LC87F40C8A Datasheet, PDF (11/26 Pages) Sanyo Semicon Device – Internal 128K-byte FROM (ROM/CGROM), 2048 byte RAM, 1024-byte CGRAM, and 704×10-bit CRT Display RAM 8-bit 1-chip Microcontroller

LC87F40C8A
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
P00 to P07
Option Selected
in Units of
1 bit
Option Type
1
CMOS
Output Type
Pull-up Resistor
Programmable (Note 1)
2
Nch-open drain
No
P10 to P17
P20 to P27
P30 to P37
P70
1 bit
1
CMOS
2
Nch-open drain
-
No
Nch-open drain
Programmable
Programmable
Programmable
P71 to P73
-
No
CMOS
Programmable
P80 to P87
-
No
Nch-open drain
No
PC0 to PC4
1 bit
1
CMOS
Programmable
2
Nch-open drain
Programmable
Note 1: Programmable pull-up resistors for port 0 are controlled in 4 bit units (P00 to 03, P04 to 07).
*1 Connect the IC as shown below to minimize the noise input to the VDD1 pin.
Be sure to electrically short the VSS1 and VSS2 pins.
Power
supply
LSI
VDD1
VDD2
VSS1 VSS2
On-board writing system
The LC87F40C8A has the On-board writing system. The program is renewable by using SANYO Flash On-board
System after the LSI has been installed on the application board.
This system has to connect the 6 pins (VDD, VSS, RES, communication pins) with the interface board of SANYO
Flash On-board System.
It is necessary that the pins to be used for the rewriting system should be able to be separated from the application board
properly.
• The loader program must be written into the ROM to use On-board writing system. The loader program should
be written into the ROM before the LSI has been installed on the board by the general purpose PROM programs.
When the option setting selects the this system to use, the loader program automatically links on the user program
linking.
Please ask to our sales persons before using On-board writing system.
No.A0139-11/26