CHAPTER 2 PIN FUNCTIONS
41
User’s Manual U11302EJ4V0UM
2.2.8 P100 to P107 (Port 10)
These pins constitute an 8-bit I/O port. Besides serving as I/O port pins, they function as display outputs for the
VFD controller/driver.
Port 10 can drive LEDs directly.
The following operating modes can be specified in 1-bit units.
(1) Port mode
P100 to P107 function as an 8-bit I/O port. They can be specified in input or output mode in 1-bit units using
port mode register 10 (PM10).
P100 to P107 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
P100 to P107 function as display output pins for the VFD controller/driver (FIP29 to FIP36).
2.2.9 P110 to P117 (Port 11)
These pins constitute an 8-bit I/O port. Besides serving as I/O port pins, they function as display outputs for the
VFD controller/driver.
Port 11 can drive LEDs directly.
The following operating modes can be specified in 1-bit units.
(1) Port mode
P110 to P117 function as an 8-bit I/O port. They can be specified in input or output mode in 1-bit units using
port mode register 11 (PM11).
P110 to P117 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
P110 to P117 function as display output pins for the VFD controller/driver (FIP37 to FIP44).
2.2.10 P120 to P127 (Port 12)
These pins constitute an 8-bit I/O port. Besides serving as I/O port pins, they function as display outputs for the
VFD controller/driver.
Port 12 can drive LEDs directly.
The following operating modes can be specified in 1-bit units.
(1) Port mode
P120 to P127 function as an 8-bit I/O port. They can be specified in input or output mode in 1-bit units using
port mode register 12 (PM12).
P120 to P127 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
P120 to P127 function as display output pins for the VFD controller/driver (FIP45 to FIP52).
2.2.11 FIP0 to FIP12
These are display output pins for the VFD controller/driver.
FIP0 to FIP12 are P-ch open-drain outputs. In mask ROM versions, use of pull-down resistors can be specified
with the mask option. The
µ
PD78P0208 contains pull-down resistors at FIP0 to FIP12 (connected to V
LOAD
).
Содержание mPD780208 Subseries
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