sc9s12hy64j0vllr Freescale Semiconductor, Inc, sc9s12hy64j0vllr Datasheet - Page 246

• Manufacturer Part Number: sc9s12hy64j0vllr
• Description: S12 Microcontrollers Mcu 16-bit Hcs12 Cisc 32kb Flash 5v Tray
• Manufacturer: Freescale Semiconductor, Inc

S12 Clock, Reset and Power Management Unit (S12CPMU) Block Description
7.3.2.9
This register controls the COP (Computer Operating Properly) watchdog.
The clock source for the COP is either IRCCLK or OSCCLK depending on the setting of the
COPOSCSEL bit. In Stop Mode with PSTP=1 (Pseudo Stop Mode), COPOSCSEL=1 and PCE=1 the COP
continues to run, else the COP counter halts in Stop Mode.
Read: Anytime
Write:
When a non-zero value is loaded from Flash to CR[2:0] the COP time-out period is started.
A change of the COPOSCSEL bit (writing a different value or loosing UPOSC status) re-starts the COP
time-out period.
In normal mode the COP time-out period is restarted if either of these conditions is true:
In special mode, any write access to CPMUCOP register restarts the COP time-out period.
246
0x003C
After de-assert of System Reset the values are automatically loaded from the Flash memory. See Device specification for
Reset
1. RSBCK: anytime in special mode; write to “1” but not to “0” in normal mode
2. WCOP, CR2, CR1, CR0:
1. Writing a non-zero value to CR[2:0] (anytime in special mode, once in normal mode) with
2. Writing WCOP bit (anytime in special mode, once in normal mode) with WRTMASK = 0.
3. Changing RSBCK bit from “0” to “1”.
details.
W
R
— Anytime in special mode, when WRTMASK is 0, otherwise it has no effect
— Write once in normal mode, when WRTMASK is 0, otherwise it has no effect.
WRTMASK = 0.
– Writing CR[2:0] to “000” has no effect, but counts for the “write once” condition.
– Writing WCOP to “0” has no effect, but counts for the “write once” condition.
WCOP
S12CPMU COP Control Register (CPMUCOP)
F
7
= Unimplemented or Reserved
RSBCK
Figure 7-12. S12CPMU COP Control Register (CPMUCOP)
0
6
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
WRTMASK
0
0
5
0
0
4
0
0
3
CR2
F
2
Freescale Semiconductor
CR1
F
1
CR0
F
0