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PDF SM5907AF Data sheet ( Hoja de datos )
| Número de pieza | SM5907AF | |
| Descripción | compression and non compression type shock-proof memory controller | |
| Fabricantes | Nippon Precision Circuits Inc | |
| Logotipo |  |
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NIPPON PRECISION CIRCUITS INC.
SM5907AF
compression and non compression type
shock-proof memory controller
Overview
The SM5907AF is a compression and non com-
pression type shock-proof memory controller LSI for
compact disc players. The compression level can
be set in 4 levels, and external memory can be
selected from 4 options (4M, 4M× 2, 16M, 16M× 2).
It operates from a 2.4 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 3 × speed input rate)
- System clock input
⋅ 384fs (16.9344 MHz)
- Shock-proof memory controller
⋅ ADPCM compression method
⋅ 4-level compression mode selectable
4-bit compression mode 2.78 s/Mbit
5-bit compression mode 2.22 s/Mbit
6-bit compression mode 1.85 s/Mbit
Full-bit non compression mode 0.74 s/Mbit
⋅ 4 external DRAM configurations selectable
1 or 2 × 16M DRAM (4M × 4 bits, refresh
cycle = 2048 cycle)
1 or 2 × 4M DRAM (1M × 4 bits)
- Microcontroller interface
⋅ Serial command write and status read-out
⋅ Data residual detector:
15-bit operation, 16-bit output
⋅ Forced mute
- Extension I/O
Microcontroller interface for external control
using 5 extension I/O pins
- +2.4 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
- 44-pin QFP package (0.8 mm pin pitch)
Ordering Information
SM5907AF 44-pin QFP
NIPPON PRECISION CIRCUITS-1
1 page  
SM5907AF
Low-voltage:(VDD1 = VDD2 = 2.4 to 3.0 V, VSS = 0 V, Ta = - 20 to 70 ˚C)
Parameter
Current consumption
Input voltage
Output voltage
Input current
Input leakage current
Pin Symbol
VDD
IDD
CLK
(*2,3,4)
(*4,5)
CLK
(*3,4)
(*2,3,4)
(*2)
H level
VIH1
L level
VIL1
VINAC
H level
VIH2
L level
VIL2
H level
VOH1
L level
VOL1
IIH1
IIL1
IIL2
ILH
ILL
Condition
(*B)SHPRF ON
(*B)Through mode
Min
0.7VDD
Rating
Typ
4.5
1.8
AC coupling
1.0
0.7VDD
IOH = - 0.5 mA
IOL = 0.5 mA
VIN = VDD
VIN = 0V
VIN = 0V
VIN = VDD
VIN = 0V
VDD - 0.4
5
5
1
25
25
4
(*B) VDD1 = VDD2 = 3 V, CLK input frequency fXTI= 384fs = 16.9344 MHz, all outputs unloaded,
SHPRF: Shock-proof,
typical values are for VDD1 = VDD2 = 3 V.
Max
8.0
3.0
0.3VDD
0.3VDD
0.4
115
115
15
1.0
1.0
Unit
mA
mA
V
V
VP-P
V
V
V
V
µA
µA
µA
µA
µA
<Pin summary>
(*1) Pin function
Pin name
(*2) Pin function
Pin name
(*3) Pin function
Pin name
(*4) Pin function
Pin name
(*5) Pin function
Pin name
Clock input pin (AC input)
CLK
Schmitt input pins
YSRDATA, YLRCK, YSCK, YFLAG, YFCLK, NRESET,
YBLKCK, YDMUTE, YMLD, YMDATA, YMCLK
Schmitt input pin with pull-up
NTEST
I/O pins (Schmitt input with pull-up in input state)
UC1, UC2, UC3, UC4, UC5, D0, D1, D2, D3
Outputs
ZSCK, ZLRCK, ZSRDATA, ZSENSE, NCAS, NCAS2, NCAS3,
NWE, NRAS, A0, A1, A2, A3, A4, A5, A6, A7, A8, A9, A10
NIPPON PRECISION CIRCUITS-5
5 Page 
SM5907AF
Functional description
SM5907AF has two modes of operation; shock- The operating sequences are controlled using com-
proof mode and through mode.
mands from a microcontroller.
Microcontroller interface
Command format
Commands from the microcontroller are input using
3-wire serial interface inputs; data (YMDATA), bit
clock (YMCLK) and load signal (YMLD).
In the case of a read command from the microcon-
troller, bit serial data is output (ZSENSE) synchro-
nized to the bit clock input (YMCLK).
Write command format (Commands 80 to 85)
YMDATA
DATA 8bit
COMMAND 8bit
D7 D6 D5 D4 D3 D2 D1 D0 B7 B6 B5 B4 B3 B2 B1 B0
YMCLK
YMLD
Read command format (Commands 90, 91, 93)
YMDATA
COMMAND 8bit
B7 B6 B5 B4 B3 B2 B1 B0
YMCLK
YMLD
ZSENSE
STATUS 8bit
S7 S6 S5 S4 S3 S2 S1 S0
Read command format (Command 92 (memory residual read))
YMDATA
COMMAND 8bit
B7 B6 B5 B4 B3 B2 B1 B0
YMCLK
YMLD
ZSENSE
S7 S6
RESIDUAL DATA 16bit
S1 S0 M1 M2
M7 M8
NIPPON PRECISION CIRCUITS-11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet SM5907AF.PDF ] | |
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