lf3338 LOGIC Devices Incorporated, lf3338 Datasheet - Page 9

• Manufacturer Part Number: lf3338
• Description: 8-bit Vertical Digital Image Filter
• Manufacturer: LOGIC Devices Incorporated

DEVICES INCORPORATED
significant bits (CF
the LF Interface
banks or configuration/control
registers (see Table 6). The nine least
significant bits (CF
for whatever is to be loaded (see
Tables 7 through 9). For example, to
load address 15 of the coefficient
banks, the first data value into the
LF Interface
load limit register 10, the first data
value should be E0AH. The first
address value should be loaded into
the interface on the same clock cycle
that latches the HIGH to LOW
transition of LD (see Figures 6 and 7).
The next value(s) loaded into the
interface are the data value(s) which
will be stored in the bank or register
defined by the address value. When
loading coefficient banks, the interface
will expect eight values to be loaded
into the device after the address value.
The eight values are coefficients 0
through 7. When loading configura-
tion or select registers, the interface
will expect one value after the address
value. When loading round or limit
registers, the interface will expect four
R = Reserved. Must be set to “0”.
* This bit represents the LSB of the Round Register.
** This bit represents the MSB of the Round Register.
1st Word - Address
2nd Word - Data
1st Word - Address
2nd Word - Data
3rd Word - Data
4th Word - Data
5th Word - Data
T
T
ABLE
ABLE
11. C
12. R
TM
should be 00FH. To
TM
ONFIGURATION
OUND
will load coefficient
11-9
8-0
) are the address
) determine if
CF
CF
R
R
R
R
R
0
0
1
11
11
EGISTER
CF
CF
R
R
R
R
R
0
0
0
10
10
EGISTER
L
OADING
values after the address value. Fig-
ures 6 and 7 show the data loading
sequences for the coefficient banks
and configuration/control registers.
PAUSE allows the user to effectively
slow the rate of data loading through
the LF Interface
HIGH, the LF Interface
PAUSE is returned to a LOW. Figures
8 through 11 display the effects of
PAUSE while leading coefficient and
control data.
Table 10 shows an example of
loading data into the coefficient
banks. The following data values
are written into address 10 of
coefficient banks 0 through 7: 210H,
543H, C76H, 9E3H, 701H, 832H,
F20H, 143H. Table 11 shows an
example of loading data into a
CF
CF
11 10 9 DESCRIPTION
0 0 0 Coefficient Banks
0 0 1 Configuration Registers
0 1 1 Select Registers
1 0 1 Round Registers
1 1 1 Limit Registers
R
R
R
R
1
0
1
T
9
9
ABLE
L
F
OADING
ORMAT
CF
CF
6. CF
R
R
R
R
0
0
0
8
8
F
ORMAT
TM
11-9
CF
CF
0**
0
0
0
1
1
1
. When PAUSE is
9
7
7
D
ECODE
TM
CF
CF
is held until
0
0
0
0
1
0
1
6
6
8-Bit Vertical Digital Image Filter
CF
CF
0
0
0
1
1
0
1
5
5
CF
CF
T
T
T
0
0
0
0
1
0
1
REGISTER
REGISTER
REGISTER
Video Imaging Products
4
4
ABLE
ABLE
ABLE
14
15
14
15
14
15
0
1
0
1
0
1
CF
CF
7. R
9. L
8. S
0
0
1
0
0
0
0
3
3
IMIT
ELECT
OUND
CF
CF
0
0
1
0
1
0
1
R
ADDRESS (HEX)
ADDRESS (HEX)
ADDRESS (HEX)
2
2
EGISTERS
R
R
EGISTERS
EGISTERS
04/06/1999–LDS.3338-B
A0E
A0F
E0E
E0F
A00
A01
60E
60F
E00
E01
600
601
CF
CF
1
1
0
1
0
1
1
1
1
LF3338
CF
CF
0*
0
1
0
0
1
0
0
0