18 UART
S1C17001 TECHNICAL MANUAL
EPSON
231
18.10 Precautions
• Change the UART settings only while transfers are blocked (RXEN = 0).
∗
RXEN
: UART Enable Bit in the UART Control (UART_CTL) Register (D0/0x4104)
• Do not set RXEN to 0 while the UART is transmitting or receiving data.
• The UART transfer rate is capped at 460,800 bps (115,200 bps in IrDA mode). Do not set faster transfer rates.
• Preventing transfer by setting RXEN to 0 clears (initializes) transfer data buffers. Before writing 0 to RXEN,
confirm the absence of data in the buffers awaiting transmission or reading.
• The IrDA receive detection clock must be selected as a clock faster than the 8-bit timer or transfer clock sclk in-
put via the SCLK pin.
• The IrDA interface demodulation circuit treats Low pulses with a width of at least 2 IrDA receive detection clock
cycles as valid. Select the appropriate prescaler output clock to enable detection of input pulses with a minimum
width of 1.41
μ
s as a 2 IrDA receive detection clock.
Summary of Contents for S1C17001
Page 1: ...Technical Manual S1C17001 CMOS 16 BIT SINGLE CHIP MICROCONTROLLER ...
Page 33: ...4 POWER SUPPLY VOLTAGE 24 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 63: ...6 INITERRUPT CONTROLLER 54 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 87: ...8 CLOCK GENERATOR CLG 78 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 91: ...9 PRESCALER PSC 82 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 133: ...11 16 BIT TIMER T16 124 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 211: ...16 STOPWATCH TIMER SWT 202 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 219: ...17 WATCHDOG TIMER WDT 210 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 241: ...18 UART 232 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 277: ...20 I2 C 268 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...
Page 313: ...25 PACKAGE 304 EPSON S1C17001 TECHNICAL MANUAL This page intentionally left blank ...