1 – Read
0 – Write
A – Acknowledge (SDA LOW)
N – Not Acknowledge (SDA HIGH)
S – START condition
P – STOP condition
Read Operation – Single Byte
S 0 A Reg Addr [7:0]Slv Addr [6:0] A P
Read Operation - Burst (Auto Address Increment)
Reg Addr +1
S 1 ASlv Addr [6:0] Data [7:0] PN
S 0 A Reg Addr [7:0]Slv Addr [6:0] A P
S 1 ASlv Addr [6:0] Data [7:0] A PNData [7:0]
Host
Clock IC
Host
Clock IC
Figure 11.5. I
2
C Read Operation
The SMBUS interface requires a timeout. The error flags are found in the registers listed below.
Table 11.2. SMBus Timeout Error Bit Indicators
Register Name Hex Address [Bit
Field]
Function
SMBUS_TIMEOUT 0x000C[5] 1 if there is a SMBus timeout error.
SMBUS_TIME-
OUT_FLG
0x0011[5] 1 if there is a SMBus timeout error.
Si5391 Reference Manual • Serial Interface
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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