参数资料
型号: MXSIGDM
厂商: Microchip Technology
文件页数: 37/54页
文件大小: 0K
描述: BOARD DEMO PICTAIL MIXED SIGNAL
标准包装: 1
系列: PICtail™
主要目的: 用于 MCU 的混合信号:模数转换器,数模转换器,
嵌入式: 是,MCU,8 位
已用 IC / 零件: TX132x,MCP330x,320x,494x,3221,3201,1525,1541
主要属性: 3 个模数转换器,3 个数模转换器,2 个电压基准,5V 低压降
次要属性: DIP 开关,2 个 LED,PIC16F767
已供物品:
产品目录页面: 683 (CN2011-ZH PDF)
相关产品: MCP3221A5T-E/OTDKR-ND - IC ADC 12BIT 2.7V 1CH LP SOT23-5
MCP3221A5T-E/OTCT-ND - IC ADC 12BIT 2.7V 1CH LP SOT23-5
MCP3221A5T-I/OTDKR-ND - IC ADC 12BIT 2.7V 1CH LP SOT23-5
MCP3221A5T-E/OTTR-ND - IC ADC 12BIT 2.7V 1CH LP SOT23-5
MCP3221A5T-I/OTCT-ND - IC ADC 12BIT 2.7V 1CH LP SOT23-5
MCP3221A5T-I/OTTR-ND - IC ADC 12BIT 2.7V 1CH LP SOT23-5
DAC_dtmf.asm Source Code
; Y = 7 bit result X = step #
;
; Y = 63 + 64 * Sin (X * 360 / 32)
;
SINE_Table_7bit ;32 step
addwf PCL,F
nop ;this location is never used since W != 0
DT .63, .75, .87, .99, .108, .116, .122, .126
DT .127, .126, .122, .116, .108, .99, .87, .75
DT .63, .51, .39, .27, .18, .10, .4, .1
DT .0, .1, .4, .10, .18, .27, .39, .51
endif
; if _32_steps & _8_bit
;*************************************************************************************
**
; 32 step lookup table of an 8 bit SINE wave
; Y = 8 bit result
; X = step #
; Y = 127 + 128 * Sin (X * 360 / 32)
;
;SINE_Table_32step_8bit
; addwf PCL,F
; nop ;this location is never used since W != 0
; DT .127, .152, .176, .198, .218, .233, .245, .253
; DT .255, .253, .245, .233, .218, .198, .176, .152
; DT .127, .102, .78, .56, .36, .21, .9, .1
; DT .0, .1, .9, .21, .36, .56, .78, .102
; endif
if _16_steps
;
;*************************************************************************
; This is a 16 level lookup table of a 7 bit SINE wave
; Y = 7 bit result X = step #
;
; Y = 63 + 64 * Sin (X * 360 / 16)
;
SINE_Table_7bit ;16 step
addwf PCL,F
nop ;this location is never used since W != 0
DT .63, .87, .108, .122
DT .127, .122, .108, .87
DT .63, .39, .18, .4
DT .0, .4, .18, .39
endif
;
;*************************************************************************
;
; DTMF Frequency Tables
;
; Key Low High
; 0 941 1336
; 1 697 1209
; 2 697 1336
; 3 697 1477
; 4 770 1209
; 5 770 1336
; 6 770 1477
? 2004 Microchip Technology Inc.
DS51523A-page 33
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