Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

A8351601L-40 Datasheet(PDF) 24 Page - AMIC Technology

Part No. A8351601L-40
Description  Bar Code Reader
Download  44 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  AMICC [AMIC Technology]
Direct Link  http://www.amictechnology.com
Logo AMICC - AMIC Technology

A8351601L-40 Datasheet(HTML) 24 Page - AMIC Technology

Back Button A8351601L-40 Datasheet HTML 20Page - AMIC Technology A8351601L-40 Datasheet HTML 21Page - AMIC Technology A8351601L-40 Datasheet HTML 22Page - AMIC Technology A8351601L-40 Datasheet HTML 23Page - AMIC Technology A8351601L-40 Datasheet HTML 24Page - AMIC Technology A8351601L-40 Datasheet HTML 25Page - AMIC Technology A8351601L-40 Datasheet HTML 26Page - AMIC Technology A8351601L-40 Datasheet HTML 27Page - AMIC Technology A8351601L-40 Datasheet HTML 28Page - AMIC Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 24 / 44 page
background image
A8351601 Series
(July, 2002, Version 1.0)
23
AMIC Technology, Inc.
As data bits come in from the right, 1s shift to the left.
When the start bit arrives at the leftmost position in the
shift register, (which is a 9-bit register in Mode 1), it flags
the RX Control block to do one last shift, load SBUF and
RB8, and set RI. The signal to load SBUF and RB8 and to
set RI is generated if, and only if, the following conditions
are met at the time the final shift pulse is generated.
1. RI = 0 and
2. Either SM2 = 0, or the received stop bit =1
If either of these two conditions is not met, the received
frame is irretrievably lost. If both conditions are met, the
stop bit goes into RB8, the eight data bits go into SBUF,
and RI is activated. At this time, whether or not the above
conditions are met, the unit continues looking for a 1-to-0
transition in RXD.
More About Modes 2 and 3
Eleven bits are transmitted (through TXD), or received
(through RXD): a start bit (0), 8 data bits (LSB first), a
programmable ninth data bit, and a stop bit (1). On
transmit, the ninth data bit (TB8) can be assigned the value
of 0 or 1. On receive, the ninth data bit goes into RB8 in
SCON. The baud rate is programmable to either 1/32 or
1/64 of the oscillator frequency in Mode 2. Mode 3 may
have a variable baud rate generated from either Timer 1 or
2, depending on the state of TCLK and RCLK.
Figures 11 and 12 show a functional diagram of the serial
port in Modes 2 and 3. The receive portion is exactly the
same as in Mode 1. The transmit portion differs from Mode
1 only in the ninth bit of the transmit shift register.
Transmission is initiated by any instruction that uses SBUF
as a destination register. The "write to SBUF" signal also
loads TB8 into the ninth bit position of the transmit shift
register and flags the TX Control unit that a transmission is
requested. Transmission commences at S1P1 of the
machine cycle following the next rollover in the divide-by-
16 counter. Thus, the bit times are synchronized to the
divide-by-16 counter, not to the "write to SBUF" signal.
The transmission begins when SEND is activated, which
puts the start bit at TXD. One bit timer later, DATA is
activated, which enables the output bit of the transmit shift
register to TXD. The first shift pulse occurs one bit time
after that. The first shift clocks a 1 (the stop bit) into the
ninth bit position of the shift register. Thereafter, only 0s
are clocked in. Thus, as data bits shift out to the right, 0s
are clocked in from the left. When TB8 is at the output
position of the shift register, then the stop bit is just to the
left of TB8, and all positions to the left of that contain 0s.
This condition flags the TX Control unit to do one last shift,
then deactivate SEND and set TI. This occurs at the 11th
divide-by-16 rollover after "write to SBUF".
Reception is initiated by a 1-to-0 transition detected at
RXD. For this purpose, RXD is sampled at a rate of 16
times the established baud rate. When a transition is
detected, the divide-by-16 counter is immediately reset,
and 1FFH is written to the input shift register.
At the seventh, eighth, and ninth counter states of each bit
time, the bit detector samples the value of RXD. The value
accepted is the value that was seen in at least two of the
three samples. If the value accepted during the first bit time
is not 0, the receive circuits are reset and the unit
continues looking for another 1-to-0 transition. If the start
bit proves valid, it is shifted into the input shift register, and
reception of the rest of the frame proceeds.
As data bits come in from the right, Is shift out to the left.
When the start bit arrives at the leftmost position in the
shift register (which in Modes 2 and 3 is a 9-bit register), it
flags the RX Control block to do one last shift, load SBUF
and RB8, and set RI. The signal to load SBUF and RB8
and to set RI is generated if, and only if, the following
conditions are met at the time the final shift pulse is
generated:
1. RI = 0, and
2. Either SM2 = 0 or the received 9th data bit = 1
If either of these conditions is not met, the received frame
is irretrievably lost, and RI is not set. If both conditions are
met, the received ninth data bit goes into RB8, and the first
eight data bits go into SBUF. One bit time later, whether
the above conditions were met or not, the unit continues
looking for a 1-to-0 transition at the RXD input.
Note that the value of the received stop bit is irrelevant to
SBUF, RB8, or RI.
Table 10. Serial Port Setup
Mode
SCON
SM2Variation
0
10H
1
50H
2
90H
3
D0H
Single Processor
Environment
(SM2=0)
0
NA
1
70H
2
B0H
3
F0H
Multiprocessor
Environment
(SM2=1)


Similar Part No. - A8351601L-40

ManufacturerPart No.DatasheetDescription
AMIC Technology
AMIC Technology
A83516 AMICC-A83516 Datasheet
270Kb / 12P
   8 Bit Microcontroller
A83516-12 AMICC-A83516-12 Datasheet
270Kb / 12P
   8 Bit Microcontroller
A83516-24 AMICC-A83516-24 Datasheet
270Kb / 12P
   8 Bit Microcontroller
A83516-40 AMICC-A83516-40 Datasheet
270Kb / 12P
   8 Bit Microcontroller
A83516L-12 AMICC-A83516L-12 Datasheet
270Kb / 12P
   8 Bit Microcontroller
More results

Similar Description - A8351601L-40

ManufacturerPart No.DatasheetDescription
Agilent(Hewlett-Packard)
Agilent(Hewlett-Packard...
HBCS-7100 HP-HBCS-7100 Datasheet
156Kb / 6P
   Industrial Digital Bar Code Slot Reader
HBSW-8000 HP-HBSW-8000 Datasheet
164Kb / 5P
   Hewlett-Packard SmartWand Bar Code Reader
Festo Corporation.
Festo Corporation.
2930239 FESTO-2930239 Datasheet
83Kb / 2P
   Code Reader
2930240 FESTO-2930240 Datasheet
83Kb / 2P
   Code Reader
8058723 FESTO-8058723 Datasheet
83Kb / 2P
   Code Reader
2930233 FESTO-2930233 Datasheet
84Kb / 2P
   Code Reader
2930237 FESTO-2930237 Datasheet
83Kb / 2P
   Code Reader
8058715 FESTO-8058715 Datasheet
84Kb / 2P
   Code Reader
8058717 FESTO-8058717 Datasheet
83Kb / 2P
   Code Reader
8058722 FESTO-8058722 Datasheet
92Kb / 2P
   Code Reader
More results


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44 


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz