参数资料
型号: MC68HC05V7FN
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC68
封装: PLASTIC, LCC-68
文件页数: 159/170页
文件大小: 589K
代理商: MC68HC05V7FN
SECTION 12: CORE TIMER
MOTOROLA
Page 75
MC68HC05V7 Specification Rev. 1.0
SECTION 12
CORE TIMER
The Core Timer for this device is a 12-stage multifunctional ripple counter. The features
include Timer Over Flow, Power-On Reset (POR), Real Time Interrupt (RTI), and COP
Watchdog Timer.
Figure 12-1:
Core Timer Block Diagram
COP
Clear
Internal Bus
$09 Core Timer Counter Register (CTCR)
5-bit counter
CTOF RTIF
TOFE RTIE
RT1
Interrupt Circuit
$08
RTI Select Circuit
Status Register
RT0
Timer Control &
Overflow
Circuit
Detect
COP Watchdog
Timer (
÷8)
To Reset
Logic
8
RTFC
TOFC
E/2
10
TCBP
CTCSR
CTCR
Internal Peripheral Clock
(Ε)
To Interrupt
Logic
RTIout
E / 2
12
POR
E/22
div
/4
E / 2
9
E / 2
14
E / 2
13
E / 2
12
E / 2
11
23
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