參數(shù)資料
型號(hào): HC05PL4GRS
英文描述: 68HC05PL4A. 68HC05PL4B. 68HC705PL4B General Release Specification
中文描述: 68HC05PL4A。 68HC05PL4B。 68HC705PL4B一般版本規(guī)范
文件頁數(shù): 63/98頁
文件大?。?/td> 1004K
代理商: HC05PL4GRS
April 30, 1998
GENERAL RELEASE SPECIFICATION
MC68HC05PL4
REV 2.0
8-BIT TIMER
MOTOROLA
10-1
SECTION 10
8-BIT TIMER
This section describes the 8-bit count down timer module.
10.1
OVERVIEW
Figure 10-1. Timer8 Block Diagram
As shown in
Figure 10-1
this timer contains a single 8-bit software programmable
countdown timer counter with a 3-bit software control prescaler. The counter’s
value may be preset under software control and counts down to zero. When the
counter decrements to zero, the timer8 interrupt request bit (T8IF in T8CR) is set.
Then if the timer interrupt is enabled (T8IE in T8CR is set) and the I-bit of the con-
dition code register are is cleared, the processor receives an interrupt. After com-
pletion of the current instruction, the processor proceeds to store the appropriate
registers on the stack and then fetches the timer8 interrupt vector in order to begin
serving the interrupt.
Interrupt Circuit
Timer8 Counter Register ($0E)
T8IF T8IFR T8IE
T8EN PS2
PS1
PS0
Timer8 Control and Status Register ($0D)
Overflow
Detect
Circuit
8-bit count-down timer counter
7-bit prescaler counter
Prescaler
Select
Logic
(8 to 1 MUX)
I
8
8
8
8
Internal
Bus Clock
To COP
Watchdog
Circuit
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
相關(guān)PDF資料
PDF描述
HC05V7GRS 68HC05V7 General Release Specification
HC05 Bipolar Transistor; Transistor Polarity:Dual P Channel; Power Dissipation:20W; DC Current Gain Min (hfe):25; Collector Current:1A; DC Current Gain Max (hfe):200; Power (Ptot):20W
HC1-5502A-7 Subscriber Line Interface Circuit
HC4P-5502A-7 Subscriber Line Interface Circuit
HC1062A Low Voltage Telephone Speech Transmission Circuit / High/Low Level Mute
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HC05V7GRS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:68HC05V7 General Release Specification
HC060WE1DS038B 制造商:TE Connectivity 功能描述:EC7174-000
HC060YW1DS038B 制造商:TE Connectivity 功能描述:EC7207-000
HC06B05000J0G 制造商:FCI 功能描述:OEM ITEM 505-5BNF-SPRING CLAMP SYSTEM
HC08 制造商:Texas Instruments 功能描述: