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4 PERIPHERAL CIRCUITS
S1C33210 PRODUCT PART EPSON A-25
NameAddressRegister name Bit Function Setting Init. R/W Remarks
TXEN2
RXEN2
EPR2
PMD2
STPB2
SSCK2
SMD21
SMD20
D7
D6
D5
D4
D3
D2
D1
D0
Ch.2 transmit enable
Ch.2 receive enable
Ch.2 parity enable
Ch.2 parity mode selection
Ch.2 stop bit selection
Ch.2 input clock selection
Ch.2 transfer mode selection
1
1
0
0
1
0
1
0
SMD2[1:0] Transfer mode
8-bit asynchronous
7-bit asynchronous
Clock sync. Slave
Clock sync. Master
0
0
X
X
X
X
X
X
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Valid only in
asynchronous mode.
00401F3
(B)
Serial I/F Ch.2
control register
1 Enabled 0 Disabled
1 Enabled 0 Disabled
1 With parity 0 No parity
1 Odd 0 Even
1 2 bits 0 1 bit
1 #SCLK2 0
Internal clock
–
DIVMD2
IRTL2
IRRL2
IRMD21
IRMD20
D7–5
D4
D3
D2
D1
D0
reserved
Ch.2 async. clock division ratio
Ch.2 IrDA I/F output logic inversion
Ch.2 IrDA I/F input logic inversion
Ch.2 interface mode selection
1
1
0
0
1
0
1
0
IRMD2[1:0]
–
I/F mode
reserved
IrDA 1.0
reserved
General I/F
–
X
X
X
X
X
–
R/W
R/W
R/W
R/W
0 when being read.
Valid only in
asynchronous mode.
00401F4
(B)
1 1/8 0 1/16
1 Inverted 0 Direct
1 Inverted 0 Direct
Serial I/F Ch.2
IrDA register
0x0 to 0xFF(0x7F)TXD37
TXD36
TXD35
TXD34
TXD33
TXD32
TXD31
TXD30
D7
D6
D5
D4
D3
D2
D1
D0
Serial I/F Ch.3 transmit data
TXD37(36) = MSB
TXD30 = LSB
X
X
X
X
X
X
X
X
R/W00401F5
(B)
Serial I/F Ch.3
transmit data
register
0x0 to 0xFF(0x7F)RXD37
RXD36
RXD35
RXD34
RXD33
RXD32
RXD31
RXD30
D7
D6
D5
D4
D3
D2
D1
D0
Serial I/F Ch.3 receive data
RXD37(36) = MSB
RXD30 = LSB
X
X
X
X
X
X
X
X
R00401F6
(B)
Serial I/F Ch.3
receive data
register
–
TEND3
FER3
PER3
OER3
TDBE3
RDBF3
D7–6
D5
D4
D3
D2
D1
D0
reserved
Ch.3 transmit-completion flag
Ch.3 flaming error flag
Ch.3 parity error flag
Ch.3 overrun error flag
Ch.3 transmit data buffer empty
Ch.3 receive data buffer full
–
0
0
0
0
1
0
–
R
R/W
R/W
R/W
R
R
0 when being read.
Reset by writing 0.
Reset by writing 0.
Reset by writing 0.
00401F7
(B)
–
1 Error 0 Normal
1
Transmitting
0 End
1 Error 0 Normal
1 Error 0 Normal
1 Empty 0 Buffer full
1 Buffer full 0 Empty
Serial I/F Ch.3
status register
TXEN3
RXEN3
EPR3
PMD3
STPB3
SSCK3
SMD31
SMD30
D7
D6
D5
D4
D3
D2
D1
D0
Ch.3 transmit enable
Ch.3 receive enable
Ch.3 parity enable
Ch.3 parity mode selection
Ch.3 stop bit selection
Ch.3 input clock selection
Ch.3 transfer mode selection
1
1
1
0
SMD3[1:0] Transfer mode
8-bit asynchronous
7-bit asynchronous
0
0
X
X
X
X
X
X
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Always set to 0
Always set SMD31 to
1
00401F8
(B)
Serial I/F Ch.3
control register
1 Enabled 0 Disabled
1 Enabled 0 Disabled
1 With parity 0 No parity
1 Odd 0 Even
1 2 bits 0 1 bit
1 – 0
Internal clock
–
DIVMD3
IRTL3
IRRL3
IRMD31
IRMD30
D7–5
D4
D3
D2
D1
D0
reserved
Ch.3 async. clock division ratio
Ch.3 IrDA I/F output logic inversion
Ch.3 IrDA I/F input logic inversion
Ch.3 interface mode selection
1
1
0
0
1
0
1
0
IRMD3[1:0]
–
I/F mode
reserved
IrDA 1.0
reserved
General I/F
–
X
X
X
X
X
–
R/W
R/W
R/W
R/W
0 when being read.00401F9
(B)
1 1/8 0 1/16
1 Inverted 0 Direct
1 Inverted 0 Direct
Serial I/F Ch.3
IrDA register