CY28343 Cypress Semiconductor, CY28343 Datasheet - Page 4

• Manufacturer Part Number: CY28343
• Description: Zero Delay SDR/DDR Clock Buffer
• Manufacturer: Cypress Semiconductor

Table 4. Byte Read and Byte Write Protocol
Byte 0: Output Register (1 = Enable, 0 = Disable)
Byte 1: Output Register (1 = Enable, 0 = Disable)
Note:
Document #: 38-07369 Rev. *A
4.
1
2:8
9
10
11:18
19
20:27
28
29
Bit
Bit
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Bit
These bits will be ignored in DDR mode. See Table 1 on page 1.
@Pup
@Pup
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Start
Slave address – 7 bits
Write
Acknowledge from slave
Command Code - 8 bits'1xxxxxxx' stands for
byte operationbit[6:0] of the command code rep-
resents the offset of the byte to be accessed
Acknowledge from slave
Byte Count – 8 bits
Acknowledge from slave
stop
Byte Write Protocol
29,30
31,32
35,36
37,38
41,42
43,44
Pin #
Pin #
48
12
11
9
8
5
4
3
2
Description
DDRT/C0. 1 = Enable, 0 = Output disabled asynchronously in a low state
DDRT/C1. 1 = Enable, 0 = Output disabled asynchronously in a low state
DDRT/C2. 1 = Enable, 0 = Output disabled asynchronously in a low state
DDRT/C3. 1 = Enable, 0 = Output disabled asynchronously in a low state
DDRT/C4. 1 = Enable, 0 = Output disabled asynchronously in a low state
DDRT/C5. 1 = Enable, 0 = Output disabled asynchronously in a low state
Reserved
SELDDR_DDR hardware setting value. Read only.
SDRAM7. 1 = Enable, 0 = Output disabled asynchronously in a low state
SDRAM6. 1 = Enable, 0 = Output disabled asynchronously in a low state
SDRAM5. 1 = Enable, 0 = Output disabled asynchronously in a low state
SDRAM4. 1 = Enable, 0 = Output disabled asynchronously in a low state
SDRAM3. 1 = Enable, 0 = Output disabled asynchronously in a low state
SDRAM2. 1 = Enable, 0 = Output disabled asynchronously in a low state
SDRAM1. 1 = Enable, 0 = Output disabled asynchronously in a low state
SDRAM0. 1 = Enable, 0 = Output disabled asynchronously in a low state
1
2:8
9
10
11:18
19
20
21:27
28
29
30:37
38
39
[4]
[4]
Bit
Description
Description
Slave address – 7 bits
Acknowledge from slave
Acknowledge from slave
Slave address – 7 bits
Start
Write
Command Code – 8 bits'1xxxxxxx' stands for
byte operationbit[6:0] of the command code rep-
resents the offset of the byte to be accessed
Repeat start
Read
Acknowledge from slave
Data byte from slave – 8 bits
Not Acknowledge
stop
Byte Read Protocol
Description
CY28343
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