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MN102HF75K Flash EEPROM Version
Using the Onboard Serial Programming Mode
MN102H75K/F75K/85K/F85K LSI User Manual
B.4.2 Circuit Requirements for the Target Board
V
= +5 V
PP
V
(for level detection)
DD
RST
Serial
SBT
writer
SBD
GND
Figure B-6 Target Board–Serial Writer Connection
Table B-3 Pin Descriptions for Target Board–Serial Writer Connection
Pin Name
V
5-V power supply
PP
V
3.0–3.3 external power supply
DD
V
(for level detection)
V
DD
DD
RST
Reset
SBT
Serial interface clock supply
SBD
Serial interface data supply
GND
Ground
Note:
1. During normal microcontroller operation, V
V
(3.3 ±0.3 V). Apply 5 V to the V
DD
the flash memory.
During programming, the serial writer supplies V
Install a switch on the target board to toggle between V
serial writer and V
PP
In serial programing a large-scale of current flows through Vpp. See to it that
5V is supplied to Vpp by checking the connection and reducing the
impedance of switches.
You must supply a V
DD
V
(for level detection) informs the serial writer of the actual V
DD
the target board. If the V
error message.
Connect pullup resistors on the target board to the RST, SBT, and SBD pins.
Use a pullup resistor value of 10 k ±10%. Install a switch on the target
board to toggle between RST for serial programming and RST for normal
operation. Alternatively, install a wired-OR connection. For a wired-OR
connection, disable RST for normal operation during serial programming.
RST, SBT, and SBD are output from the serial writer through an open con-
nection.
321
Panasonic
Target board
10 k
RST
SBT1
SBD1
Description
level detection pin for target board
supply only when programming
PP
for normal operation.
source of 3.0 V – 3.3 V externally.
level is too low, the serial writer generates an
DD
Panasonic Semiconductor Development Company
V
DD
V
PP
MCU
External
power source
3.0 V - 3.3 V
GND
should always be equal to
PP
to the microcontroller.
PP
supplied by the
PP
level of
DD
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