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SM5221-002 Datasheet(PDF) 7 Page - SamHop Microelectronics Corp. |
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SM5221-002 Datasheet(HTML) 7 Page - SamHop Microelectronics Corp. |
7 / 16 page (3) Custom Code The DOUT output custom code can be set in any of 65536 ways by means of the diodes attached to the CODE (Custom Code Select) pin and the KI/O pins and the pull-up resistors attached to the KI/O pins. When a code other than code 00000000 (no diode connection) is used. (4) Custom Code Mask ROM Specification The custom code can also be set by mask ROM. When the mask ROM specification is used the custom code can be set without the connection of external diodes and resistors, and by combining external diodes and resistors with mask ROM it is possible to output a code with different contents from those set by the mask ROM. When mask ROM specification is used, (Ver. I) or (Ver. II) can be selected. * Standard product SM5221-001/002 uses the Ver. I specification Internal ROM is set as follows: Page 7 * Standard product SM5221-002 uses the Ver. II specification. V.2.0 Mar 8,2002 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 C0 C1 C2 C3 C4 C5 C6 C7 C0 C1 C2 C3 C4 C5 C6 C7 ROM 1 Custom code high-order 8 bits ROM 2 Custom code' low-order 8 bits Ver. II C0, C1, C2: Determined by wiring one of pins KI/O0 thru KI/O7 to CCS pin. C3 thru C7: Determined by internal ROM3 and absence/presence of KI/O6 & KI/O7 external pull-up resistors. Determined by logical OR of internal ROM2 and external pull-up resistor (KI/O0 thru KI/O5) positions. Ver. I Custom Code' Low-Order 8 Bits Determined by logical OR of internal ROM1 and external diode positions. Determined by logical OR of interanl ROM2 and external pull-up resistor positions Custom Code High-Order 8 Bits SM5221-001/002 32 KEYS ENCODER SAMHOP Microelectronics Corp. 三合微科股份有限公司 |
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