User manual
...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 574
www.energymicro.com
Bit Name Reset Access Description
Clear RAMWERR and BUMODETS in BURTC_STATUS.
22.5.9 BURTC_POWERDOWN - Retention RAM power-down resgister
Offset Bit Position
0x020
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset
0
Access
RW
Name
RAM
Bit Name Reset Access Description
31:1 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
0 RAM 0 RW Retention RAM power-down
Shut off power to the Retention RAM. Once it is powered down, it cannot be powered up again
22.5.10 BURTC_LOCK - Configuration Lock Register
Offset Bit Position
0x024
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reset
0x0000
Access
RW
Name
LOCKKEY
Bit Name Reset Access Description
31:16 Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
15:0 LOCKKEY 0x0000 RW Configuration Lock Key
Write any other value than the unlock code to lock BURTC_POWERDOWN, BURTC_CTRL, BURTC_LFXOFDET, and BURTC_IEN
registers from editing. Write the unlock code to unlock. When reading the register, bit 0 is set when the lock is enabled.
Mode Value Description
Read Operation
UNLOCKED 0 BURTC_POWERDOWN, BURTC_CTRL,
BURTC_LFXOFDET, and BURTC_IEN registers are unlocked
LOCKED 1 BURTC_POWERDOWN, BURTC_CTRL,
BURTC_LFXOFDET, and BURTC_IEN registers are locked
Write Operation
LOCK 0 Lock BURTC_POWERDOWN, BURTC_CTRL,
BURTC_LFXOFDET, and BURTC_IEN registers
UNLOCK 0xADE8 Unlock BURTC registers