Rainbow Electronics DS3170 - Manual (Page 193)

DS3170 DS3/E3 Single-Chip Transceiver
193 of 233
Register Name: E3G832.TMABR
Register Description: E3 G.832 Transmit MA Byte Register
Register Address: 11Ch
Bit
# 15 14 13 12 11 10 9 8
Name -- -- -- -- -- -- -- --
Default 0 0 0 0 0 0 0 0
Bit
# 7 6 5 4 3 2 1 0
Name TPT2 TPT1 TPT0 TTIGD TTI3 TTI2 TTI1 TTI0
Default 0 0 0 0 0 0 0 0
Bits 7 to 5: Transmit Payload Type (TPT[2:0]) – These bits determines the value transmitted in the payload type
(third, fourth, and fifth bits in the MA byte).
Bit 4: Transmit Timing Source Indicator Bit Generation Disable (TTIGD) – When 0, the last three bits of the MA
byte (MA[6:8]) are generated from the four timing source indicator bits TTI[3:0]. When 1, TTI[3] is ignored and
TTI[2:0] are directly inserted into the last three bits of the MA byte.
Bits 3 to 0: Transmit Timing Source Indication (TTI[3:0]) – These four bits make up the timing source indicator
bits.
Register Name:
E3G832.TNGBR
Register Description: E3 G.832 Transmit NR and GC Byte Register
Register Address: 11Eh
Bit
# 15 14 13 12 11 10 9 8
Name TGC7 TGC6 TGC5 TGC4 TGC3 TGC2 TGC1 TGC0
Default
0 0 0 0 0 0 0 0
Bit
# 7 6 5 4 3 2 1 0
Name TNR7 TNR6 TNR5 TNR4 TNR3 TNR2 TNR1 TNR0
Default
0 0 0 0 0 0 0 0
Bits 15 to 8: Transmit GC Byte (TGC[7:0]) – These eight bits are the GC byte to be inserted into the E3 frame.
Bits 7 to 0: Transmit NR Byte (TNR[7:0]) – These eight bits are the NR byte to be inserted into the E3 frame.