JS28F256P30T95 Micron Technology Inc, JS28F256P30T95 Datasheet - Page 42

• Manufacturer Part Number: JS28F256P30T95
• Manufacturer: Micron Technology Inc

Specifications of JS28F256P30T95

• Cell Type: NOR
• Density: 256Mb
• Access Time (max): 95/17ns
• Interface Type: Parallel/Serial
• Boot Type: Top
• Address Bus: 24b
• Operating Supply Voltage (typ): 1.8V
• Operating Temp Range: -40C to 85C
• Package Type: TSOP
• Program/erase Volt (typ): 1.7 to 2/8.5 to 9.5V
• Sync/async: Async/Sync
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 1.7V
• Operating Supply Voltage (max): 2V
• Word Size: 16b
• Number Of Words: 16M
• Supply Current: 28mA
• Mounting: Surface Mount
• Pin Count: 56
• Lead Free Status / Rohs Status: Compliant

Table 19: Read Configuration Register Description (Sheet 2 of 2)
11.2.1
11.2.2
Datasheet
42
13:11
10
9
8
7
6
5:4
3
2:0
Note:
Latency Code 2, Data Hold for a 2-clock data cycle (DH = 1) WAIT must be deasserted with valid data (WD = 0).
Latency Code 2, Data Hold for a 2-cock data cycle (DH=1) WAIT deasserted one data cycle before valid data (WD = 1)
combination is not supported.
shown using the QUAD+ package. For EASY BGA and TSOP packages, the table reference should be adjusted using
address bits A[16:1].
Latency Count (LC[2:0])
Wait Polarity (WP)
Data Hold (DH)
Wait Delay (WD)
Burst Sequence (BS)
Clock Edge (CE)
Reserved (R)
Burst Wrap (BW)
Burst Length (BL[2:0])
Read Mode
The Read Mode (RM) bit selects synchronous burst-mode or asynchronous page-mode
operation for the device. When the RM bit is set, asynchronous page mode is selected
(default). When RM is cleared, synchronous burst mode is selected.
Latency Count
The Latency Count (LC) bits tell the device how many clock cycles must elapse from the
rising edge of ADV# (or from the first valid clock edge after ADV# is asserted) until the
first valid data word is to be driven onto DQ[15:0]. The input clock frequency is used to
determine this value and
settings of LC. The maximum Latency Count for P30 would be Code 4 based on the Max
Clock frequency specification of 52 mhz, and there will be zero WAIT States when
bursting within the word line. Please also refer to
Considerations” on page 47
Refer to
Code Settings.
Table 20, “Latency Count (LC) and Frequency Support” on page 43
Table 19, “Read Configuration Register Description” on page 41
010 =Code 2
011 =Code 3
100 =Code 4
101 =Code 5
110 =Code 6
111 =Code 7 (default)
(Other bit settings are reserved)
0 =WAIT signal is active low
1 =WAIT signal is active high (default)
0 =Data held for a 1-clock data cycle
1 =Data held for a 2-clock data cycle (default)
0 =WAIT deasserted with valid data
1 =WAIT deasserted one data cycle before valid data (default)
0 =Reserved
1 =Linear (default)
0 = Falling edge
1 = Rising edge (default)
Reserved bits should be cleared (0)
0 =Wrap; Burst accesses wrap within burst length set by BL[2:0]
1 =No Wrap; Burst accesses do not wrap within burst length (default)
001 =4-word burst
010 =8-word burst
011 =16-word burst
111 =Continuous-word burst (default)
(Other bit settings are reserved)
Figure 13
for more information on EOWL.
shows the data output latency for the different
“End of Word Line (EOWL)
for Latency
August 2008
306666-12
is
P30