ML63611 User’s Manual
Chapter 12 Serial Port (SIO)
12 – 15
OPTION B (D): 1.5 V (3.0 V), With regulator
circuit for LCD bias
OPTION A (C): 1.5 V (3.0 V), Without regulator
circuit for LCD bias
(2) Synchronous internal clock mode
The synchronous internal clock mode is selected by setting STMOD (bit 0 of STCON0) to “1”, and STCLK
(bit 0 of STCON1) to “1”.
Figure 12-6 is the send timing chart for the synchronous internal clock mode.
The synchronous internal clock send procedure is described below.
First the send format (data bit length, parity bit, etc.) is set to STCON0 and STCON1.
①
Set send data to STBUFL/H.
②
The send data is transferred from STBUFL/H to the send register, and send operation begins. At the
same time the interrupt request signal (STINT) is generated.
③
Check that BFULL = “0”, then set the next send data to STBUFL/H.
④
When the send operation is complete, the send data set to STBUFL/H is transferred to the send register,
and the send operation begins. At the same time, the serial port send interrupt signal (STINT) is
generated.
Repeat step
③
the required number of times.
In the synchronous internal clock mode the send baud rate is fixed at the crystal oscillation frequency, that is,
the frequency (32.768 kHz) of the time base clock (TBCCLK).
After data is set to STBUFH, the send clock (TXCO) generates between 2 and 3.5 clocks of the TBCCLK
source, and a send operation starts.
Содержание ML63611
Страница 9: ...Chapter 1 Overview...
Страница 33: ...Chapter 2 CPU and Memory Spaces...
Страница 42: ...Chapter 3 CPU Control Functions...
Страница 49: ...Chapter 4 Interrupt INT...
Страница 62: ...Chapter 5 Clock Generator Circuit OSC...
Страница 71: ...Chapter 6 Time Base Counter TBC...
Страница 75: ...Chapter 7 Timers TIMER...
Страница 99: ...Chapter 8 100 Hz Timer Counter 100HzTC...
Страница 103: ...Chapter 9 Watchdog Timer WDT...
Страница 108: ...Chapter 10 Ports INPUT I O PORT...
Страница 140: ...Chapter 11 Melody Driver MELODY...
Страница 152: ...Chapter 12 Serial Port SIO...
Страница 179: ...Chapter 13 LCD Driver LCD...
Страница 200: ...Chapter 14 Battery Low Detect Circuit BLD...
Страница 204: ...Chapter 15 Power Supply Circuit POWER...
Страница 215: ...Chapter 16 A D Converter ADC...
Страница 238: ...Appendixes...
Страница 271: ...ML63611 User s Manual First Edition May 2001 Second Edition June 2001 2001 Oki Electric Industry Co Ltd PEUL63611 02...