MC68HC05V12 Datasheet, PDF (88/246 Pages) Freescale Semiconductor, Inc – HCMOS Microcontreller Unit

Core Timer
Freescale Semiconductor, Inc.
optional COP watchdog timer circuit. The RTI rate selector bits and the
RTI and CTOF enable bits and flags are located in the timer control and
status register at location $08.
88
CTCR
INTERNAL BUS
COP
INTERNAL PERIPHERAL CLOCK (E) _CLEAR
E/2²
$09 CORE TIMER COUNTER REGISTER (CTCR)
E/210
DIVIDE
/4
E / 212
POR
E / 29
5-BIT COUNTER
E / 214 E / 213 E / 212 E / 211
RTI SELECT CIRCUIT
OVERFLOW
DETECT
CIRCUIT
RTI_out
CTSCR _{CTOF RTIF TOFE RTIE TOFC RTFC RT1 RT0 $08} TIMER CONTROL &
STATUS REGISTER
INTERRUPT CIRCUIT
COP WATCHDOG
TIMER (÷ 8)
2³
TO INTERRUPT
LOGIC
TO RESET
LOGIC
Figure 8-1. Core Timer Block Diagram
Technical Data
Core Timer
For More Information On This Product,
Go to: www.freescale.com
MC68HC05V12 — Rev. 2.0