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参数资料
| 型号： | S29CL032J0JFAM020 |
| 厂商： | SPANSION LLC |
| 元件分类： | PROM |
| 英文描述： | 1M X 32 FLASH 3.3V PROM, 54 ns, PBGA80 |
| 封装： | 13 X 11 MM, 1 MM PITCH, FORTIFIED, BGA-80 |
| 文件页数： | 18/79页 |
| 文件大小： | 2994K |
| 代理商： | S29CL032J0JFAM020 |
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March 30, 2009 S29CD-J_CL-J_00_B3
S29CD-J & S29CL-J Flash Family
25
Data
She e t
Like the main memory access, the Secured Silicon Sector memory is accessed with the same burst or
asynchronous timing as defined in the Configuration Register. However, the user must recognize burst
operations past the 256 byte Secured Silicon boundary returns invalid data.
Burst read operations occur only to the main flash memory arrays. The Configuration Register and protection
bits are treated as single cycle reads, even when burst mode is enabled. Read operations to these locations
results in the data remaining valid while OE# is at VIL, regardless of the number of CLK cycles applied to the
device.
8.4.1
2-, 4-, 8- Double Word Linear Burst Operation
In a linear burst read operation, a fixed number of words (2, 4, or 8 double words) are read from consecutive
addresses that are determined by the group within which the starting address falls. Note that 1 double word =
32 bits. See Table 8.2 for all valid burst output sequences.
The IND/WAIT# signal, or End of Burst Indicator signal, transitions active (VIL) during the last transfer of data
in a linear burst read before a wrap around. This transition indicates that the system should initiate another
ADV# to start the next burst access. If the system continues to clock the device, the next access wraps
around to the starting address of the previous burst access. The IND/WAIT# signal is floating when not active.
Notes
1. The default configuration in the Control Register for Bit 6 is “1,” indicating that the device delivers data on the rising edge of the CLK
signal.
2. The device is capable of holding data for one CLK cycle.
3. If RESET# is asserted low during a burst access, the burst access is immediately terminated and the device defaults back to
asynchronous read mode. When this happens, the DQ data bus signal floats and the Configuration Register contents are reset to their
default conditions.
4. CE# must meet the required burst read setup times for burst cycle initiation. If CE# is taken to VIH at any time during the burst linear or
burst cycle, the device immediately exits the burst sequence and floats the DQ bus signal.
5. Restarting a burst cycle is accomplished by taking CE# and ADV# to VIL.
6. A burst access is initiated and the address is latched on the first rising CLK edge when ADV# is active or upon a rising ADV# edge,
whichever occurs first. If the ADV# signal is taken to VIL prior to the end of a linear burst sequence, the previous address is discarded and
subsequent burst transfers are invalid. A new burst is initiated when ADV# transitions back to VIH before a clock edge.
7. The OE# (Output Enable) pin is used to enable the linear burst data on the DQ data bus pin. De-asserting the OE# pin to VIH during a
burst operation floats the data bus, but the device continues to operate internally as if the burst sequence continues until the linear burst
is complete. The OE# pin does not halt the burst sequence, The DQ bus remains in the float state until OE# is taken to VIL.
8. Halting the burst sequence is accomplished by either taking CE# to VIH or re-issuing a new ADV# pulse.
The IND/WAIT# signal is controlled by the OE# signal. If OE# is at VIH, the IND/WAIT# signal floats and is not
driven. If OE# is at VIL, the IND/ WAIT# signal is driven at VIH until it transitions to VIL, indicating the end of
the burst sequence. Table 8.3 lists the valid combinations of the Configuration Register bits that impact the
IND/WAIT# timing. See Figure 8.3 for the IND/WAIT# timing diagram.
Table 8.2 32-Bit Linear and Burst Data Order
Data Transfer Sequence
Output Data Sequence
(Initial Access Address)
Two Linear Data Transfers
0-1 (A0 = 0)
1-0 (A0 = 1)
Four Linear Data Transfers
0-1-2-3 (A1-A0 = 00)
1-2-3-0 (A1-A0 = 01)
2-3-0-1 (A1-A0 = 10)
3-0-1-2 (A1-A0 = 11)
Eight Linear Data Transfers
0-1-2-3-4-5-6-7 (A2-A0 = 000)
1-2-3-4-5-6-7-0 (A2-A0 = 001)
2-3-4-5-6-7-0-1 (A2-A0 = 010)
3-4-5-6-7-0-1-2 (A2-A0 = 011)
4-5-6-7-0-1-2-3 (A2-A0 = 100)
5-6-7-0-1-2-3-4 (A2-A0 = 101)
6-7-0-1-2-3-4-5 (A2-A0 = 110)
7-0-1-2-3-4-5-6 (A2-A0 = 111)
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