ST2601B
<System clock switching from OSC to OSCX>
Cause warm-up time is different when OSC is RC-OSC or X’tal.
To make sure the system clock has switched to OSCX, or error will happen.
Sample code, please follow up…
LDA
ORA
STA
NOP
NOP
NOP
SYS
#80H
SYS
;switch OSC to OSCX
BBR7 SYS,$ ; branch self until OSC is changed to OSCX
<Measure RC-OSC system clock>
Since programmer wants to measure the system clock when using RC-OSC, please follow up.
Please connect a 3K-Ohm resistor between Vdd and XIO. You can get a periodic signal output from the XIO
pin. It's RC osc signal.
<IrDA mode application note>
Since IrDA has strictly protocol when transmit/receive data.
We suggest programmers use X’tal to be system clock instead of RC-OSC if IrDA signals are needed.
Programmer can use ceramic-OSC to gain some profit since it’s cheaper than X’tal.
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SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
