Datasheet

Section 22 PROM
Rev. 6.00 Mar. 18, 2010 Page 763 of 982
REJ09B0054-0600
Program Verification
Input data Output data
t
AS
t
AH
t
DF
t
DH
t
DS
t
VPS
t
VCS
t
CES
t
PW
t
OPW
*
t
OES
t
OE
Address
Data
VPP
VCC
CE
PGM
OE
V
PP
V
CC
V
CC
+1
V
CC
Note: * t
OPW
is defined by the value shown in the flowchart.
Figure 22.5 PROM Programming/Verification Timing
22.3.2 Programming Precautions
• Program using the specified voltages and timing.
The programming voltage (V
PP
) in PROM mode is 12.5 V.
Applied voltages in excess of the specified values can permanently destroy the MCU. Be
particularly careful about the PROM programmer’s overshoot characteristics.
If the PROM programmer is set to Renesas Technology HN27C101 specifications, V
PP
will be
12.5 V.
• 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.