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SN74HC590ADW 数据表(PDF) 2 Page - Texas Instruments |
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SN74HC590ADW 数据表(HTML) 2 Page - Texas Instruments |
2 / 21 page SN54HC590A, SN74HC590A 8BIT BINARY COUNTERS WITH 3STATE OUTPUT REGISTERS SCLS039F − DECEMBER 1982 − REVISED SEPTEMBER 2003 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing diagram RCO QA−QH CCKEN CCLR OE CCLK COUNTER (internal) RCLK Hex 01 Hex 02 Hex 03 Hex 04 Hex 05 Hex FD Hex FE Hex FF Hex 00 Hex01 Hex 00 Hex 01 Hi-Z Hex 01 Hex 05 Hex 00 TIMING SEQUENCE 1. Clear Counter (asynchronous). 2. Count up: 0x01. Store 0x00 in register. 3. Inhibit counter clock (CCKEN = HIGH). Store 0x01 in register. 4. Count 0x02, 0x03. 5. 3-state the outputs 6. Count up: 0x04 7. Enable outputs. 8. Continue up: 0x05 9. Store 0x05 in register. 10. Continue counting: 0x06...0xFD, 0xFE, 0xFF, 0x00, etc. 11. Store 0x00 in register. Don’t Care Hex 00 Don’t Care |
类似零件编号 - SN74HC590ADW |
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类似说明 - SN74HC590ADW |
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