參數(shù)資料
型號: MC68HC05CL48
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 1.802 MHz, MICROCONTROLLER, PQFP112
封裝: TQFP-112
文件頁數(shù): 110/145頁
文件大?。?/td> 673K
代理商: MC68HC05CL48
June 11, 1997
GENERAL RELEASE SPECIFICATION
MC68HC05CL48
TIMER
MOTOROLA
REV 2.0
8-15
timer chain. This circuit is followed by two more stages, with the resulting clock (E/
16384) driving the Real Time Interrupt circuit. The RTI circuit consists of three
divider stages with a 1 of 4 selector. The output of the RTI circuit is further divided
by eight to drive the optional COP Watchdog Timer circuit. The RTI rate selector
bits, and the RTI and CTOF enable bits and ags are located in the Ctimer Control
and Status Register(CTCSR) at location $08.
Figure 8-6. Core Timer Block Diagram
COP
Clear
Internal Bus
$09 CTCR
7-bit counter
Interrupt Circuit
$08 CTCSR
RTI Select Circuit
Overow
Circuit
Detect
COP Watchdog
Resetable Timer(
÷8)
To Interrupt
Logic
88
fop
fop/2
2
fop/2
10
POR
TCBP
TCSR
TCR
Internal
Processor
Clock
RTIF
CTimer Control & Status Register
Core Timer Counter Register (TCR)
÷4
CTOFE
-
RTIE
CTOF
RT1
-
RT0
To Reset
Logic
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