Programming Model
MOTOROLA
Real-Time Clock (RTC)
23-15
23.2.10 Stopwatch Minutes Register
The stopwatch minutes (STPWCH) register contains the current stopwatch countdown value. When the
minute counter of the TOD clock increments, the value in this register decrements.
STPWCH
Stopwatch Minutes Register
Addr
0x0020401C
BIT
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
TYPE
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
RESET
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0x0000
BIT
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
CNT
TYPE
r
r
r
r
r
r
r
r
r
r
rw
rw
rw
rw
rw
rw
RESET
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0x003F
Table 23-12. Stopwatch Minutes Register Description
Name
Description
Settings
Reserved
Bits 31–6
Reserved—These bits are reserved and should read 0.
CNT
Bits 5–0
Stopwatch Count
—Contains the stopwatch countdown value.
Note:
The stopwatch counter is decremented by the minute (MIN)
tick output from the real-time clock, so the average tolerance of the
count is 0.5 minutes. For better accuracy, enable the stopwatch by
polling the MIN bit of the RTCISR register or by polling the minute
interrupt service routine.
These bits can be set to
any value between 0 and
62. When the countdown
has completed, the value
will not change until a
nonzero value (1–62) is
written.
Summary of Contents for DragonBall MC9328MX1
Page 68: ...1 12 MC9328MX1 Reference Manual MOTOROLA Introduction ...
Page 86: ...2 18 MC9328MX1 Reference Manual MOTOROLA Signal Descriptions and Pin Assignments ...
Page 116: ...3 30 MC9328MX1 Reference Manual MOTOROLA Memory Map ...
Page 126: ...4 10 MC9328MX1 Reference Manual MOTOROLA ARM920T Processor ...
Page 160: ...8 8 MC9328MX1 Reference Manual MOTOROLA System Control ...
Page 272: ...13 32 MC9328MX1 Reference Manual MOTOROLA DMA Controller ...
Page 281: ...Programming Model MOTOROLA Watchdog Timer Module 14 9 ...
Page 282: ...14 10 MC9328MX1 Reference Manual MOTOROLA Watchdog Timer Module ...
Page 300: ...15 18 MC9328MX1 Reference Manual MOTOROLA Analog Signal Processor ASP ...
Page 438: ...18 16 MC9328MX1 Reference Manual MOTOROLA Serial Peripheral Interface Modules SPI 1 and SPI 2 ...
Page 478: ...19 40 MC9328MX1 Reference Manual MOTOROLA LCD Controller ...
Page 574: ...21 32 MC9328MX1 Reference Manual MOTOROLA Memory Stick Host Controller MSHC Module ...
Page 598: ...23 16 MC9328MX1 Reference Manual MOTOROLA Real Time Clock RTC ...
Page 670: ...24 72 MC9328MX1 Reference Manual MOTOROLA SDRAM Memory Controller ...
Page 726: ...25 56 MC9328MX1 Reference Manual MOTOROLA SmartCard Interface Module SIM ...
Page 736: ...26 10 MC9328MX1 Reference Manual MOTOROLA General Purpose Timers ...
Page 854: ...29 18 MC9328MX1 Reference Manual MOTOROLA I2C Module ...
Page 900: ...30 46 MC9328MX1 Reference Manual MOTOROLA Synchronous Serial Interface SSI ...
Page 942: ...32 26 MC9328MX1 Reference Manual MOTOROLA GPIO Module and I O Multiplexer IOMUX ...