LC87F2W48A Datasheet, PDF (10/26 Pages) Sanyo Semicon Device – 50K-byte FROM and 1536-byte RAM integrated 8-bit 1-chip Microcontroller

LC87F2W48A
On-chip Debugger Pin Connection Requirements
For the treatment of the on-chip debugger pins, refer to the separately available documents entitled “RD87 On-chip
Debugger Installation Manual”
Recommended Unused Pin Connections
Port Name
Board
Recommended Unused Pin Connections
Software
P00 to P07
Open
Output low
P10 to P17
Open
Output low
P20 to P27
Open
Output low
P31 to P36
Open
Output low
P70 to P73
Open
Output low
PWM0, PWM1
Open
Output low
XT1
Pulled low with a 100kΩ resistor or less
General-purpose input port
XT2
Open
Output low
CF1
Pulled low with a 100kΩ resistor or less
General-purpose input port
CF2
Open
Output low
Port Output Types
The table below lists the types of port outputs and the presence/absence of a pull-up resistor.
Data can be read into any input port even if it is in the output mode.
Port Name
Option Selected
in Units of
Option Type
Output Type
Pull-up Resistor
P00 to P07
1
CMOS
1 bit
2
Nch-open drain
Programmable (Note 1)
Programmable (Note 1)
P10 to P17
1
CMOS
1 bit
2
Nch-open drain
Programmable
Programmable
P20 to P27
1
CMOS
1 bit
2
Nch-open drain
Programmable
Programmable
P31 to P36
1
CMOS
1 bit
2
Nch-open drain
Programmable
Programmable
P70
-
No
Nch-open drain
Programmable
P71 to P73
-
No
CMOS
Programmable
PWM0, PWM1
-
No
CMOS
No
Input for 32.768kHz crystal oscillator
XT1
-
No
No
(Input only)
Output for 32.768kHz crystal oscillator
XT2
-
No
(Nch-open drain when in general-purpose
No
output mode)
Input for ceramic resonator oscillator
CF1
-
No
No
(Input only)
Output for ceramic resonator oscillator
CF2
-
No
(Nch-open drain when in general-purpose
No
output mode)
Note 1: The control of the presence or absence of the programmable pull-up resistors for port 0 and the switching
between low- and high-impedance pull-up connection is exercised in 1-bit units.
No.A1869-10/26