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| HD6432345 Datasheet, PDF (561/907 Pages) Hitachi Semiconductor – H8S/2345 F-ZTAT Hardware Manual | |||
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Address
Data
VPP
VPP
VCC
VCC
VCC+1
VCC
CE
PGM
OE
Program
tAS
Input data
tDS
tDH
tVPS
tVCS
tCES
tPW
tOPW*
tOES
Verify
tAH
Output data
tDF
tOE
Note: * tOPW is defined by the value shown in the flowchart.
Figure 17.5 PROM Programming/Verification Timing
17.5.3 Programming Precautions
⢠Program using the specified voltages and timing.
The programming voltage (VPP) in PROM mode is 12.5 V.
If the PROM programmer is set to Hitachi HN27C101 specifications, VPP will be 12.5 V.
Applied voltages in excess of the specified values can permanently destroy the MCU. Be
particularly careful about the PROM programmerâs overshoot characteristics.
⢠Before programming, check that the MCU is correctly mounted in the PROM programmer.
Overcurrent damage to the MCU can result if the index marks on the PROM programmer,
socket adapter, and MCU are not correctly aligned.
⢠Do not touch the socket adapter or MCU while programming. Touching either of these can
cause contact faults and programming errors.
⢠The MCU cannot be programmed in page programming mode. Select the programming mode
carefully.
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