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(2) Control mode
P30 to P37 function as timer I/O, clock output, and buzzer output pins.
(a) TI1 and TI2
Pins for external count clock input to the 8-bit timer/event counter.
(b) TO0 to TO2
Timer output pins
(c) PCL
Clock output pin
(d) BUZ
Buzzer output pin
2.2.5 P70 to P74 (Port 7)
These pins constitute a 5-bit I/O port. They can be specified in input or output mode in 1-bit units using port
mode register 7 (PM7).
Port 7 can drive LEDs directly.
P70 to P74 are N-ch open-drain outputs. In mask ROM versions, use of pull-up resistors can be specified with
the mask option.
2.2.6 P80 to P87 (Port 8)
These pins constitute an 8-bit output-only port. Besides serving as output port pins, they function as display outputs
for the VFD controller/driver.
Port 8 can drive LEDs directly.
The following operating modes can be specified in 1-bit units.
(1) Port mode
P80 to P87 function as an 8-bit output-only port.
P80 to P87 are P-ch open-drain outputs. In mask ROM versions, use of pull-down resistors can be specified
with the mask option.
(2) Control mode
P80 to P87 function as the display output pins of the VFD controller/driver (FIP13 to FIP20).
2.2.7 P90 to P97 (Port 9)
These pins constitute an 8-bit output-only port. Besides serving as output port pins, they function as display outputs
for the VFD controller/driver.
Port 9 can drive LEDs directly.
The following operating modes can be specified in 1-bit units.
(1) Port mode
P90 to P97 function as an 8-bit output-only port.
P90 to P97 are P-ch open-drain outputs. In mask ROM versions, use of pull-down resistors can be specified
with the mask option.
(2) Control mode
P90 to P97 function as the display output pins of the VFD controller/driver (FIP21 to FIP28).
40
CHAPTER 2 PIN FUNCTIONS
User's Manual U11302EJ4V0UM
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