sec ID should be locked
using the User-Sec-ID-Program-Lock-Out. This disables
any future corruption of this space. Note that regardless of
whether or not the Sec ID is locked, neither Sec ID seg-
ment can be erased. The Secure ID space can be queried
by executing a three-byte command sequence with Query-
©2006 Silicon Storage Technology, Inc.
X
555H in the last byte sequence. In order to enter the
X
55H on Address and 98H on Data Bus.
RC.
32 Mbit Concurrent SuperFlash + 16 Mbit PSRAM ComboMemory
The contents of DQ
15
-DQ
8
are
6
Sec-ID command (88H) at address 555H in the last byte
sequence. To exit this mode, the Exit-Sec-ID command
should be executed. Refer to Table 6 for more details.
Product Identification
The Product Identification mode identifies the device as the
SST34HF32A4 and manufacturer as SST. This mode may
be accessed by software operations only. The hardware
device ID Read operation, which is typically used by pro-
grammers cannot be used on this device because of the
shared lines between flash and PSRAM in the multi-chip
package. Therefore, application of high voltage to pin A
may damage this device. Users may use the software
Product Identification operation to identify the part (i.e.,
using the device ID) when using multiple manufacturers in
the same socket. For details, see Tables 5 and 6 for soft-
ware operation, Figure 16 for the Software ID Entry and
Read timing diagram and Figure 24 for the ID Entry com-
mand sequence flowchart.
TABLE 2: Product Identification
Note: BK = Bank Address (A
Product Identification Mode Exit
In order to return to the standard Read mode, the Software
Product Identification mode must be exited. Exit is accom-
plished by issuing the Software ID Exit command
sequence, which returns the device to the Read mode.
This command may also be used to reset the device to the
Read mode after any inadvertent transient condition that
apparently causes the device to behave abnormally, e.g.,
not read correctly. Please note that the Software ID Exit/
CFI Exit command is ignored during an internal Program or
Erase operation. See Table 6 for software command
codes, Figure 16 for timing waveform and Figure 24 for a
flowchart.
Manufacturer’s ID
Device ID
SST34HF32A4
20
-A
18
)
SST34HF32A4
ADDRESS
BK0000H
BK0001H
S71313-02-000
00BFH
7353H
DATA
T2.0 1313
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