lf4415 LOGIC Devices Inc., lf4415 Datasheet - Page 19

• Manufacturer Part Number: lf4415
• Description: Video Memory / Fifo
• Manufacturer: LOGIC Devices Inc.

Register 9
Detect & Use
Embedded TRS
Pre-amble
TRS Trigger
Control
Register A
Write/Read
Pointer Trigger
Control
LOGIC Devices Incorporated
Configuration Register Definitions
Register 9 [7:6] = TRS_DETECT[1:0] - Detect & Act on Embedded TRS EAV (a)
00
01
10
11
Register 9 [5] = TRS_TRIGGER _B - TRS Trigger Control, Chnl B (ONLY for DUAL-CHANNEL)
0
1
Register 9 [4] = TRS_TRIGGER - TRS Trigger Control, Chnl A
0
1
Register 9 [3:0] = Reserved [LOAD ‘0000’ IF MODIFYING REG 9]
Register A [7:6] = Reserved [LOAD ‘00’ IF MODIFYING REG A]
Register A [5:0] PTR_CNTRL - Individual W/R Pointer Trigger Control
fall within setup/hold spec to associated CLK) overrides memory address counter for exactly one clock
cycle, after which normal memory address incrementing immediately resumes.
address counter as long as it is held LOW. Memory address incrementing resumes when the pin is
returned HIGH.
same: WSET0 / WSET1 along with WCLR0 / WCLR0.
www.logicdevices.com
A [5] RSET
A [4] RCLR
A [3] BSET
A [2] BCLR
A [1] ASET
A [0] ACLR
Trigger Control bit = 0: Each falling edge on the corresponding control pin (control signal must still
Trigger Control bit = 1: The corresponding ‘active LOW’ control pin continuously overrides the memory
NOTE: In Single-Channel modes (MODE=x0xx), the following trigger control pairs must be set the
F-bit of embedded TRS EAV SETs current write pointer to value set by ADDR
F-bit of embedded TRS EAV CLEARs current write pointer. See Register 9[5:4].
disable auto-TRS sync detection (DEFAULT)
V-bit of embedded TRS EAV CLEARs current write pointer. See Register 9[5:4].
use only falling F-bit in EAV - FRAME SYNC; otherwise ignore (DEFAULT)
use only falling F/V bit in TRS - FRAME SYNC; otherwise ignore (DEFAULT)
use both rising and falling F/V bits in TRS
use both rising and falling F-bit in EAV - FIELD SYNC
0 = Falling edge triggered (DEFAULT ), 1 = Active LOW
0 = Falling edge triggered (DEFAULT ), 1 = Active LOW
0 = Falling edge triggered (DEFAULT ), 1 = Active LOW
0 = Falling edge triggered (DEFAULT ), 1 = Active LOW
0 = Falling edge triggered (DEFAULT ), 1 = Active LOW
0 = Falling edge triggered (DEFAULT ), 1 = Active LOW
19
PRELIMINARY
High Performance Memory Product
Video Memory / FIFO
January 23, 2008 LDS-44xx-A
FRAME
MEMORY
LF4460
LF4430
LF4415