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Serial Interface with Time Slot Assigner
MOTOROLA
MC68360 USER’S MANUAL
7-79
SMC2CS—SMC2 Clock Source (NMSI mode)
SMC2 can take its clocks from one of the baud rate generators or one of four pins from
the bank of clocks. The SMC2 transmit and receive clocks must be the same when it is
connected to the NMSI.
000 = SMC2 transmit and receive clocks are BRG1.
001 = SMC2 transmit and receive clocks are BRG2.
010 = SMC2 transmit and receive clocks are BRG3.
011 = SMC2 transmit and receive clocks are BRG4.
100 = SMC2 transmit and receive clocks are CLK5.
101 = SMC2 transmit and receive clocks are CLK6.
110 = SMC2 transmit and receive clocks are CLK7.
111 = SMC2 transmit and receive clocks are CLK8.
SMC1CS—SMC1 Clock Source (NMSI mode)
SMC1 can take its clocks from one of the baud rate generators or one of four pins from
the bank of clocks. The SMC1 transmit and receive clocks must be the same when it is
connected to the NMSI.
000 = SMC1 transmit and receive clocks are BRG1.
001 = SMC1 transmit and receive clocks are BRG2.
010 = SMC1 transmit and receive clocks are BRG3.
011 = SMC1 transmit and receive clocks are BRG4.
100 = SMC1 transmit and receive clocks are CLK1.
101 = SMC1 transmit and receive clocks are CLK2.
110 = SMC1 transmit and receive clocks are CLK3.
111 = SMC1 transmit and receive clocks are CLK4.
SDMx—SI Diagnostic Mode for TDM A or B
00 = Normal operation.
01 = Automatic Echo. In this mode, the channel_x transmitter automatically retransmits
the TDM received data on a bit-by-bit basis. The receive section operates normal-
ly, but the transmit section can only retransmit received data. In this mode, the
L1GRx line is ignored.
10 = Internal Loopback. In this mode, the TDM transmitter output is internally connect-
ed to the TDM receiver input (L1TXDx is connected to L1RXDx). The receiver and
transmitter operate normally. The data appears on the L1TXDx pin. In this mode,
the L1RQx line is asserted normally. The L1GRx line is ignored.
11 = Loopback Control. In this mode, the TDM transmitter output is internally connect-
ed to the TDM receiver input (L1TXDx is connected to L1RXDx). The transmitter
output (L1TXDx) and the L1RQx pin will be inactive. This mode is used to accom-
plish loopback testing of the entire TDM without affecting the external serial lines.
NOTE
In modes 01,10, and 11, the receive and the transmit clocks
should be identical.