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參數(shù)資料
| 型號(hào)： | SMS8198SA |
| 廠商： | Summit Microelectronics, Inc. |
| 英文描述： | Philips TriMedia⑩ Processor Companion Supervisor With a 16K-bit 2-wire Serial Memory |
| 中文描述： | ⑩飛利浦代TriMedia處理器伴侶監(jiān)憑借16K的位2線串行存儲(chǔ)器 |
| 文件頁數(shù)： | 8/14頁 |
| 文件大?。?/td> | 84K |
| 代理商： | SMS8198SA |
8
SMS8198
2036 5.0 4/18/00
Figure 8. Current Address Byte Read Mode
Figure 7. Acknowledge Polling
Acknowledge Polling
When the SMS8198 is performing an internal WRITE
operation, it will ignore any new START conditions. Since
the device will only return an acknowledge after it accepts
the START, the part can be continuously queried until an
acknowledge is issued, indicating that the internal WRITE
cycle is complete.
To poll the device, give it a START condition, followed by
a slave address for a WRITE operation (See Figure 7).
READ OPERATIONS
Read operations are initiated with the R/W bit of the
identification field set to
“
1.
”
There are four different read
options:
1.
2.
3.
4.
Current Address Byte Read
Random Address Byte Read
Current Address Sequential Read
Random Address Sequential Read
Current Address Byte Read
The SMS8198 contains an internal address counter
which maintains the address of the last word accessed,
incremented by one. If the last address accessed (either
a read or write) was to address location n, the next read
operation would access data from address location n+1
and increment the current address pointer. When the
SMS8198 receives the slave address field with the R/W
bit set to
“
1,
”
it issues an acknowledge and transmits the
8-bit word stored at address location n+1.
The current address byte read operation only accesses a
single byte of data. The master does not acknowledge the
transfer, but does generate a stop condition. At this point,
the SMS8198 discontinues data transmission. See Fig-
ure 8 for the address acknowledge and data transfer
sequence.
Issue Start
Internal WRITE Cycle
In Progress;
Begin ACK Polling
Issue Slave
Address and
R/W = 0
ACK
Returned
Next
operation a
WRITE
Issue Byte
Address
Proceed with
WRITE
Issue Stop
Await Next
Command
Issue Stop
No
No
Yes (Internal WRITE Cycle is completed)
Yes
2036 ILL9.0
S
T
A
R
T
S
T
O
P
Slave Address
Device
Type
Address
Read/Write
1= Read
A10,A9,A8
SDA Bus Activity
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
Master sends Read
request to Slave
Slave sends
Data to Master
Slave Transmitter
to
Master Receiver
Master Transmitter
to
Slave Receiver
1
1
1
0
0
1
Lack of ACK (low)
from Master
determines last
data byte to be read
1
Shading Denotes
SMS8198
SDA Output Active
A
9
A
10
R
W
A
C
K
A
8
Data Byte
2036 ILL10.0
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| SMS8198SB | 制造商:SUMMIT 制造商全稱:SUMMIT 功能描述:Philips TriMedia⑩ Processor Companion Supervisor With a 16K-bit 2-wire Serial Memory |
| SMS840 | 制造商:SECOS 制造商全稱:SeCoS Halbleitertechnologie GmbH 功能描述:0.13A , 50V , RDS(ON) 10 P-Channel Enhancement MOSFET |
| SMS9CH-2Z17 | 制造商:SOURIAU 功能描述:Conn Qikmate HDR 9 POS 5.08mm Solder ST Thru-Hole |
| SMS9CSB1 | 功能描述:集管和線殼 Protection Shroud 9P Pnl Mnt Pin Recpt RoHS:否 產(chǎn)品種類:1.0MM Rectangular Connectors 產(chǎn)品類型:Headers - Pin Strip 系列:DF50 觸點(diǎn)類型:Pin (Male) 節(jié)距:1 mm 位置/觸點(diǎn)數(shù)量:16 排數(shù):1 安裝風(fēng)格:SMD/SMT 安裝角:Right 端接類型:Solder 外殼材料:Liquid Crystal Polymer (LCP) 觸點(diǎn)材料:Brass 觸點(diǎn)電鍍:Gold 制造商:Hirose Connector |
| SMS9GE3 | 制造商:SOURIAU 功能描述:SOCKET PCB 9WAY 制造商:Souriau 功能描述:Conn Qikmate F 9 POS 5.08mm Solder ST Thru-Hole |
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