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Chapter 16
Port Functions
Preliminary User’s Manual U15839EE1V0UM00
16.3.6 Port
6
Port 6 is an 8-bit input/output port in which input or output can be specified in 1-bit units. Each port bit
can be independently configured to port input, port output or peripheral function
Note 1
.
This register can be read or written in 1-bit and 8-bit units.
Figure 16-22:
Port 6 (P6)
Remark:
In Input Mode: When the P6 register is read, the pin levels at that time are read. Writing to
the P6 register writes the values to that register. This does not affect the
input pins.
In Output Mode:When the P6 register is read, the values of P6 are read. Writing to the P6
register writes the values to that register and those values are immediately
output.
Besides functioning as a port, in control mode, it also can operate as the serial interface (CSI2) or as
external interrupt request input.
Notes: 1. If using peripheral functions, the direction setting for the respective port bit is not forced
automatically. Port bit direction has to be programmed according to the peripheral function
requirement by setting the port mode register.
2. The reset value of register P6 is 00H. Due to the input mode of the port after reset, the read
input value is determined by the port pins.
(1)
Operation in control mode
7
6
5
4
3
2
1
0
Address
At Reset
P6
P67
P66
P65
P64
P63
P62
P61
P60
FFFFF40AH 00H
Note 2
Bit Position
Bit Name
Function
7 to 0
P6n
(n = 7 to 0)
Input/output port
Port
Alternate Pin Name
Remarks
Block Type
Port 6
P60
NMI
Serial interface (CSI2) input/output or external
interrupt request input.
A
P61
INTP0
P62
INTP1
P63
INTP2
P64
INTP3
P65
SI2
P66
SO2
P67
SCK2
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