- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1949 > MC68HC16Z1VEH16 (Freescale Semiconductor)IC MCU 16BIT 1K FLASH 132-PQFP PDF資料下載
參數(shù)資料
| 型號： | MC68HC16Z1VEH16 |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 41/56頁 |
| 文件大小： | 0K |
| 描述： | IC MCU 16BIT 1K FLASH 132-PQFP |
| 標(biāo)準(zhǔn)包裝： | 36 |
| 系列： | HC16 |
| 核心處理器： | CPU16 |
| 芯體尺寸： | 16-位 |
| 速度： | 16MHz |
| 連通性： | EBI/EMI，SCI，SPI |
| 外圍設(shè)備： | POR，PWM，WDT |
| 輸入/輸出數(shù)： | 16 |
| 程序存儲器類型： | ROMless |
| RAM 容量： | 1K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.7 V ~ 5.5 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 8x10b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 105°C |
| 封裝/外殼： | 132-BQFP 緩沖式 |
| 包裝： | 托盤 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁當(dāng)前第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁
MC68HC16Z1TUT/D
BCLRW
TFLG1 $4000
;clear TOC4 flag
RTI
OC1_INT:
;interrupt routine for OC1
LDAB
OC1D
BNE
DRIVE_PINS_LO
;branch if pins are high
BSETW
OC1M $0038
;set OC1-3 to go high at next match
BRA
GET_TOC1
DRIVE_PINS_LO:
BCLRW
OC1M $0038
;set OC1-3 to go low at next match
GET_TOC1:
LDD
TOC1
ADDD
#$100
STD
TOC1
;add #$100 to value in OC1 register
BCLRW
TFLG1 $0800
;clear TOC1 flag
RTI
INT:
RTI
;unused interrupts point here
4.6 Configuring the Analog-to-Digital Converter
The analog-to-digital converter (ADC) takes an analog voltage as an input, and provides a digital read-
ing. It has eight channels and selectable 8- or 10-bit resolution. Each result is available in three formats:
right-justified unsigned, left-justified signed, and left-justified unsigned, depending on the address from
which it is read. The ADC can also be used for digital I/O. Port ADA is an input-only port, and port ADB
is an output-only port. Data in these two ports resides in the port data register (called PDR in older man-
uals and PORTADA in newer manuals).
In order to use the ADC as an analog-to-digital converter, the user must be sure to properly connect the
following pins:
VRH and VRL: These are the analog reference voltages that are connected to the analog reference
pins. The ADC uses them as a reference to determine the range of voltage it can expect on the
analog input pins. Because they are separated from the analog power supply pins (VDDA and VSSA),
they can (and should) be connected to regulated and filtered supplies to allow the ADC to achieve
its highest degree of accuracy. Any noise on these two pins will translate into errors in the conver-
sion results. The use of bypass capacitors or low-pass filtering is recommended. In addition, VRH
must be less than or equal to VDDA, and VRL must be greater than or equal to VSSA.
VDDA and VSSA: These pins supply power to the analog circuitry associated with the sample am-
plifier and RC DAC array. Other circuitry in the ADC is powered from the digital power bus (pins
VDDI and VSSI). Dedicated power for the RC DAC array is necessary to isolate sensitive analog cir-
cuitry from noise on the digital power bus. The power to VDDA and VSSA should be as quiet as pos-
sible.
Analog input pins (AN[0:7]): These are the actual input pins to the converter. The input to these
pins must be within the range specified by VRH and VRL. The ADC converts the analog input on
these pins to digital data. These inputs should have low AC impedance at the pins. This can be ac-
complished by placing a capacitor with good high frequency characteristics at the input pin. A series
resistor can also be used to implement a simple RC filter. However, when using a series resistor,
the user must consider the source impedance of the circuit supply the analog signal and any leak-
age that may occur.
It is imperative that for greatest accuracy in conversions, the analog power supply and reference volt-
ages must be isolated from the digital power bus. There must be low impedance paths between all an-
alog ground points in the circuit. Use large-width PC board traces for routing power to decrease
impedance between analog reference points, increase the effectiveness of decoupling/filtering, and de-
crease the chance of high frequency cross-coupling. For best results, carve an analog ground plane out
of the digital ground plane. Chapter 6 of the
ADC Reference Manual (ADCRM/AD) has more information
on pin connection considerations.
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68HC705B16NCFN | IC MCU 2.1MHZ 15K OTP 52-PLCC |
| MC68HC705C9ACFB | IC MCU 16K 2.1MHZ OTP 44-QFP |
| MC68HC705JP7CDW | IC MCU 8BIT 28-SOIC |
| MC68HC705KJ1CP | IC MCU 4MHZ 1.2K OTP 16-DIP |
| MC68HC705P6ACP | IC MCU 2.1MHZ 4.5K OTP 28-DIP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC16Z1VEH16 | 制造商:Freescale Semiconductor 功能描述:Microcontroller |
| MC68HC16Z1VFC16 | 制造商:Rochester Electronics LLC 功能描述:16 BIT MCU, 1K RAM - Bulk |
| MC68HC16Z3BCFC16 | 制造商:Rochester Electronics LLC 功能描述: |
| MC68HC16Z3BCPV16 | 制造商:Rochester Electronics LLC 功能描述:16BIT MCU, 4KRAM, 8KROM - Bulk |
| MC68HC16Z3BCPV25 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Freescale Semiconductor 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。