sc9821c Silan, sc9821c Datasheet - Page 5

• Manufacturer Part Number: sc9821c
• Description: Cd Electronic Shockproof Controller
• Manufacturer: Silan

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FUNCTION DESCRIPTION
1.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http:
Pin No.
SC9821C communicates with MCU through synchronism serial bus (SSI) data interface of SILAN Company.
1.1 Interface to main control MCU
1.1.1 Serial interface signal form
signal sequence is as followed:
long as the wave is not distortion), and is independent of Guest port; DataAvail used for marking effective data
time is also sent by host computer and it is a low active; Data is a bidirectional signal with pull-up resistor and
used for specific data communication and feedback. As above picture, the data sent by the host port is all at
the falling edge of SsiSClk and the feedback data or Ack signal of guest port are at the rising edge. We define
one transmitting process as a frame, and the specification of the coherent signals are as follows:
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
INTERFACE FUNCTION
The serial interface communicating with MCU has 3 signal lines including control signal, data signal, and the
Where, SsiSClk is the clock generating from Host port, and the frequency can fluctuate in a wide range (as
www.silan.com.cn
VDD3.3
XALTI
XALTO
NotExtAsyncReset
TestMode
VSS
VDD1.8
SsiSClk
Data
DataAvail
YFCLK
YBLKCK
YFLAG
InterruptToMcu
Addr<0>
Addr<1>
Addr<2>
Addr<3>
Pin name
I/O
I/O
O
O
O
O
O
O
I
I
I
I
I
I
I
I
I
I
I
Power supply for chip ports (3.3V)
Crystal oscillator input pin
Crystal oscillator output pin
System reset pin which is low active
Test mode configuration pin (high active, connect to the ground
when the chip is not in test mode).
Ground.
Power supply for chip kernel. (1.8V)
Clock input pin of MCU interface
Data pin of MCU interface
Communication control pin of MCU interface
Sub code frame sync signal
Sub code block sync signal
CD servo error flag
Interrupt signal output to MCU, and high active
SDRAM/DRAM address pin 0
SDRAM/DRAM address pin 1
SDRAM/DRAM address pin 2
SDRAM/DRAM address pin 3
Pin descriptions
REV:1.0
SC9821C
Page 5 of 18
2006.07.21