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162 Rabbit 3000 Microprocessor
Figure 12-1 shows a block diagram of the serial ports.
Figure 12-1. Block Diagram of Rabbit Serial Ports
Serial Port F TXF Serial Transmit Out
RXF Serial Transmit In
TCLKF Optional external transmit clock
RCLKF Optional external receive clock
Table 12-1. Serial Port Signals (continued)
Serial Port Signal Name Function
Serial Port A
Timer A4
Serial Port B
Timer A5
TXA
RXA
TXB
RXB
CLKA
CLKB
Input to timers
perclk or
perclk/2 or
prescaled (Timer A1)
AT XA
ATXB
Serial Port C
Timer A6
TXC
RXC
CLKC
Serial Port D
Timer A7
TXD
RXD
CLKD
Serial Port E
Timer A2
TXE
RXE
RCLKE
TCLKE
Serial Port F
Timer A3
TXF
RXF
RCLKF
TCLKF
ARXB
ARXA