XRT86L30
REV. 1.0.1
SINGLE T1/E1/J1 FRAMER/LIU COMBO
4.6
T1/E1 Serial PCM Interface
The most common mode is the standard serial PCM interface. Within this mode, only the serial data, serial
clock, frame pulse and multi-frame pulse are required for both the transmit and receive paths. For the transmit
path, only TxSER is a dedicated input to the device. All other signals to the transmit path in Figure 12 can be
programmed as either input or output. For the receive path, only RxSER and RxMSYNC are dedicated outputs
from the device. All other signals in the receive path in Figure 13 can be programmed as either input or
output.
F
IGURE 12. TRANSMIT T1/E1 SERIAL PCM INTERFACE
T1
TxSER
F
TS1
TS2
TS24
TxSERclk
(bi-directional)
TxSYNC
(bi-directional)
TxMSYNC
(bi-directional)
N :
SF :
T1DM :
SLC-96 :
ESF :
TxMSYNC = 4 * (TxSYNC)
TxMSYNC = 12 * (TxSYNC)
TxMSYNC = 12 * (TxSYNC)
TxMSYNC = 12 * (TxSYNC)
TxMSYNC = 24 * (TxSYNC)
TS1
TS2
TS32
E1
TxSER
TxSERclk
(bi-directional)
TxSYNC
(bi-directional)
TxMSYNC
(bi-directional)
TxMSYNC = 16 * (TxSYNC)
F
IGURE 13. RECEIVE T1/E1 SERIAL PCM INTERFACE
T1
RxSER
F
TS1
TS2
TS24
RxSERcl
k
(bi-directional)
RxSYNC
(bi-directional)
RxCRCSYNC
N :
SF :
T1DM :
SLC-96 :
ESF :
RxCRCSYNC = 4 * (RxSYNC)
RxCRCSYNC = 12 * (RxSYNC)
RxCRCSYNC = 12 * (RxSYNC)
RxCRCSYNC = 12 * (RxSYNC)
RxCRCSYNC = 24 * (RxSYNC)
E1
TS1
TS2
TS32
RxSER
RxSERcl
k
(bi-directional)
RxSYNC
(bi-directional)
RxCASYNC = 16 * (RxSYNC)
RxCASYNC
148
EXAR [ EXAR CORPORATION ]
