công cụ tìm kiếm bảng dữ liệu linh kiện điện tử
  Vietnamese  ▼
ALLDATASHEET.VN

X  

54ACT715-R bảng dữ liệu(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện 54ACT715-R
Giải thích chi tiết về linh kiện  Programmable Video Sync Generator
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
Logo NSC - National Semiconductor (TI)

54ACT715-R bảng dữ liệu(HTML) 7 Page - National Semiconductor (TI)

Back Button 54ACT715-R Datasheet HTML 3Page - National Semiconductor (TI) 54ACT715-R Datasheet HTML 4Page - National Semiconductor (TI) 54ACT715-R Datasheet HTML 5Page - National Semiconductor (TI) 54ACT715-R Datasheet HTML 6Page - National Semiconductor (TI) 54ACT715-R Datasheet HTML 7Page - National Semiconductor (TI) 54ACT715-R Datasheet HTML 8Page - National Semiconductor (TI) 54ACT715-R Datasheet HTML 9Page - National Semiconductor (TI) 54ACT715-R Datasheet HTML 10Page - National Semiconductor (TI) 54ACT715-R Datasheet HTML 11Page - National Semiconductor (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 16 page
background image
Addressing Logic (Continued)
Address 19–21Unused
Address 22/54Restart Vector (Restarts Device)
Address 23/55Clear Vector (Zeros All Registers)
Address 24–31Unused
Address 32–50Register Scan Addresses
Address 51–53Counter Scan Addresses
Address 56–63Unused
At any given time only one register at most is selected. It is
possible to have no registers selected.
VECTORED RESTART ADDRESS
The function of addresses 22 (16H) or 54 (36H) are similar to
that of the CLR pin except that the preprogramming of the
registers is not affected. It is recommended but not required
that this address is read after the initial device configuration
load sequence. A 1 on the ADDRDATA pin (Auto Addressing
Mode) will not cause this address to automatically incre-
ment. The address will loop back onto itself regardless of the
state of ADDRDATA unless the address on the Data inputs
has been changed with ADDRDATA at 0.
VECTORED CLEAR ADDRESS
Addresses 23 (17H) or 55 (37H) is used to clear all registers
to zero simultaneously. This function may be desirable to use
prior to loading new data into the Data or Status Registers.
This address is read into the device in a similar fashion as all
of the other registers. A 1 on the ADDRDATA pin (Auto Ad-
dressing Mode) will not cause this address to automatically
increment. The address will loop back onto itself regardless
of the state of ADDRDATA unless the address on the Data
inputs has been changed with ADDRDATA at 0.
GEN LOCKING
The ’ACT715/LM1882 and ’ACT715-R/LM1882-R is de-
signed for master SYNC and BLANK signal generation.
However, the devices can be synchronized (slaved) to an ex-
ternal timing signal in a limited sense. Using Vectored Re-
start, the user can reset the counting sequence to a given lo-
cation, the beginning, at a given time, the rising edge of the
LOAD that removes Vector Restart. At this time the next
CLOCK pulse will be CLOCK 1 and the count will restart at
the beginning of the first odd line.
Preconditioning the part during normal operation, before the
desired synchronizing pulse, is necesasry. However, since
LOAD and CLOCK are asynchronous and independent, this
is possible without interruption or data and performance cor-
ruption. If the defaulted 14.31818 MHz RS-170 values are
being used, preconditioning and restarting can be minimized
by using the CLEAR pulse instead of the Vectored Restart
operation. The ’ACT715-R/LM1882-R is better suited for this
application because it eliminates the need to program a 1
into Bit 10 of the Status Register to enable the CLOCK. Gen
Locking to another count location other than the very begin-
ning or separate horizontal/vertical resetting is not possible
with the ’ACT715/LM1882 nor the ’ACT715-R/LM1882-R.
SCAN MODE LOGIC
A scan mode is available in the ACT715/LM1882 that allows
the user to non-destructively verify the contents of the regis-
ters. Scan mode is invoked through reading a scan address
into the address register. The scan address of a given regis-
ter is defined by the Data register address + 32. The internal
Clocking signal is disabled when a scan address is read.
Disabling the clock freezes the device in it’s present state.
Data can then be serially scanned out of the data registers
through the ODD/EVEN Pin. The LSB will be scanned out
first. Since each register is 12 bits wide, completely scanning
out data of the addressed register will require 12 CLOCK
pulses. More than 12 CLOCK pulses on the same register
will only cause the MSB to repeat on the output.
Re-scanning the same register will require that register to be
reloaded. The value of the two horizontal counters and 1 ver-
tical counter can also be scanned out by using address num-
bers 51–53. Note that before the part will scan out the data,
the LOAD signal must be brought back HIGH.
Normal device operation can be resumed by loading in a
non-scan address. As the scanning of the registers is a
non-destructive scan, the device will resume correct opera-
tion from the point at which it was halted.
RS170 Default Register Values
The tables below show the values programmed for the
RS170 Format (using a 14.31818 MHz clock signal) and
how they compare against the actual EIA RS170 Specifica-
tions. The default signals that will be output are CSYNC,
CBLANK, HDRIVE and VDRIVE. The device initially starts at
the beginning of the odd field of interlace. All signals have
active low pulses and the clock is disabled at power up. Reg-
isters 13 and 14 are not involved in the actual signal informa-
tion. If the Vertical Interrupt was selected so that a pulse in-
dicating the active lines would be output.
DS100232-9
FIGURE 4. ADDRDEC Timing
www.national.com
7


