Silan
Semiconductors
2) Code Word
SC5260
A group of Code Bits is called a Code Word. A Code Word consists of 12 AD bits followed by one Sync Bit. The
12 AD bits are determined by the corresponding states of A0~A7, A8/D3, A9/D2, D1 and D0 pins at the time of
transmission. When the Data Type of SC5260 is used, the address bits will decrease accordingly.
For example: In the 4-Data Type where the address has eight (8) bits, the transmitting format is:
8 Address Bits
4 Data Bits
Sync. Bit
SC5260 has a maximum of ten (10) Address Bits. The following diagram shows the code bits with their
corresponding pins.
First Bit Transmitted
A0
A1
A2
A3
A4
A5
A6
A7
A8/
D3
A9/
D2
D1
D0
SYNC BIT
One Complete Code Word
2 Data:
4 Data:
A0
A0
A1
A1
A2
A2
A3
A3
A4
A4
A5
A5
A6
A6
A7
A7
A8
D3
A9
D2
D1
D1
D0
D0
Sync Bit
Sync Bit
The Code Bits A0~A7, A8/D3, A9/D2, D1 and D0 are determined by the states set at these pins. For example,
when the A0 (Pin No.1) is set to “1” (VCC), the Code Bit A0 is synthesized as “1” bit. In the same manner, when it
(A0 Pin) is set to “0” (VSS) or left floating, the Code Bit A0 is synthesized as a “0” or “f” bit respectively.
When SC5260 detects “1” on any of the Data Pins, it outputs a Code Word at DOUT. If the Data Pin is still in
high state (“1”) the time the Code Word transmission ends, SC5260 outputs the same Code Word. Please refer
to the diagram below:
DATA PIN
1 Code Word
1 Code Word 1 Code Word 1 Code Word
DOUT
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0
2000.12.31
5
SILAN [ SILAN MICROELECTRONICS JOINT-STOCK ]
