st2064b Sitronix Technology Corporation, st2064b Datasheet - Page 53

• Manufacturer Part Number: st2064b
• Description: 8 Bit Microcontroller With 64k Bytes Rom
• Manufacturer: Sitronix Technology Corporation

Ver. 3.0
Project name
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12 Make sure timer counting correct﹒
13 Make sure temperature counting correct﹒
14 Make sure software key de-bounce work﹒（ 10 ~ 50 mS）
15 Make sure stack memory will not overflow﹒
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17 Please use same parts when developing and producing﹒
18 Please select general parts for production.
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28 After Power on ,enter wait 0 mode 0.5s before normal operation
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1 After power on， initial user RAM and confirm control register﹒
2 Confirm LCD panel’ s V
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5 Make sure power down mode work﹒
6 Calculate average operating current﹒（ Wake up time ratio）
7 Confirm I/O directions and set pull-up for un-used input pins﹒
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Confirm the difference between E.V. Board and real chip（ ex.
V
Before entry power down mode， turn off un-used peripheral.
（ LCD driver、 PSG、 OSC or OSCX）
For input mode with pull-up function， Please set bit 7 of port
condition control register（ PMCR[7]） and each bit of port
data register﹒
If use I/O for pin option， please re-configure I/O status after
reading﹒（ directions and pull-up resistor）
Pay attention to“ bit instructions” ， because some registers
have different function for read and write acting. ex. PA、 PB、
PRS、 SYS and control register for write only﹒
Disable un-used function’ s control register and put“ RTI”
Instruction at un-used interrupt vector﹒
Under test mode， every functions / parts must be tested﹒ ex.
LCD、 LED、 speaker / buzzer、 key、 motor and senser… etc.
When testing， write every unusual situation down and find
out the reasons indeed.
Make sure the program accept un-normal operatings and
system will not hold or crash down﹒
When you set I/O port as input mode， please make sure
signal level stable before reading﹒ ex. When key scan， please
delay 12 uS then get key code﹒
If Port-A want to be read or set to output, Dynamic I/O function must
be disabled(PAK[7:0]=0) and wait 12 uS to stable.
LCD frame rate, voltage pump control(LCK[3~0]) & duty / bias
selection(LSEL[7~5]) can’ t be modified while LCD turn on.
Make sure resister of R-OSC on EV-Chip matches desired
frequency and equals the crytal on EV-Board.
If LCD clock source is from R-OSC, LCD will have no clock in WAI1
and can’ t display.
Use LCD-EV chip to check LCD display quality. If there is crosstalk
on the first line, please turn on keyboard-scan function for better
quality.
Always disable interrupt function(by an “ SEI ” instruction) when
modify the IENAL,IENAH,IREQL and IREQH register
OP
、 driving ability、 F
Should be Checked
OSC
OP
（ contrast level）、 Duty and Bias﹒
、 power consumption、 noise… etc.）
53/57
Check
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Note
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ST2064B
5/8/09