參數(shù)資料
型號(hào): SST49LF020-33-4C-NH
廠商: SILICON STORAGE TECHNOLOGY INC
元件分類: PROM
英文描述: 2 Megabit LPC Flash
中文描述: 256K X 8 FLASH 3V PROM, 11 ns, PQCC32
封裝: PLASTIC, MS-016AE, LCC-32
文件頁數(shù): 24/48頁
文件大小: 724K
代理商: SST49LF020-33-4C-NH
24
Advance Information
4 Mbit LPC Flash
SST49LF040
2001 Silicon Storage Technology, Inc.
S71213-00-000
11/01 562
FIGURE 12: P
ROGRAM
C
YCLE
T
IMING
D
IAGRAM
(LPC M
ODE
)
562 ILL F11.1
LCLK
RST#
LFRAME#
LAD[3:0]
0000b
011Xb
A[23:20] A[19:16]
0101b
0101b
0101b
1010b
0101b
1010b
Tri-State
TAR
Load Address "YYYY 5555H" in 8 Clocks
Write the 1st command to the device in LPC mode.
Address1
1 Clock 1 Clock
1st Start
Write
Cycle
TAR
Sync
Data
Start next
1 Clock
1 Clock
2 Clocks
Load Data "AAH" in 2 Clocks
1111b
0000b
LCLK
RST# = VIH
LFRAME#
LAD[3:0]
0000b
011Xb
A[23:20] A[19:16]
1010b
1010b
1010b
0101b
0010b
0101b
Tri-State
TAR
Load Address "YYYY 2AAAH" in 8 Clocks
Write the 2nd command to the device in LPC mode.
Address1
1 Clock 1 Clock
2nd Start
Write
Cycle
TAR
Sync
Data
Start next
1 Clock
1 Clock
2 Clocks
Load Data "55H" in 2 Clocks
1111b
0000b
LCLK
RST# = VIH
LFRAME#
Load Address "YYYY 5555H" in 8 Clocks
Write the 3rd command to the device in LPC mode.
1 Clock 1 Clock
3rd Start
1 Clock
1 Clock
2 Clocks
Load Data "A0H" in 2 Clocks
LCLK
RST# = VIH
CE# = VIL
LFRAME#
LAD[3:0]
0000b
011Xb
A[23:20] A[19:16]
A[11:8]
A[7:4]
A[3:0]
D[7:4]
A[15:12]
D[3:0]
Tri-State
TAR
Load Ain in 8 Clocks
Write the 4th command (target locations to be programmed) to the device in LPC mode.
Address1
1 Clock
1 Clock
4th Start
Write
Cycle
TAR
Sync
Data
prInternal
prInternal
1 Clock
2 Clocks
Load Data in 2 Clocks
1111b
0000b
CE# = VIL
CE#
CE# = VIL
LAD[3:0]
0000b
011Xb
A[23:20] A[19:16]
0101b
0101b
0101b
1010b
0101b
0000b
Tri-State
TAR
Address1
TAR
Sync
Data
Start next
1111b
0000b
A[31:28] A[27:24]
A[31:28] A[27:24]
A[31:28] A[27:24]
Note 1: YYYYH must be within memory address range specified in Figures 4 and 5.
A[31:28] A[27:24]
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