Rainbow Electronics DS26519 - Manual (Page 236)

DS26519 16-Port T1/E1/J1 Transceiver
236 of 310
Register Name: THFC
Register Description: Transmit HDLC FIFO Control Register
Register Address: 187h + (200h x (n - 1)) + (2000h x [(n - 1) / 8]): where n = 1 to 16
Bit
# 7 6 5 4 3 2 1 0
Name — — — — — — TFLWM1 TFLWM0
Default 0 0 0 0 0 0 0 0
Bits 1 and 0: Transmit HDLC FIFO Low Watermark Select (TFLWM[1:0])
TFLWM1 TFLWM0 Transmit FIFO Watermark
0 0 4 bytes
0 1 16 bytes
1 0 32 bytes
1 1 48 bytes
Register Name: TIBOC
Register Description: Transmit Interleave Bus Operation Control Register
Register Address: 188h + (200h x (n - 1)) + (2000h x [(n - 1) / 8]): where n = 1 to 16
Bit
# 7 6 5 4 3 2 1 0
Name — — — IBOSEL IBOEN — — —
Default 0 0 0 0 0 0 0 0
Bit 4: Interleave Bus Operation Select (IBOSEL). This bit selects channel or frame interleave mode.
0 = Channel Interleave.
1 = Frame Interleave.
Bit 3: Interleave Bus Operation Enable (IBOEN)
0 = Interleave Bus Operation disabled.
1 = Interleave Bus Operation enabled.
Register Name: TDS0SEL
Register Description: Transmit DS0 Channel Monitor Select Register
Register Address: 189h + (200h x (n - 1)) + (2000h x [(n - 1) / 8]): where n = 1 to 16
Bit
# 7 6 5 4 3 2 1 0
Name — — — TCM4 TCM3 TCM2 TCM1 TCM0
Default 0 0 0 0 0 0 0 0
Bits 4 to 0: Transmit Channel Monitor Bits (TCM[4:0]). TCM0 is the LSB of a 5-bit channel select that
determines which transmit channel data will appear in the
TDS0M register. Channels 1 through 32 are represented
by a 5-bit BCD code from 0 to 31. TCM[0:4] = all 0s selects channel 1, TCM[0:4] = 11111 selects channel 32.