13-2
Seiko Epson Corporation
S1C31D50 TECHNICAL MANUAL
(Rev. 1.00)
Figure 13.1.1 shows the UART3 configuration.
Table 13.1.1 UART3 Channel Configuration of S1C31D50
Item
S1C31D50
Number of channels
3 channels (Ch.0 to Ch.2)
Figure 13.1.1 UART3 Configuration
13.2.
Input/Output Pins and External Connections
13.2.1.
List of Input/Output Pins
Table 13.2.1.1 lists the UART3 pins.
Table 13.2.1.1 List of UART3 Pins
Pin name
I/O
*
Initial status
*
Function
USIN
n
I
I (Hi-Z)
UART3 Ch.
n
data input pin
USOUT
n
O
O (High)
UART3 Ch.
n
data output pin
* Indicates the status when the pin is configured for the UART3.
If the port is shared with the UART3 pin and other functions, the UART3 input/output function must be
assigned to the port before activating the UART3. F
or more information, refer to the “I/O Ports” chapte
r.
DMA request
control circuit
DMA controller
RB1FDMAEN
x
TBEDMAEN
x
Interrupt
control circuit
TENDIE
FEIE
PEIE
OEIE
RB2FIE
RB1FIE
TBEIE
TENDIF
FEIF
PEIF
OEIF
RB2FIF
RB1FIF
TBEIF
CLKSRC[1:0]
CLKDIV[1:0]
Baud rate
generator
Transmit/receive
control circuit
Clock generator
Interrupt
controller
DBRUN
MODEN
Shift register
RZI demodulator
Transmit data
buffer
TXD[7:0]
Shift register
RZI modulator
Carrier modulator
PUEN
STPB
OUTMD
IRMD
INVTX
INVRX
SFTRST
RBSY
TBSY
PRMD
PREN
CHLN
FMD[3:0]
BRT[7:0]
BRDIV
PECAR
CAREN
CRPER[7:0]
CLK_UART3_n
In
te
rn
al
da
ta
bu
s
UART3 Ch.
n
USINn
USOUTn
Receive data buffer
RXD[7:0]
Summary of Contents for S1C31D50
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