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參數(shù)資料
型號: TLV5616CD
廠商: TEXAS INSTRUMENTS INC
元件分類: DAC
英文描述: SERIAL INPUT LOADING, 9 us SETTLING TIME, 12-BIT DAC, PDSO8
封裝: GREEN, PLASTIC, MS-012AA, SOIC-8
文件頁數(shù): 7/28頁
文件大小: 698K
代理商: TLV5616CD
TLV5616C, TLV5616I
2.7V TO 5.5V LOW POWER 12BIT DIGITALTOANALOG
CONVERTERS WITH POWER DOWN
SLAS152D DECEMBER 1997 REVISED APRIL 2004
15
WWW.TI.COM
APPLICATION INFORMATION
TLV5616 interfaced to MCS51 microcontroller
hardware interfacing
Figure 18 shows an example of how to connect the TLV5616 to an MCS51 compatible microcontroller. The
serial DAC input data and external control signals are sent via I/O port 3 of the controller. The serial data is sent
on the RxD line, with the serial clock output on the TxD line. P3.4 and P3.5 are configured as outputs to provide
the chip select and frame sync signals for the TLV5616.
SDIN
SCLK
CS
OUT
REFIN
AGND
REF
RxD
TxD
P3.4
MCS51 Controller
TLV5616
FS
P3.5
VDD
RLOAD
Figure 18. TLV5616 to MCS51 Controller Interface
software
The example program puts out a sine wave on the OUT pin.
The on-chip timer is used to generate interrupts at a fixed frequency. The related interrupt service routine fetches
and writes the next sample to the DAC. The samples are stored in a lookup table, which describes one full period
of a sine wave.
The serial port of the controller is used in mode 0, which transmits 8 bits of data on RxD, accompanied by a
synchronous clock on TxD. Two writes concatenated together are required to write a complete word to the
TLV5616. The CS and FS signals are provided in the required fashion through control of I/O port 3, which has
bit addressable outputs.
;***************************************************************************************
;* Title
: Ramp generation with TLV5616
*
;* Version : 1.0
*
;* MCU
: INTEL MCS51
*
;*
(1998) Texas Instruments Incorporated
*
;***************************************************************************************
;
; Program function declaration
;
NAME
GENSINE
MAIN
SEGMENT
CODE
ISR
SEGMENT
CODE
SINTBL SEGMENT
CODE
VAR1
SEGMENT
DATA
STACK
SEGMENT
IDATA
;
; Code start at address 0, jump to start
;
CSEG AT
0
MCS is a registered trademark of Intel Corporation
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