參數(shù)資料
型號: MC68HC16Y1
廠商: Motorola, Inc.
英文描述: 16-Bit Modular Microcontroller(16位模塊化微控制器)
中文描述: 16位微控制器模塊(16位模塊化微控制器)
文件頁數(shù): 43/122頁
文件大?。?/td> 749K
代理商: MC68HC16Y1
MC68HC16Y1
MC68HC16Y1TS/D
MOTOROLA
43
Both writes must occur in the order listed prior to time-out, but any number of instructions can be exe-
cuted between the two writes.
Watchdog clock rate is affected by SWP and SWT in SYPCR.
When SWT[1:0] are modified, a watchdog service sequence must be performed before the new time-
out period will take effect.
The reset value of SWP is the complement of the state of the MODCLK pin on the rising edge of reset.
Software watchdog time-out period is given by the following equation:
Time-Out Period = Divide Count/EXTAL Frequency
3.4 System Clock
The system clock in the SCIM provides timing signals for the IMB modules and for an external peripheral
bus. Because the MC68HC16Y1 is a fully static design, register and memory contents are not affected
when clock rate changes. System hardware and software support changes in clock rate during opera-
tion.
The system clock signal can be generated in three ways. An internal phase-locked loop can synthesize
the clock from either an internal or an external frequency source, or the clock signal can be input from
an external source.
Following is a block diagram of the clock submodule.
Figure 5 System Clock Block Diagram
SYS CLOCK
BLOCK 32KHZ
CLKOUT
EXTAL
PHASE
COMPARATOR
LOW-PASS
FILTER
VCO
CRYSTAL
OSCILLATOR
SYSTEM
CLOCK
SYSTEM CLOCK CONTROL
XTAL
XFC PIN
VDDSYN
XFC1
0.1
μ
F
.01
μ
F
0.1
μ
F
FEEDBACK DIVIDER
22 pF2
10M
330 k
W
X
Y
VSSI
22 pF2
VSSI
VSSI
VDDSYN
1. Must be low-leakage capacitor (insulation resistance 30,000 M
or greater).
2. Capacitance based on a test circuit constructed with a DAISHINKU DMX-38 32.768-kHz crystal.
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參數(shù)描述
MC68HC16Z1CAG 制造商:Freescale Semiconductor 功能描述:
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MC68HC16Z1CAG16 制造商:Freescale Semiconductor 功能描述:IC16-BIT MICROCONTROLLER
MC68HC16Z1CAG20 功能描述:16位微控制器 - MCU 16 BIT MCU 1K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風格:SMD/SMT
MC68HC16Z1CAG20 制造商:Freescale Semiconductor 功能描述:Microcontroller