CHAPTER 4 PORT FUNCTIONS
Preliminary User’s Manual U19014EJ1V0UD
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4.2.4 Port 6
Port 6 is a 2-bit I/O port with an output latch. Port 6 can be set to the input mode or output mode in 1-bit units
using port mode register 6 (PM6).
The output of the P60 and P61 pins is N-ch open-drain output (6 V withstanding voltage).
Reset signal generation sets port 6 to input mode.
Figure 4-12 shows a block diagram of port 6.
Figure 4-12. Block Diagram of P60 and P61
P60,
P61
WR
PORT
WR
PM
PM60, PM61
PM6
RD
P6
Output latch
(P60, P61)
Selector
Internal bus
P6:
Port register 6
PM6:
Port mode register 6
RD: Read
signal
WR
××
: Write
signal
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