peb2035 ETC-unknow, peb2035 Datasheet - Page 12

• Manufacturer Part Number: peb2035
• Description: Communications Advanced Cmos Frame Aligner
• Manufacturer: ETC-unknow

1.3
P-LCC
Pin No.
8
10
11
12
13
14
15
16
17
Semiconductor Group
9
Pin Definitions and Functions (cont’d)
P-DIP
Pin No.
6
10
11
12
13
14
15
7
8
9
Symbol
XOID /
XMFB
D0
D1
D2
D3
D4
D5
D6
D7
V
DD
Input (I)
Output (O)
O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
Function
PCM 30: Transmit Optical Interface Data
Unipolar data sent to fibre optical interface with
2048 kbit/s. The output sense is programmed via
bit XC0.XDOS. Clocking off data is done with the
rising edge of XRCLK with 100 % duty cycle.
PCM 24: Transmit Multiframe Begin
The function depends on programming bit
ACR.MFBS:
MFBS = 1: XMFB marks the beginning of every
transmitted multiframe (XDI).
MFBS = 0: Marks the beginning of every
transmitted superframe. Additional pulses every
12 frames are provided when using ESF or F72
format. Status bits MFR.XMB and MFR.XRS
specify multiframe begin and the beginning of the
DL channel (F72 only).
In both cases the pulses which normally are two
frames long can be reset by writing a ’1’ to the
acknowledge bit XFDL.XMAK.
Note: If signal AFT is supplied for ’External
Multiframe Synchronization’ and a new multiframe
position is enforced, signal XMFB may be (for one
time) three or four frames long before the new
multiframe position has been settled.
Data Bus
8-bit bi-directional tristate data lines which
interface with the system’s data bus. These lines
carry data and control/status information to and
from the ACFA.
Power
+ 5 V power supply
12
PEB 2035