Rainbow Electronics AT73C246 - Manual (Page 131)

131
11050A–PMAAC–07-Apr-10
AT73C246
Name: BACKUP_CTRL
Access: Read / Write
Address: 0x56
Name: VERSION
Access: Read
Address: 0x7F
7 6 5 4 3 2 1 0
- - - - OSC_UPDT OSC_EN OSC_STAT RST_BKUP
Table 13-90. BACKUP_CTRL (0x56) Structure
Bit Name Description Reset value
7:4 - unused 0000
3 OSC_UPDT
RTC Oscillator update
0: No action.
1: Update RTC oscillator with OSC_EN
0
2 OSC_EN
RTC Oscillator enable request
0: Oscillator off.
1: Oscillator on.
0
1 OSC_STAT
RTC Oscillator status (read only)
0: Oscillator off.
1: Oscillator on.
0
0 RST_BKUP
Reset of the Backup Area
0: Backup area active
1: Backup area in reset state
0
7 6 5 4 3 2 1 0
SOFTWARE_TAG VERSION
Table 13-91. VERSION (0x7F) Structure
Bit Name Description Reset value
7:4 SOFTWARE_TAG
Software Tag to identify product specificities as
described in Section
17. “Ordering Information”
on page 154 .
XXXX
3:0 VERSION
‘0001’: Rev. C samples
‘0010’: Rev. D samples
XXXX