W6691CD WINBOND [Winbond], W6691CD Datasheet - Page 61

• Manufacturer Part Number: W6691CD
• Description: ISDN S/T Interface Transceiver
• Manufacturer: WINBOND [Winbond]

XACT
state in order to transmit data.
Note: The transmitter is deactive after hardware reset or software reset.
S_RLPD
are looped to the transmitted 2B channels of S interface. The received D channel from the S interface is also
looped to transmitted D channel of S interface in the loopback function.
MFD
L2_DLP
looped to the received 2B+D channels. Note that after hardware reset, the internal clocks will turn off if the S
bus is not connected or if there is no signal on the S bus. In this case, the C/I command ECK must be issued
to enable loopback function.
S_RLP
are looped to the transmitted 2B channels of S interface. The received D channel from the S interface is not
looped to transmitted D channel of S interface in this loopback function.
.
8.7.5 Interrupt Status Register
Value after reset : 00H
D_RMR
Setting this bit activates the D_ch HDLC transmitter. This bit can be read. The transmitter must be in active
Setting this bit to "1" activates the remote loopback function. The received 2B channels from the S interface
This bit is used to enable or disable the multiframe structure on S/T interface :
Setting this bit activates the layer2 digital loopback function. The transmitted digital 2B+D channels are
Setting this bit to "1" activates the remote loopback function. The received 2B channels from the S interface
0 : Multiframe is enabled
1 : Multiframe is disabled
7
Multiframe Disable
Transmitter Active
Layer2 Digital Loopback
S Interface Remote Loopback
D_RME
S Interface Remote Loopback with D channel Loopback
6
D_XFR
5
INT1
4
ISTA
INT0
3
61
Read_clear
D_EXI
2
B1_EXI
1
Preliminary W6691
Publication Release Date: Sep 2001
Address 04H
B2_EXI
0
Revision 1.1