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參數資料
| 型號： | ADM1060 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | DIP Socket; No. of Contacts:56; Pitch Spacing:0.07"; Row Spacing:0.6"; Terminal Type:PC Board; Leaded Process Compatible:Yes; Peak Reflow Compatible (260 C):No RoHS Compliant: Yes |
| 中文描述： | 通信系統監控/排序電路 |
| 文件頁數： | 42/45頁 |
| 文件大小： | 303K |
| 代理商： | ADM1060 |
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ADM1060
PROGRAMMNGADM1060
–
42
–
REV. PrJ 11/02
PRELIMINARY TECHNICAL DATA
5.T he slave asserts ACK on SDA.
6.T he master asserts a repeat start condition on SDA.
7.T he master sends the 7-bit slave address followed by the
read bit (high).
8.T he slave asserts ACK on SDA.
9.T he ADM1060 sends a byte count data byte that tells
the master how many data bytes to expect. T he ADM1060
will always return 32 data bytes (20h), which is the maxi-
mum allowed by the SMBus 1.1 specification.
10. T he master asserts ACK on SDA.
11. T he master receives 32 data bytes.
12. T he master asserts ACK on SDA after each data byte.
13. T he master asserts a ST OP condition on SDA to end
the transaction.
S
SLAVE
ADDRESS
W
A
COMMAND FDh
(BLOCK READ)
BYTE
COUNT
A
DATA 1
DATA
32
A
A
A S
SLAVE
ADDRESS
R A
1
2
3
4
5
6
7
8
9
10
11
12
13 14
P
Figure 9h. Block Read From EEPROM or RAM
E RROR C ORRE C T ION
T he ADM1060 provides the option of issuing a PEC
(Packet Error Correction) byte after a write to RAM, a
write to EEPROM, a block write to RAM/EEPROM or a
block read from RAM/EEPROM. T his enables the user
to verify that the data received by or sent from the
ADM1060 is correct. T he PEC byte is an optional byte
sent after that last data byte has been written to or read
from the ADM1060. T he protocol is as follows:-
1.T he ADM1060 issues a PEC byte to the master. T he
master should check the PEC byte and issue another block
read if the PEC byte is incorrect.
2. A NACK is generated after the PEC byte to signal the
end of the read.
Note:
T he PEC byte is calculated using CRC-8. T he
Frame Check Sequence (FCS) conforms to CRC-8 by the
polynomial:-
C(x) = x
8
+ x
2
+ x
1
+ 1
Consult SMBus 1.1 specification for more information.
An example of a block read with the optional PEC byte is
shown in figure 9i below.
S
SLAVE
ADDRESS
W
A
COMMAND FDh
(BLOCK READ)
BYTE
COUNT
A
DATA 1
PEC
DATA
32
A
A
A S
SLAVE
ADDRESS
R A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
P
15
Figure 9i. Block Read From EEPROM or RAM with PEC
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