STMicroelectronics SPEAr300, Reference Manual

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BS_Real time clock RM0082
354/844 Doc ID 018672 Rev 1
20.2.5 TIME register
The TIME is a RW register which defines the time (hour, minutes, seconds) when the RTC
can start to count the time. The TIME register bit assignments are given in
Table 304 .
Note: All values in this TIME register are in binary-coded decimal (BCD) format.
[04] LT RO
Write to TIME register lost.
If a second write to TIME register is requested before the
first is completed, this second request is aborted and the
LT bit is set. This bit is cleared when a write to TIME
register is performed successfully.
[03] PD RO
Pending write to DATE register.
If set, this bit indicates that a write to DATE register
request is asserted from 48 MHz part to 32 kHz part. It is
independent from PT. A new write can be successfully
requested only when this bit is cleared.
[02] PT RO
Pending write to TIME register.
If set, this bit indicates that a write to TIME register
request is asserted from 48 MHz part to 32 kHz part. A
new write can be successfully requested only when this
bit is cleared.
[01] Reserved - - Read: undefined. Write: should be zero.
[00] RC RO
Isolation of timer
If cleared (1‘b0), the RTC is self-isolated from the rest of
the chip. Reading and writing to TIME and DATE
registers can be safely done when this bit is set only.
Table 303. STATUS register bit assignments (continued)
Bit Name
Reset
value
Type Description
Table 304. TIME register bit assignments
Bit Name
Reset
value
Description
[31:22] Reserved - Read: undefined. Write: should be zero.
[21:20] HT Current hours tens.
[19:16] HU Current hours units.
[15] Reserved - Read: undefined. Write: should be zero.
[14:12] MT Current minutes tens.
[11:08] MU Current minutes units.
[07] Reserved - Read: undefined. Write: should be zero.
[06:04] ST Current seconds tens.
[03:00] SU Current seconds units.