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SCC1
Rx
SCC1
Tx
SCC2
Rx
SCC2
Tx
SCC3
Rx
SCC3
Tx
SCC4
Rx
SCC4
Tx
SMC1
SMC2
Figure 21-28. Bank-of-Clocks Selection Logic for NMSI
The SCC1 in NMSI mode has its own set of modem control signals:
¥ TXD1
¥ RXD1
¥ TCLK1 ¬ BRG1ÐBRG4, CLK1ÐCLK4
¥ RCLK1 ¬ BRG1ÐBRG4, CLK1ÐCLK4
¥ RTS1
¥ CTS1
¥ CD1
The SCC2 in NMSI mode has its own set of modem control signals:
¥ TXD2
¥ RXD2
¥ TCLK2 ¬ BRG1ÐBRG4, CLK1ÐCLK4
¥ RCLK2 ¬ BRG1ÐBRG4, CLK1ÐCLK4
¥ RTS2
¥ CTS2
¥ CD2
MOTOROLA
Part V. The Communications Processor Module
BRG1
BRG2
RCLK1
TCLK1
RCLK2
TCLK2
Bank of Clocks
RCLK3
Selection Logic
TCLK3
RCLK4
TCLK4
SMCLK1
SCC clock source selected in SICR
SMCLK2
SMC clock source selected in SIMODE
Chapter 21. Serial Interface
BRG3
BRG4
BRGO1
BRGO2
BRGO3
BRGO4
CLK1
CLK2
CLK3
CLK4
CLK5
CLK6
CLK7
CLK8
21-37
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