MC68000 MOTOROLA [Motorola, Inc], MC68000 Datasheet - Page 282

• Manufacturer Part Number: MC68000
• Manufacturer: MOTOROLA [Motorola, Inc]

Signal Description
triggers. TCLK2 acts as the SCC2 baud rate generator output if SCC2 is in one of the mul-
tiplexed modes.
5.15 NMSI3 PORT OR PORT A PINS OR SCP PINS
The NMSI3 port or port A pins or SCP pins are shown in Figure 5-12.
These eight pins can be used either as the NMSI3 port or as the NMSI3 port (less three mo-
dem lines) and the SCP port. If the SCP is enabled (EN bit in SPMODE register is set), then
the three lines are connected to the SCP port. Otherwise, they are connected to the SCC3
port.
Each of the port A I/O pins can be configured individually to be general-purpose I/O pins or
a dedicated function in NMSI3. When they are used as the NMSI3 pins, they function exactly
5-18
• RXD2/PA0
• TXD2/PA1
• RCLK2/PA2
• TCLK2/PA3
• CTS2/PA4
• RTS2/PA5
• CD2/PA6
• SDS2/PA7/BRG2
Figure 5-12. NMSI3 Port or Port A Pins or SCP Pins
NOTE: In NMSI mode, the baud rate generator outputs can also
Source
SCC1
SCC2
SCC3
Table 5-9. Baud Rate Generator Outputs
appear on the RCLK and TCLK pins as programmed in the
SCON register.
MC68302 USER’S MANUAL
BRG1
BRG2
BRG3
NMSI
MC68302
TCLK2
TCLK3
BRG1
GCI
RXD3 / PA8
TXD3 / PA9
RCLK3 / PA10
TCLK3 / PA11
CTS3 / SPRXD
RTS3 / SPTXD
CD3 / SPCLK
BRG3 / PA12
TCLK2
TCLK3
BRG1
IDL
TCLK2
TCLK3
BRG1
PCM
MOTOROLA