FX802 Datasheet, PDF (4/14 Pages) Sanyo Semicon Device – DC-DC Converter

External Components
V_DD
C₅
V_SS
RAS2
R₁
RAS1
WE
XTAL
See INSET _XTAL/CLOCK
IRQ
SERIAL CLOCK
COMMAND DATA
1§
28
2
27
3
26
4§
§ 25
5
§ 24
6
23
7
22
8 FX802J 21
CS
9
20
REPLY DATA
10
19
V_BIAS
11
18
AUDIO OUT ₁₂
17
AUDIO IN ₁₃
C ₄ ^C6
14
16
15
V_SS
C₁
V_SS
V_DD
CAS
A9
RAS3
RAS4
A8
A7
A6
A5
A4
A3/ECK
A2/DCK
A1/DEI
A0/ENO
INSET
XTAL
4§
X
R
2
1
FX802J
5
XTAL/CLOCK
C3
C2
V_SS
Component
R=
1
R
2
R
3
C
1
C
2
C₃
Fig.2 Recommended Component and DRAM Connections
Value
22.0kΩ
1.0MΩ
1.0kΩ
1.0µF
33.0pF
33.0pF
4 x 1Mbit
DRAM
A0 – A9
WE
CAS
RAS
D
Q
A0 – A9
WE
CAS
RAS
D
Q
A0 – A9
WE
CAS
RAS
D
Q
A0 – A9
WE
CAS
RAS
D
Q
R₃
C=
4
1.0µF
C₅
1.0µF
C
1.0nF
6
X₁
4.00MHz
or 4.032MHz
or 4.096MHz
Tolerance: R = ±10% C = ±20%
Notes
1. Xtal circuitry shown INSET is in accordance with CML
Application Note D/XT/2 December 1991.
2. External Xtal circuitry is not applicable to the 24-pin/lead
versions of this device, only a clock pulse input can be
used.
3. Functions whose pins are marked § above are not
available on the 24-pin/lead versions of this device. Pin
numbers illustrated are for 28-pin versions.
4. Table 3 details the actual encoder/decoder sample rates
available using the Xtal frequencies recommended above.
5. R₁ is used as the DBS 800 system common-pullup for the
“C-BUS” Interrupt Request (IRQ) line, the optimum value
will depend upon the circuitry connected to the IRQ line.
Up to 8 peripherals may be connected to this line.
6. Recommended DRAM Parameters:
256kbit x 1 or 1Mbit x 1 Dynamic Random Access Memory
with ‘CAS before RAS’ refresh mode, maximum Row
Address Access time = 200nsec.
Example DRAM types:
256kbit (262,144bits)
Texas Instruments
Hitachi
1Mbit (1,048,576bits)
Texas Instruments
Hitachi
TMS4256–20
HM51256–15
TMX4C1024–15
HM511000–15
7. Figure 2 (above) shows connections to 4 x 1Mbit sections
of DRAM. If desired, to simplify PCB layout, the DRAM
inputs A0 to A8 may be connected in any order to the
FX802 DVSR Codec output pins A0 to A8. Connections to
256kbit DRAM are similar, but A9 unconnected.
8. When using the FX802 “stand-alone (Direct Access),” no
DRAM should be connected.
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