SC9256 Ver la hoja de datos (PDF) - Silan Microelectronics
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Fabricante
SC9256 Datasheet PDF : 24 Pages
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Silan
Semiconductors
SC9256
FUNCTION DESCRIPTION
Serial I/O ports
As the block diagram shows, the functions are controlled by setting data in the 48 bits contained in each of the 2
sets of 24 bit registers. Each bit of data in these register is transferred through the serial ports between the
controller and the DATA, CLOCK and PERIOD pins. Each serial transfer consists of a total of 32 bits, with 8
address bits and 24 data bits.
Since all functions are controlled in units of registers, the explanation in this manual focuses on the 8 bit address
and functions of each register.
These registers consist of 24 bits and are selected by an 8 bit address.
A list of the address assignment for each register is given below under register assignments.
Register
Input
register 1
Input
register 2
Output
register 1
Output
register 2
Address
D0H
D2H
D1H
D3H
Contents of 24 bits
PLL divisor setting
Reference frequency setting
PLL input and mode setting
Crystal oscillator selection
General=purpose counter control (including lock detection bit
control)
I/O port and general-purpose counter switching bits
I/O-5/CLK pin switching bit
DO pin control
Test bit
I/O port control (also used as general-purpose counter input
selection bits)
Output data
General-purpose counter numeric data
Not used
Lock detection data
I/O port control data
Output data
Input data (undefined during output port selection)
Not used
No. of bit
16
4
2
2
total 24
4
3
1
1
1
5
9
total 24
22
2
total 24
5
5
4
5
5
total 24
When the PERIOD signal falls, the input data are latched in register 1 or register 2 and the function is performed.
When the CLOCK signal falls for 9 time, the output data are latched in parallel in the output registers. The data
are subsequently output serially from the data pin.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
REV: 1.0
6
2002.01.30.
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