
HARDWARE
1-90
3886 Group User’s Manual
NOTES ON USAGE
Handling of Power Source Pins
In order to avoid a latch-up occurrence, connect a capacitor suit-
able for high frequencies as bypass capacitor between power
source pin (VCC pin) and GND pin (VSS pin), between power
source pin (VCC pin) and analog power source input pin (AVSS
pin). Connect the same kind of capacitor between program power
source pin (CNVss/VPP) and GND pin when executing on-board
reprogramming of flash memory version. Make sure the connec-
tion between each pin is as short as possible. We recommend
using a ceramic capacitor of 0.01
F to 0.1 F.
EPROM version/One Time PROM version/
Flash memory version
The CNVSS pin is connected to the internal memory circuit block
by a low-ohmic resistance, since it has the multiplexed function to
be a programmable power source pin (VPP pin) as well.
To improve the noise reduction, connect a track between CNVSS
pin and VSS pin or VCC pin with 1 to 10 k
resistance.
The mask ROM version track of CNVSS pin has no operational in-
terference even if it is connected to Vss pin or Vcc pin via a
resistor.
Erasing of Flash memory version
For the parallel I/O mode and the serial I/O mode, set addresses
0100016 to 0FFFF16 as the memory area to be erased. If an incor-
rect address is set as the memory area to be erased, the product
may be permanently damaged.
DATA REQUIRED FOR MASK ORDERS
The following are necessary when ordering a mask ROM produc-
tion:
1.Mask ROM Confirmation Form1
2.Mark Specification Form2
3.Data to be written to ROM, in EPROM form (three identical cop-
ies)
DATA REQUIRED FOR One Time PROM
PROGRAMMING ORDERS
The following are necessary when ordering a PROM programming
service:
1.ROM Programming Confirmation Form1
2.Mark Specification Form2
3.Data to be programmed to PROM, in EPROM form (three identi-
cal copies)
For the mask ROM confirmation, the ROM programming confirma-
tion, and the mark specifications, refer to the “Mitsubishi MCU
Technical Information” Homepage.
1 Mask ROM Confirmation Forms
2 Mark Specification Forms
NOTES ON USAGE/DATA REQUIRED FOR MASK ORDERS AND ONE TIME PROM PROGRAMMING ORDERS