PEB2075N-V13TR Infineon Technologies, PEB2075N-V13TR Datasheet - Page 32

• Manufacturer Part Number: PEB2075N-V13TR
• Description: IC CONTROLLER D-CH EXCH 44-PLCC
• Manufacturer: Infineon Technologies

Specifications of PEB2075N-V13TR

• Controller Type: Digital Exchange Controller
• Interface: PCM
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 10mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: PEB2075N-V13INTR; PEB2075N-V13TR

Transmission of Frames
2 x 32 bytes of intermediate storage are provided per HDLC controller in the transmit direction. After
up to 32 bytes have been written to the FIFO, transmission is started by a software command (XHF).
If the previous transmission is still underway when a new transmission command is issued,
microcontroller access to the FIFO will be blocked until the first transmission is completed
(figure 11). This means that at most one complete frame may be written to the FIFO before a
transmission is initiated. If a transmission request does not include a "frame end" indicator (XME),
the HDLC controller will request the next data block via an interrupt if the FIFO contains no more
than 32 bytes. This procedure will be repeated until the microcontroller indicates that the frame is
to be closed.
In the case when this indication is not given and there is no more data ready for transmission, the
frame is terminated with an abort sequence and the microcontroller is notified via a transmit data
underrun (XDU) interrupt. The frame may also be aborted per software command. The completed
transmission of an HDLC frame is reported by an XPR (Transmit Pool Ready) interrupt status.
Figure 11
Transmit FIFO
Semiconductor Group
a)
Inacces-
sible
to C
Acces-
sible
to C
Prior to Transmission
Command for Frame n + 1
Frame n + 1
Frame n
Trans-
mission
b)
Inacces-
sible
to C
Inacces-
sible
to C
After Transmission
Command for Frame n + 1
Frame n + 1
Frame n
32
Trans-
mission
Functional Description
c)
Inacces-
sible
to C
Acces-
sible
to C
After Interrupt
"Transmit Pool Ready"
Frame n+1
ITD03538
Trans-
mission