Renesas H8S Series Hardware Manual page 687

one programming operation on a 128-byte programming unit block. Programming should be carried out with the entire
programming unit block erased.
Before programming, check that the chip is correctly mounted in the PROM programmer: Overcurrent damage to
the device can result if the index marks on the PROM programmer socket, socket adapter, and chip are not correctly
aligned.
Do not touch the socket adapter or chip during programming: Touching either of these can cause contact faults and
write errors.
Rev.6.00 Oct.28.2004 page 659 of 1016
REJ09B0138-0600H