AM79C901AJCT AMD [Advanced Micro Devices], AM79C901AJCT Datasheet - Page 27

• Manufacturer Part Number: AM79C901AJCT
• Description: HomePHY Single-Chip 1/10 Mbps Home Networking PHY
• Manufacturer: AMD [Advanced Micro Devices]

SCLK
SDO
SDI
CS
WRITE
WRITE
READ
READ
1
2
3
ST
01
01
Op Codes
SCLK
SCLK
SDO
4
SDO
SDI
CS
SDI
Op Codes
CS
5
Figure 11. Aborted Operation of the SPI Interface
OP
10
01
Figure 12. First Operation Following an Abort
1
Frame
6
1
Start
0000 = No Error/AAAA = Error Detected
0000 = No Error/AAAA = Error Detected
2
Error Code = AAAA
7
2
Command
Figure 10. SPI Read Operation
3
Read
8
3
P R E L I M I N A R Y
PHYADD
Op Codes
AAAAA
AAAAA
Table 3. SPI Op Codes
4
9
4
Error Code
Address
5
10
Am79C901A
Error Code = 0
SDO
SDI
Delimiter
6
11
15
End
Address
7
12
16
8
13
REGADD
RRRRR
RRRRR
17
Address
9
14
18
10
15
11
16
31
12
17
32
ED
10
10
Data Out
Data In
13
18
19
D15………D0
Don’t Care
Don’t Care
Data Out
D15...D0
30
Data In
31
22304B-12
22304B-13
22304B-14
32
27