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ST2601B 데이터시트(PDF) 21 Page - Sitronix Technology Co., Ltd. |
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ST2601B 데이터시트(HTML) 21 Page - Sitronix Technology Co., Ltd. |
21 / 35 page ST2601B 21/35 Project Name DATE: ITEM CHECK NOTE 1. Make sure the resistor of R-OSC matches the desired frequency and VCC 2. Make sure the referenced data sheet is the most updated version 3. After power on, enter wait-1 mode for0.5 second before normal operation 4. Initialize user RAM and every related control register 5. Confirm Vlcd level, duty, bias, frame rate, alternating rate and the display quality of LCD 6. Make sure to set LCKR=00h before turning off LCD function 7. Make sure to implement a mechanism to fine-tune LCD contrast level. The mechanism could be pin-option or keying-adjustment. 8. Confirm PSG output mode: Current DAC or one of three PWM modes 9. Before entering power down mode, turn off unused peripheral such as LCD controller, PSG, Current DAC and LVD 10. Confirm I/O direction, default state and function-enable bits. Enable pull-up for unused input pins 11. Read from an input port after the signals are stable. Ex. when doing key scan, delay 12 us from a new scan value then read the return lines. 12. If an input connects to VCC or GND directly, make sure to remove any DC current from internal pull-up/down resistor after the status is read. 13. Do not use “read-modify-write”instructions, e.g. ROR and SMB0, to the registers that are read-only, write-only or have different functions for read and write. The registers at least include PA ~ PF, PL, PCL, PSGxA, PSGxB, TxCH, TxCL, PRS, BTSR, BTC, MULL, MULH, MISC, SYS, IREQL, IREQH, LSSAL, LSSAH, LVPW, LCKR, LFRA, LPAL, SDATAH, SDATAL, SSR, DMSL, DMSH, DMDL, DMDH, DCNTL, DCNTH, LVCTR, UDATA and USR. 14. Disable unused functions and reserve “RTI”instruction for unused interrupt vectors 15. Always disable interrupt function (by an ‘SEI’instruction) when modifying the IENAL, IENAH, IREQL and IREQH registers. 16. Check stack memory is limited within 256 bytes. 17. Design a test mode to check every possible function 18. Follow the standard operation flow of using LCDCK=32KHz. 19. Use ST2600B (enable ST2602B EV mode), to develop the whole system., and verify every functions, especially sound quality and LCD performance. 20. RC-type OSC has inter-sample variation. For frequency-sensitive application (for example:IR communication and speech sampling rate), please use 32KHz_OSC to calibrate RC-type OSC by firmware 21. Fill up ROM until there has no empty place. (total 131072 bytes) Engineer Manager |
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