UPD78F0411GA-GAM-AX Datasheet, PDF (508/564 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 23 OPTION BYTE
Address: 0081H/1081H^{Notes 1, 2}
7
6
0
0
Figure 23-1. Format of Option Byte (2/2)
5
4
3
2
0
0
0
0
1
0
0
POCMODE
POCMODE
0
1.59 V POC mode (default)
1
2.7 V/1.59 V POC mode
POC mode selection
Notes 1.
2.
POCMODE can only be written by using a dedicated flash memory programmer. It cannot be set
during self-programming or boot swap operation during self-programming (at this time, 1.59 V POC
mode (default) is set). However, because the value of 1081H is copied to 0081H during the boot swap
operation, it is recommended to set a value that is the same as that of 0081H to 1081H when the boot
swap function is used.
To change the setting for the POC mode, set the value to 0081H again after batch erasure (chip
erasure) of the flash memory. The setting cannot be changed after the memory of the specified block
is erased.
Caution Be sure to clear bits 7 to 1 to “0”.
Address: 0082H/1082H, 0083H/1083H^Note
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
Note Be sure to set 00H to 0082H and 0083H, as these addresses are reserved areas. Also set 00H to 1082H
and 1083H because 0082H and 0083H are switched with 1082H and 1083H when the boot swap operation
is used.
Address: 0084H/1084H^Note
7
6
5
4
3
2
1
0
0
0
0
0
0
0
OCDEN1 OCDEN0
OCDEN1
0
0
1
1
OCDEN0
0
1
0
1
On-chip debug operation control
Operation disabled
Setting prohibited
Operation enabled. Does not erase data of the flash memory in case authentication
of the on-chip debug security ID fails.
Operation enabled. Erases data of the flash memory in case authentication of the
on-chip debug security ID fails.
Note To use the on-chip debug function, set 02H or 03H to 0084H. Set a value that is the same as that of 0084H
to 1084H because 0084H and 1084H are switched during the boot swap operation.
Remark For the on-chip debug security ID, see CHAPTER 25 ON-CHIP DEBUG FUNCTION.
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User’s Manual U18698EJ1V0UD