SM5906AF
NIPPON PRECISION CIRCUITS INC.
Shock-proof Memory Controller for Video CD Players
Overview
The SM5906AF is a shock-proof memory controller
LSI for video CD players. The operating mode can
be set to CD-DA mode, V-CD mode, or Super V-CD
mode, and external memory can be selected from 2
options (4M, 16M). It operates from a 2.7 to 3.6 V
supply voltage range.
Features
– 2-channel processing
– Serial data input
•
2s complement, 16-bit/MSB first
•
Right-justified format
•
Wide capture function
(up to 4
×
speed input rate)
•
Selectable 16/24/32-bit clock
– System clock input
•
384fs (16.9344 MHz)
– Shock-proof memory controller
•
Selectable CD-DA/V-CD/SVC mode
•
2 external DRAM configurations selectable
1
×
16M DRAM (4M
×
4 bits, refresh cycle =
2048 cycle)
1
×
4M DRAM (1M
×
4 bits)
– Microcontroller interface
•
Serial command write and status read-out
•
Data residual detector:
11-bit operation, 16-bit output
(Bits 13 to 15 bit are fixed LOW.)
•
Forced mute
– Extension I/O
Microcontroller interface for external control
using 3 extension I/O pins
– +2.7 to +3.6 V operating voltage range
– Schmitt inputs
All input pins (including I/O pins) except CLK
(system clock)
– Reset signal noise elimination
Approximately 3.8
µs
or longer (65 system
clock pulses) continuous LOW-level reset
- 48-pin QFP package (0.5 mm pin pitch)
Pinout
(Top View)
YMCLK
27
YMDATA
26
NCAS
36
35
34
33
32
31
30
29
28
NRAS
NWE
VSS3
A10
D1
D0
D3
D2
Ordering Information
SM5906AF
48pin QFP
VDD4
A9
A8
A7
A6
A5
A4
A0
A1
A2
A3
VSS4
25
VDD3
24
23
22
21
37
38
39
40
41
42
43
44
45
46
47
48
10
11
12
1
2
3
4
5
6
7
8
9
VSS2
YMLD
YDMUTE
ZSENSE
NRESET
YBLKCK
YFLAG
ZC2PO
ZSRDATA
ZSCK
ZLRCK
VDD2
SM5906AF
JAPAN
20
19
18
17
16
15
14
13
YSRDATA
VDD1
YLRCK
NTEST1
TEST2
NIPPON PRECISION CIRCUITS-1
YC2PO
YSCK
VSS1
UC1
UC2
UC3
CLK
NPC [ NIPPON PRECISION CIRCUITS INC ]
