Renesas 7200 Series User Manual page 48

(2) Port P1
Port P1 is an 8-bit I/O port. The output structure is CMOS output, however, only when ports P1
P1 are used as multi-master I
4
Port P1 has basically the same function as port P0.
Port P1 is also used as CRT output pin OUT2. Pin OUT2 is a CRT output pin. When setting "1" to
0
bit 7 of the CRT control register, the pin functions as CRT output pin, when setting "0," the pin
functions as a general-purpose I/O port.
Ports P1 –P1 are used as SCL1, SCL2, SDA1 and SDA2 respectively.
1 4
Port P1 is also used as external interrupt input pin INT3 and analog input pin A-D1.
5
Ports P1 and P1
6
(3) Port P2
Port P2 is an 8-bit I/O port. The output structure is CMOS output, however, only when ports P2
P2 are used as serial I/O pins, the output structure is N-channel open-drain output. Port P2 has
1
basically the same function as port P0.
Port P2 is also used as serial I/O synchronous clock input/output pin S
0
serial I/O data output pin S
Port P2 is also used as external clock input pin TIM3. When the timer 3 count source is supplied
3
form an external device (as set by the timer 34 mode register), the input signal to this pin is the timer
3 count source.
The port P2 is also used as external clock input pin TIM2. When the count source for timer 2 is
4
supplied form an external device (as set by the timer 12 mode register), the input signal to this pin
is the timer 2 count source.
Ports P2 –P2 has only I/O port function.
5 7
(4) Port P3
Ports P3 –P3 are 3-bit I/O ports, ports P3
0 2
of ports P3 and P3
0
by bit 0 or 1 of the port P3 output mode control register (address 00CD
drain output structure is selected; when "0," CMOS output structure is selected.
Port P3 has only I/O port function. The output structure is N-channel open-drain output. Port P3
2
basically the same function as port P0.
Ports P3 and P3
0
Ports P3 and P3
3
OSC1 is a clock input for CRT display, pin OSC2 is a clock output for CRT display. The output
structure of pin OSC2 is CMOS output.
(5) Port P5
Ports P5 –P5 are 4-bit output ports. The output structure is CMOS output. Ports P5
2 5
used as CRT output pins R, G, B, OUT1 respectively.
Pins R, G, B, and OUT1 are CRT output pins. When setting each bit of the port P5 direction register
to "0," the pins function as CRT output pins; when setting to "1," the pins function as general-purpose
output ports. The output structure of CRT output pin is CMOS output structure.
2 C-BUS interface, the output structure is N-channel open-drain output.
are also used as analog input pins A-D2 and A-D3 respectively.
7
. Port P2
OUT
, either CMOS output or N-channel open-drain output structure can be selected
1
are also used as analog input pins A-D5 and A-D6 respectively.
1
are also used as CRT display clock input pins OSC1 and OSC2 respectively. Pin
4
7220 Group User's Manual
FUNCTIONAL DESCRIPTION
is also used as serial I/O data input pin S
2
and P3 are a 2-bit input port. For the output structure
3 4
2.4 Input/Output pins
. Port P2 is also used as
CLK 1
.
IN
). When "1," N-channel open-
16
–P5
2 5
–
1
and
0
has
2
are also
2-21