W83793G Datasheet, PDF (99/131 Pages) Winbond – Winbond H/W Monitor

W83793G
17
1 18
18
18
11
S Slave Address Wr A Command
A Write Data
A PEC
AP
Control Device
Address
0
0
Control
Command
0
Control
Value
Data ₀
CRC
Checksum
0
‘S’ represents “Start” Cycle of SMBus transaction, ‘Wr’ means “Write” Flag, ‘A’ means “Acknowledge”
from W83793G, and ‘P’ indicates a “Stop” Cycle. All letter in shadow means it is a response from
W83793G; otherwise it is a host transmitted signal.
Last row above shows what is each data meaning, where Control Device Address is the address
assigned in the ARP process, Control Command is specified in above registers, and Control Data
option is not supported in W83793G, thus with any value in this field W83793G will perform the same
action.
In Alert Standard Format Specification v2.0, there are two sections describe this. They are Section 5.4
at page 76, and Section 3.2.4.1 at page 33.
8.13.2 ASF Register Details
8.13.2.1 UDID Device Capability Register (UDIDDevCap)
SMBus Specification Working Group intends to use device capability to distinguish the arbitration
priority of GeneralGetUDID() first. Thus the very first byte the UDID is device capability, because
SMBus is a MSB first serial protocol and client sent low will win the arbitration. It is set as C1_HEX.
Location:
Type:
Reset:
UDIDVersion - Bank 1 Address 20_HEX
Read Only
No Reset.
BIT
Name
Reset
7
6
Address Type
1
1
UDIDDEVCAP
5
4
3
2
Reserved
0
0
0
0
1
0
PEC
0
1
BIT
DESCRIPTION
Address Type.
00_BIN: Fixed address device. It’s the highest priority device.
7-6 ^{01BIN: Dynamic and persistent address device.}
10_BIN: Dynamic and volatile address device. If power-down, the address needs to reassign
at next power on. W83793G ASF address will lost while VSB5V not exist.
11_BIN: Random number device.
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Publication Release Date: Dec. 11, 2006
Revision 1.0