ISD91200 Series Technical Reference Manual
Release Date: Sep 16, 2019
- 360 -
Revision 2.4
6.7
User Configuration (CONFIG)
Config0 (ISP Address = 0x0030_0000)
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
CBODEN
Reserved
15
14
13
12
11
10
9
8
Reserved
7
6
5
4
3
2
1
0
CBS
Reserved
LOCK
DFEN
Table 6-2 User Configuration Register 0 (Config0, address 0x0030_0000 accessible through ISP only)
Config0
Address = 0x0030_0000
Bits
Description
[31:23]
Reserved
Reserved for future use
[23]
CBODEN
Brown Out Detector Enable
If set to ‘0’ the Brown Out Detector (BOD) will be enabled after power up. It will be
configured at lowest voltage (2.1V) and if brown out condition detected will trigger
the NMI interrupt to processor.
0= Enable
1=Disable brown out detect after power on
[22:8]
Reserved
Reserved for future use
[7]
CBS
Configuration Boot Selection
0 = Chip will boot from LDROM
1 = Chip will boot from APROM
[6:2]
Reserved
Reserved for future use
[1]
LOCK
Security Lock
0 = Flash data is locked
1 = Flash data is not locked.
When flash data is locked, only device ID, Config0 and Config1 can be read by ICP
through serial debug interface. Other data is locked as 0xFFFFFFFF. Once locked
no SWD debugging is possible. ISP can read data anywhere regardless of LOCK bit
value.
[0]
DFENB
Data Flash Enable Bar
When data flash is enabled, flash memory is partitioned between APROM and
DATAF memory depending on the setting of data flash base address in Config1
register. If set to ‘0’ then no DATAF partition exists.
0 = Enable data flash
1 = Disable data flash