SI3019-F-FM Silicon Laboratories Inc, SI3019-F-FM Datasheet - Page 52

• Manufacturer Part Number: SI3019-F-FM
• Description: IC VOICE DAA GCI/PCM/SPI 20-QFN
• Manufacturer: Silicon Laboratories Inc
• Series: -r

Specifications of SI3019-F-FM

• Function: Data Access Arrangement (DAA)
• Interface: GCI, PCM, SPI
• Number Of Circuits: 1
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 8.5mA
• Power (watts): *
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-VFQFN Exposed Pad
• Includes: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Si3050 + Si3011/18/19
The Idle state is achieved by the MX and MR bits being held inactive (signal is high) for two or more frames. When
a transmission is initiated by a host device, an active state (signal is low) is present on the downstream MX bit. This
signals to the Si3050 that a transmission has begun on the Monitor channel and the Si3050 should begin accepting
data from host device. The Si3050, after reading the data on the Monitor channel, acknowledges the initial
transmission by placing the upstream MR bit in an active state. The data is received and the upstream MR
becomes active in the frame immediately following the downstream MX becoming active. The upstream MR then
remains active until either the next byte is received or an end of message is detected. The end of message is
signaled by the downstream MX being held inactive for two or more consecutive frames. Receipt of initial data is
signaled by the upstream MR bit’s transitioning from an inactive to an active state. Upon receiving
acknowledgement from the Si3050 that the initial data is received, the host device places the downstream MX bit in
the inactive state for one frame and then either transmit another byte by placing the downstream MX bit in an active
state again, or signal an end of message by leaving the downstream MX bit inactive for a second frame.
When the host is performing a write command, the host only manipulates the downstream MX bit, and the Si3050
only manipulates the upstream MR bit. If a read command is performed, the host initially manipulates the
downstream MX bit to communicate the command, but then manipulates the downstream MR bit in response to the
Si3050 responding with the requested data. Similarly, the Si3050 initially manipulates its upstream MR bit to
receive the read command, and then manipulates its upstream MX bit to respond with the requested data. If the
host is transmitting data, the Si3050 always transmits a $FF value on its Monitor data byte. While the Si3050 is
transmitting data, the host should always transmit a $FF value on its Monitor byte. If the Si3050 is transmitting data
and detects a value other than a $FF on the downstream Monitor byte, the Si3050 signals an Abort.
For read and write commands, an initial address must be specified. The Si3050 responds to a read or a write
command at this address, and then subsequently increment this address after every register access.
52
Transm itter
Receiver
MX
MX
MR
MR
1st Byte
Figure 44. Monitor Handshake Timing
1st Byte
ACK
125
2nd Byte

Rev. 1.4
s
2nd Byte
ACK
3rd Byte
3rd Byte
ACK