HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 172

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

6.9
Precautions concerning the use of on-board programming modes and PROM mode are
summarized below.
1. Program with the specified voltages and timing.
2. Before programming, check that the chip is correctly mounted in the PROM programmer.
3. Do not touch the socket adapter or chip while programming. Touching either of these can
4. Set H'FF as the PROM programmer buffer data for the following addresses:
5. Precautions in applying, releasing, and cutting*
The rated programming voltage (V
If the PROM programmer is set to Hitachi HN28F101 specifications, V
Applied voltages in excess of the rating can permanently damage the device. In particular,
insure that the peak overshoot of the PROM programmer does not exceed the maximum rating
of 13 V.
Overcurrent damage to the device can result if the index marks on the PROM programmer
socket, socket adapter, and chip are not correctly aligned.
cause contact faults and write errors.
H8/3644F: H'8000 to H'1FFFF
H8/3643F: H'6000 to H'1FFFF
H8/3642AF: H'4000 to H'1FFFF
The size of the PROM area is 32 kbytes in the H8/3644F, 24 kbytes in the H8/3643F, and 16
kbytes in the H8/3642AF. The addresses shown above always read H'FF, so if H'FF is not
specified as programmer data, a block error will occur.
a. Apply the programming voltage (V
cutting V
To avoid programming or erasing flash memory by mistake, V
released, and cut when the MCU is in a “stable operating condition” as described below.
Flash Memory Programming and Erasing Precautions
MCU stable operating condition
— The V
If the V
range (V
programmed or erased by mistake. This can occur even if V
power supply measures should be taken, such as the insertion of a bypass capacitor,
to prevent fluctuation of the V
CC
.
CC
PP
CC
voltage must be within the rated voltage range (V
voltage is applied, released, or cut while V
= 2.7 V to 5.5 V), since the MCU is unstable, the flash memory may be
PP
) of the flash memory is 12.0 V.
PP
) after V
CC
power supply when V
1
the programming voltage (V
CC
has stabilized, and release V
CC
PP
is not within its rated voltage
PP
is applied.
should only be applied,
CC
CC
PP
= 2.7 V to 5.5 V).
= 0 V. Adequate
will be 12.0 V.
PP
)
PP
before
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