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)： 14/39頁(yè)
文件大?。?/td> 460K
代理商： SST49LF004B
14
Data Sheet
4 Mbit LPC Firmware Flash
SST49LF004B
2003 Silicon Storage Technology, Inc.
S71232-02-000
12/03
LPC Memory Read Cycle
FIGURE 6: LPC M
EMORY
R
EAD
C
YCLE
W
AVEFORM
TABLE
6: LPC M
EMORY
R
EAD
C
YCLE
F
IELD
D
EFINITIONS
Clock
Cycle
1
Field
Name
START
Field Contents
LAD[3:0]
1
0000
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 (0000b) indicate an LPC
Memory cycle.
Indicates the type of LPC Memory cycle. Bits 3:2 must be “01b” for
memory cycle. Bit 1 indicates the type of transfer “0” for Read. Bit 0 is
reserved.
Address Phase for Memory Cycle. LPC protocol supports a 32-
bit address phase. YYYY is one nibble of the entire address.
Addresses are transferred most-significant nibble first.
In this clock cycle, the host drives the bus to all 1s and then
floats the bus. This is the first part of the bus “turnaround cycle.”
The SST49LF004B takes control of the bus during this cycle.
2
CYCTYPE
+ DIR
010X
IN
3-10
ADDR
YYYY
IN
11
TAR0
1111
IN
then Float
Float
then OUT
OUT
12
TAR1
1111 (float)
13
SYNC
0000
The SST49LF004B outputs the value 0000b indicating that it
has received data.
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 1s and then
floats the bus. This is the first part of the bus “turnaround cycle.”
The SST49LF004B takes control of the bus during this cycle.
14
15
16
DATA
DATA
TAR0
ZZZZ
ZZZZ
1111
OUT
OUT
IN
then Float
Float
then OUT
17
TAR1
1111 (float)
T6.0 1232
1232 F05.1
LCLK
LFRAME#
LAD[3:0]
0000b
010Xb
A[23:20]
A[19:16]
A[3:0]
A[7:4]
A[11:8]
A[15:12]
1111b
Tri-State
2 Clocks
TAR0
Load Address in 8 Clocks
Address
1 Clock 1 Clock
Start
CY+
DIR
TAR
1 Clock
Sync
Data
Data Out 2 Clocks
0000b
D[7:4]
D[3:0]
A[31:28] A[27:24]
TAR1
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:Silicon Storage Technology, Inc 功能描述:4 Mbit Firmware Hub
SST49LF004B_10 制造商:SST 制造商全稱: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: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: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)總線寬度:1 bit 存儲(chǔ)類型:Flash 存儲(chǔ)容量:2 MB 結(jié)構(gòu):256 K x 8 定時(shí)類型: 接口類型:SPI 訪問(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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