Jameco Electronics Rabbit 3000 - Manual (Page 171)

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)
ATXA
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