pxb4219 Infineon Technologies Corporation, pxb4219 Datasheet - Page 97

• Manufacturer Part Number: pxb4219
• Description: Iwe8 Interworking Element For 8 E1/t1 Lines
• Manufacturer: Infineon Technologies Corporation

5.1.2
The Generic Interface Mode (GIM) makes the framer interface more universal, so that
other framer/ line interface units or T1/E1 transceivers can be connected directly to the
IWE8. Depending on the E1/T1 pin, the interface can be adopted to line bit rates of 1.544
MHz (T1 rate) or 2.048 MHz (E1 rate). The mode is enabled by setting bit om = 01
“opmo”, see
switching to GIM.
5.1.2.1
FRCLK[0:7]
FRDAT[0:7]
FRMFB[0:7]
FRFRS[0:7]
FRLOS[0:7]
FTCKO[0:7]
Data Sheet
Generic Interface Mode (GIM)
T1 Mode
Chapter
7.24. Make sure that no clocks are applied to the transmitter when
Framer Receive Clock
Receive clock input at 1.544 MHz
Framer Receive Data
depending on bit “frri” in “opmo”:
0 =
1 =
Framer Receive Multiframe Begin
Depending on bits p_ces in pcfN:
Depending on bit “rfpp” in “opmo”:
FRMFB is always sampled with the falling edge of FRCLK.
Framer Receive Frame Synchronization Pulse
Permanently inactive
Framer Receive Loss of Signalling
Framer Transmit Clock
depending on bits ftckn in ftcs:
00 =
01 =
0 =
1 =
0 =
1 =
FRDAT is sampled with the falling edge of FRCLK
FRDAT is sampled with the rising edge of FRCLK
Structured CES: A pulse on this pin designates the
first frame of a new multiframe
Unstructured CES: Unused, no constant level
allowed
FRMFB is active low
FRMFB is active high
depending on bit “rts_eval” in “opmo”:
0 = Transmit clock input with 1.544 MHz
1 = Clock of ICRC is used as transmit clock and is
also switched to FTCKO pins (FTCKO is output
pin)
FRCLK
97
PXB4219 / PXB4220 / PXB4221
Interface Description
2002-05-06
B
in