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CHAPTER 4 PORT FUNCTIONS
Preliminary User’s Manual U14581EJ3V0UM00
4.2.7 Port 6
Port 6 is a 2-bit input/output port with output latch. P60 and P61 pins can specify the input mode/output mode
in 1-bit units with the port mode register 6 (PM6).
Alternate functions include clock output and sound generator output.
RESET input sets port 6 to input mode.
Figure 4-8 shows a block diagram of port 6.
Figure 4-8. P60 and P61 Block Diagram
PM: Port mode register
RD: Port 6 read signal
WR: Port 6 write signal
RD
P60/PCL/TPO
P61/SGO
WR
PORT
WR
PM
Output latch
(P60, P61)
PM60, PM61
Alternate
functions
Selector
Internal bus
Содержание mPD780852 Series
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