ST2601B datasheet(21/35 Pages) SITRONIX

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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

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

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

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