Cmsemicon CMS32L051 - Real-Time Clock Selection Register (RTCCL)

V1.2.2
CMS32L051 User Manual |Chapter 8 15-Bit Interval Timer
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8.3.2 Real-time clock selection register (RTCCL)
The real-time clock and the count clock (f RTC) of the 15-bit interval timer can be selected via
RTCCL
.
Figure 8-3 Format of real-rime clock selection register (RTCCL)
Address: 0x4004047C After reset: 00H R/W
Symbol
7 6 5 4 3 2 1
0
RTCCL
RTCCL7
Clock source selection for real-time clocks, counting clocks for 15-bit interval timers
0
Select the high-speed System Clock (f
MX
).
1
Select the high-speed internal oscillator (f
hoco
).
RTCCKS1
RTCCKS0
RTCCL6
RTCCL5
Selection of operating clocks for real-time clocks, counting
clocks for 15-bit interval timer
0
0
x
x
Subsystem clock (f
SUB).
0
1
Low-speed internal oscillator clock (f
IL
) (WUTMMCK0 must be
set to 1).
1
0
0
1
Main clock f
max
/f
hoco
(selected via RTCCL7)/1952
1
0
0
0
Main clock f
max
/f
hoco
(selected via RTCCL7)/1464
1
0
1
0
Main clock f
max
/f
hoco
(selected via RTCCL7)/976
1
1
0
0
Main clock f
max
/f
hoco
(selected via RTCCL7)/488
1
1
1
0
Main clock f
max
/f
hoco
(selected via RTCCL7)/244
RTCCL7
RTCCL6
RTCCL5
0
0
0
RTCCKS1
RTCCKS0
0