The LC86E7148 is a CMOS 8-bit single chip microcontroller with UVEPROM for the LC867100 series. This
microcontroller has the function and the pin description of the LC867100 series mask ROM version, and 48K-byte EPROM.
The program data is rewritable. It is suitable to develop the program.
Features
(1) Option switching by EPROM data
The option function of the LC867100 series can be specified by the EPROM data.
LC86E7148 can be checked the functions of the trial pieces using the mass production board.
(2) Internal EPROM capacity : 49152 bytes
(3) Internal RAM capacity : 1152 bytes
Used EPROM or RAM capacity are equal ROM or RAM capacity of mask ROM version which applies LC86E7148.
(4) Operating supply voltage : 4.5V to 6.0V
(5) Instruction cycle time : 1µs to 366µs
(6) Operating temperature : +10°C to +40°C
(7) The pin compatible with the LC867100 series mask ROM devices
(8) Applicable mask ROM version : LC867148/LC867140/LC867132/LC8671 28/LC867124/LC867120
/LC867116/LC867112/LC867108
(9) Factory shipment : QIC80S
Ver.1.01A
D1694
91400 RM (IM) HK No.6748-1/20
LC86E7148
Notice for use
At using, take notice of the followings.
(1) A point of difference LC86E7148 and LC867100 series
Item LC86E7148 LC867148/40/32/28/24/20/16/12/08
Port form at reset Please refer ‘Port form at reset’ on next page.
Operation after reset
releasing
Operating supply
voltage range (VDD)
Total output current
[∑IOAL(2)]
[∑IOAL(3)]
Power dessipation
LC86E7148 uses 256 bytes that is addressed on 0FF00H to FFFFH in the program memory as the option configuration data
area. This option configuration can execute all options which LC867100 series have. Next tables show the options that
correspond and not correspond to LC86E7148.
• A kind of the option corresponding of the LC86E7148
A kind of option Pins, Circuits Contents of the option
Input/output form of
input/output ports
Pull-up MOS Tr. of
input port
*1) Specified in a bit.
*2) Specified in nibble unit. Pull-up MOS Tr. is not provided in N-channel open drain output port.
The port operation related the option is different at reset. Refer to the next table.
The option is specified until 3ms after
going to a ‘H’ level to the reset terminal
by degrees. The program is executed from
00H of the program counter.
4.5V to 6.0V 2.5V to 6.0V
Refer to ‘electrical characteristics’ on the semiconductor news.
Port 0
(specified in a bit)
Port 1
(specified in a bit)
*1
Port 7
(specified in a bit) *1
Each of P74 and P75 has no
option
1. Input : No Pull-up MOS Tr.
Output : N-channel open drain *1
2. Input : Pull-up MOS Tr.
Output : CMOS *2
1. Input : Programmable pull-up MOS Tr.
Output : N-channel open drain
2. Input : Programmable pull-up MOS Tr.
Output : CMOS
1. No Pull-up MOS Tr.
2. Pull-up MOS Tr.
The program is executed from 00H of the
program counter immediately after going
to a ‘H’ level to the reset terminal.
No.6748-2/20
LC86E7148
(2) Option
The option data is created by the option specified program “SU86K.EXE”. The created option data is linked to the
program area by linkage loader “L86K.EXE”.
(3) ROM space
LC86E7148 and LC867100 series use 256 bytes that is addressed on 0FF00H to 0FFFFH in the program memory as the
option specified data area. These program memory capacity are 49152 bytes that is addressed on 0000H to 0BFFFH.
The LC86E7148 must be programmed after specifying option data. The option is specified by “SU86K.EXE”. The
specified option file and the file created by our macro assembler “M86K.EXE” are linked by our linkage loader
“L86K.EXE” which creates .HE X file, then the option code is put i n the option specified area ( 0FF00H to 0FFFFH) of
its .HEX file.
(2) How to program for the EPROM
The LC86E7148 can be programmed by EPROM programmer with attachment ; W86EP7148Q
• “27512 (Vpp=12.5V) Intel high speed programming” mode available. T he address must be set to “0 to 0FFFFH” and a
jumper (DASEC) must be set to ‘OFF’ at programming.
(3) How to use the data security function
“Data security” is the disabled function to read the data of the EPROM.
The following is the process in order to execute the data security.
1. Set ‘ON’ the jumper of attachment.
2. Program again. Then EPROM programmer displays the error. The error means normally activity of the data
security. It is not a trouble of the EPROM programmer or the LSI.
Notes
• Data security is not executed when the data of all address have ‘FFH’ at the sequence 2 above.
• The programming by a sequential operation “BLANK=>PROGRAM=>VERIFY” cannot be executed data security at the
sequence 2 above.
• Set to ‘OFF’ the jumper after executing the d ata security.
(4) How to eliminate
The programming data can be erased by using the EPROM eraser.
(5) Shielding
The UVEPROM (ultraviolet erasable programmable ROM) is in it. Put the seal on the window in use.