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參數(shù)資料
| 型號(hào)： | SST49LF004B |
| 廠商： | Silicon Storage Technology, Inc. |
| 英文描述： | 4 Mbit LPC Firmware Flash |
| 中文描述： | 4兆位LPC固件閃存 |
| 文件頁(yè)數(shù)： | 13/39頁(yè) |
| 文件大?。?/td> | 460K |
| 代理商： | SST49LF004B |
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Data Sheet
4 Mbit LPC Firmware Flash
SST49LF004B
13
2003 Silicon Storage Technology, Inc.
S71232-02-000
12/03
Firmware Memory Write Cycle
FIGURE 5: F
IRMWARE
M
EMORY
W
RITE
C
YCLE
W
AVEFORM
TABLE
5: F
IRMWARE
M
EMORY
W
RITE
C
YCLE
Clock
Cycle
1
Field
Name
START
Field Contents
LAD[3:0]
1
1110
1. Field contents are valid on the rising edge of the present clock cycle.
LAD[3:0]
Direction
IN
Comments
LFRAME# must be active (low) for the device to
respond. Only the last field latched before LFRAME#
transitions high will be recognized. The START field
contents (1110b) indicate a Firmware Memory Write
cycle.
Indicates which SST49LF004B device should
respond. If the IDSEL (ID select) field matches the
value of ID[3:0], the device will respond to the mem-
ory cycle.
These seven clock cycles make up the 28-bit memory
address. YYYY is one nibble of the entire address.
Addresses are transferred most-significant nibble first.
The MSIZE field indicates how many bytes will be
transferred during multi-byte operations. The device
only supports single-byte writes. MSIZE=0000b
ZZZZ is the least-significant nibble of the data byte.
ZZZZ is the most-significant nibble of the data byte.
In this clock cycle, the host drives the bus to all '1's and
then floats the bus prior to the next clock cycle. This is
the first part of the bus “turnaround cycle.”
The SST49LF004B takes control of the bus during this
cycle.
During this clock cycle, the device generates a “ready
sync” (RSYNC) indicating that the device has received
the input data.
In this clock cycle, the SST49LF004B drives the bus to
all '1's and then floats the bus prior to the next clock
cycle. This is the first part of the bus “turnaround
cycle.”
The host resumes control of the bus during this cycle.
2
IDSEL
0000 to 1111
IN
3-9
MADDR
YYYY
IN
10
MSIZE
0000 (1 Byte)
IN
11
12
13
DATA
DATA
TAR0
ZZZZ
ZZZZ
1111
IN
IN
IN then Float
14
TAR1
1111 (float)
Float then OUT
15
RSYNC
0000
OUT
16
TAR0
1111
OUT then Float
17
TAR1
1111 (float)
Float then IN
T5.0 1232
1232 F04.0
LFRAME#
LAD[3:0]
1110b
0000b
A[23:20]
A[19:16]
A[3:0]
A[7:4]
A[11:8]
A[15:12]
MADDR
Start
IDSEL
MSIZE
LCLK
A[27:24]
0000b
RSYNC
TAR1
TAR0
TAR
DATA
D[7:4]
Tri-State
D[3:0]
0000b
1111b
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SST49LF004B-33-4C-EI | 4 Mbit LPC Firmware Flash |
| SST49LF004B-33-4C-EIE | 4 Mbit LPC Firmware Flash |
| SST49LF004B-33-4C-NH | 4 Mbit LPC Firmware Flash |
| SST49LF004B-33-4C-NHE | 4 Mbit LPC Firmware Flash |
| SST49LF040 | 4 Mbit LPC Flash |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SST49LF004B_06 | 制造商:SST 制造商全稱(chēng):Silicon Storage Technology, Inc 功能描述:4 Mbit Firmware Hub |
| SST49LF004B_10 | 制造商:SST 制造商全稱(chēng):Silicon Storage Technology, Inc 功能描述:4 Mbit Firmware Hub |
| SST49LF004B-33-4C-EI | 制造商:SST 制造商全稱(chēng):Silicon Storage Technology, Inc 功能描述:4 Mbit LPC Firmware Flash |
| SST49LF004B-33-4C-EIE | 制造商:SST 制造商全稱(chēng):Silicon Storage Technology, Inc 功能描述:4 Mbit LPC Firmware Flash |
| SST49LF004B-33-4C-NH | 功能描述:閃存 512K X 8 33ns RoHS:否 制造商:ON Semiconductor 數(shù)據(jù)總線(xiàn)寬度:1 bit 存儲(chǔ)類(lèi)型:Flash 存儲(chǔ)容量:2 MB 結(jié)構(gòu):256 K x 8 定時(shí)類(lèi)型: 接口類(lèi)型:SPI 訪(fǎng)問(wèn)時(shí)間: 電源電壓-最大:3.6 V 電源電壓-最小:2.3 V 最大工作電流:15 mA 工作溫度:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
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