Số phần tương tự - 54ACT715-R

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
National Semiconductor ...
54ACT74 NSC-54ACT74 Datasheet
180Kb / 8P
   Dual D-Type Positive Edge-Triggered Flip-Flop
logo
Silicon Supplies
54ACT74 SS-54ACT74 Datasheet
505Kb / 6P
   Advanced CMOS TTL Input
54ACT74 SS-54ACT74 Datasheet
504Kb / 6P
   Advanced CMOS TTL Input
More results

Mô tả tương tự - 54ACT715-R

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Fairchild Semiconductor
74ACT715 FAIRCHILD-74ACT715_07 Datasheet
451Kb / 18P
   Programmable Video Sync Generator
74ACT715 FAIRCHILD-74ACT715_1 Datasheet
429Kb / 18P
   Programmable Video Sync Generator
logo
National Semiconductor ...
LM1882 NSC-LM1882 Datasheet
340Kb / 16P
   Programmable Video Sync Generator
logo
Fairchild Semiconductor
74ACT715 FAIRCHILD-74ACT715 Datasheet
127Kb / 14P
   Programmable Video Sync Generator
logo
Harris Corporation
CD22402 HARRIS-CD22402 Datasheet
76Kb / 11P
   Sync Generator for TV Applications and Video Processing Systems
logo
Texas Instruments
LM1881MX TI1-LM1881MX Datasheet
1Mb / 18P
[Old version datasheet]   Video Sync Separator
logo
Siemens Semiconductor G...
SDA9257 SIEMENS-SDA9257 Datasheet
1Mb / 36P
   Clock Sync Generator
logo
National Semiconductor ...
LM1881 NSC-LM1881_06 Datasheet
687Kb / 12P
   Video Sync Separator
logo
NTE Electronics
NTE7049 NTE-NTE7049 Datasheet
30Kb / 3P
   Integrated Circuit CMOS-Sync Generator for TV & Video Processing Systems
logo
NXP Semiconductors
SAA1101 PHILIPS-SAA1101 Datasheet
112Kb / 18P
   Universal sync generator USG
January 1990
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


bảng dữ liệu tải về

Go To PDF Page


Link URL




Chính sách bảo mật
ALLDATASHEET.VN
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không?  [ DONATE ] 

Alldatasheet là   |   Quảng cáo   |   Liên lạc với chúng tôi   |   Chính sách bảo mật   |   Trao đổi link   |   Tìm kiếm theo nhà sản xuất
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
Family Site : ic2ic.com  |   icmetro.com