Intel C2338 FH8065501516761 数据表
产品代码
FH8065501516761
Intel
®
Atom™ Processor C2000 Product Family for Microserver
September 2014
Datasheet, Vol. 2 of 3
Order Number: 330061-002US
435
Volume 2—SMBus 2.0 Unit 0 - PCU—C2000 Product Family
System Host Controller
18.3.1.7
Block Write-Block Read Process Call Command
The Block Write-Block Read Process Call command is a two-part message. The call
begins with a slave address and a write condition. After the command code, the host
issues a write byte count (M) that describes how many more bytes are written in the
first part of the message. If a master has 6 bytes to send, the byte count field has the
value 6 (0000 0110b), followed by the 6 bytes of data. The write byte count (M) cannot
be 0.
The second part of the message is a block of read data beginning with a repeated start
condition followed by the slave address and a read bit. The next byte is the read byte
count (N), which differs from the write byte count (M). The read byte count (N) cannot
be 0.
The combined data payload must not exceed 32 bytes. The byte-length restrictions of
this process call are summarized as follows:
• M 1 byte
• N 1 byte
• M + N 32 bytes
• N 1 byte
• M + N 32 bytes
Note:
No STOP condition is before the repeated START condition, and that a NACK signifies
the end of the read transfer.
See Section 5.5.8 of the System Management Bus (SMBus) Specification, Version 2.0
for the format of the protocol.