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TW2835 Schematic ( PDF Datasheet ) - Techwell

Teilenummer TW2835
Beschreibung 4 Channel Video and Audio Controller
Hersteller Techwell
Logo Techwell Logo 




Gesamt 70 Seiten
TW2835 Datasheet, Funktion
TW2835
4 Channel Video and Audio Controller
For Security Applications
Preliminary Data Sheet from Techwell, Inc.
Information may change without notice
Disclaimer
This document provides technical information for the user. Techwell Inc. reserves the right to
modify the information in this document as necessary. The customer should make sure that
they have the most recent data sheet version. Techwell Inc. holds no responsibility for any
errors that may appear in this document. Customers should take appropriate action to ensure
their use of the products does not infringe upon any patents. Techwell Inc. respects valid
patent rights of third parties and does not infringe upon or assist others to infringe upon such
rights.
Techwell, Inc.
www.techwellinc.com
1
Oct, 10, 2006
Datasheet Rev. 1.2
www.DataSheet.in






TW2835 Datasheet, Funktion
TW2835 Video and Audio Controller
Preliminary
Horizontal/Vertical mirroring for each channel
Last image captured when video-loss detected
Auto sequence switch with 128 queues and/or manual switch by interrupt for record path
Channel skip in auto sequence switch for record path when video-loss detected
Image enhancement for zoomed or still image in display path
High performance 2X zoom to horizontal and vertical direction for display path
Extendable up to 8/16 channel video controller using cascade connection
Quad MUX switch with 32 queues and/or manual control by interrupt for record path
64 color bitmap OSD overlay with 720x480 in NTSC / 720x588 resolution in PAL
Four programmable single boxes and four 2D arrayed boxes overlay
Mouse pointer overlay
Dual Video Encoders
Dual path digital outputs with ITU-R BT.656 standard
Dual path analog outputs with all analog NTSC/PAL standards
Programmable bandwidth of luminance and chrominance signal for each path
Three 10bit video CMOS DACs
Audio CODEC
Integrated four audio ADCs and one audio DAC
Provides multi-channel audio mixed analog output
Supports a standard I2S interface for record output and playback input
8/16 bit audio word length
Sample audio with 8/16KHz
Applications
Analog QUAD/MUX System
4/8/16 Channel DVR System
Car Rear Vision System
Hair Shop System
Dental Care System
Techwell, Inc.
www.techwellinc.com
www.DataSheet.in
6
Oct, 10, 2006
Datasheet Rev. 1.2

6 Page









TW2835 pdf, datenblatt
TW2835 Video and Audio Controller
Preliminary
Memory Interface Pins
Name
DATA[31:0]
ADDR[10:0]
BA1
Number
Type
QFP LBGA
76,77, R8,P8,
78,79, N8,T9,
80,82, R9,P9,
83,84, N9,R10,
85,86, P10,T11,
88,89, R11,P11,
90,91, N11,T12,
92,94, R12,P12,
118,119, L15,L14,
120,121, L13,K15,
123,124, K14,J16,
125,126, J15,J14,
127,129, J13,H16,
130,131, H15,H14,
132,134, H13,G15,
135,136 G14,F16
95,96, N12,R13,
97,98, P13,T14,
100,101, R14,P14,
102,103, T15,R15,
106,107, R16,P16,
108 P15
I/O
O
109 N15 O
Description
SDRAM data bus.
SDRAM address bus. ADDR[10] is AP.
SDRAM bank1 selection.
BA0 111 N14 O SDRAM bank0 selection.
RASB
113 M15 O SDRAM row address selection.
CASB
114 M14 O SDRAM column address selection.
WEB
115 M13 O SDRAM write enable.
DQM
117 L16 O SDRAM write mask.
CLK54MEM 112
M16 O SDRAM clock.
Techwell, Inc.
www.techwellinc.com
www.DataSheet.in
12
Oct, 10, 2006
Datasheet Rev. 1.2

12 Page





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