
III PERIPHERAL BLOCK: SERIAL INTERFACE
S1C33T01 FUNCTION PART
EPSON
B-III-8-31
Table 8.1
Serial-Interface Pin Configuration (continue)
Name
Address
Register name
Bit
Function
Setting
Init.
R/W
Remarks
–
RSTX3
RSRX3
RSTX2
RSRX2
R8TU5
R8TU4
D7–6
D5
D4
D3
D2
D1
D0
reserved
SIF Ch.3 transmit buffer empty
SIF Ch.3 receive buffer full
SIF Ch.2 transmit buffer empty
SIF Ch.2 receive buffer full
8-bit timer 5 underflow
8-bit timer 4 underflow
–
0
–
R/W
0 when being read.
004029B
(B)
1 IDMA
request
0 Interrupt
request
8-bit timer 4-5
serial I/F Ch.2/3
IDMA request
register
–
DESTX3
DESRX3
DESTX2
DESRX2
DE8TU5
DE8TU4
D7–6
D5
D4
D3
D2
D1
D0
reserved
SIF Ch.3 transmit buffer empty
SIF Ch.3 receive buffer full
SIF Ch.2 transmit buffer empty
SIF Ch.2 receive buffer full
8-bit timer 5 underflow
8-bit timer 4 underflow
–
0
–
R/W
0 when being read.
004029C
(B)
1 IDMA
enabled
0 IDMA
disabled
8-bit timer 4-5
serial I/F Ch.2/3
IDMA enable
register
CFP07
CFP06
CFP05
CFP04
CFP03
CFP02
CFP01
CFP00
D7
D6
D5
D4
D3
D2
D1
D0
P07 function selection
P06 function selection
P05 function selection
P04 function selection
P03 function selection
P02 function selection
P01 function selection
P00 function selection
0
R/W
Extended functions
(0x402DF)
00402D0
(B)
1 #SRDY1
0 P07
1 #SCLK1
0 P06
1 SOUT1
0 P05
1 SIN1
0 P04
1 #SRDY0
0 P03
1 #SCLK0
0 P02
1 SOUT0
0 P01
1 SIN0
0 P00
P0 function
select register
CFEX7
CFEX6
CFEX5
CFEX4
CFEX3
CFEX2
CFEX1
CFEX0
D7
D6
D5
D4
D3
D2
D1
D0
P07 port extended function
P06 port extended function
P05 port extended function
P04 port extended function
P31 port extended function
P21 port extended function
P10, P11, P13 port extended
function
P12, P14 port extended function
0
1
R/W
00402DF
(B)
Port function
extension
register
1 #DMAEND3 0 P07, etc.
1 #DMAACK3 0 P06, etc.
1 #DMAEND2 0 P05, etc.
1 #DMAACK2 0 P04, etc.
1 #GARD
0 P31, etc.
1 #GAAS
0 P21, etc.
1 DST0
DST1
DPC0
0 P10, etc.
P11, etc.
P13, etc.
1 DST2
DCLK
0 P12, etc.
P14, etc.
CFP47
CFP46
CFP45
CFP44
CFP43
CFP42
CFP41
CFP40
D7
D6
D5
D4
D3
D2
D1
D0
P47 function selection
P46 function selection
P45 function selection
P44 function selection
P43 function selection
P42 function selection
P41 function selection
P40 function selection
0
R/W
0040300
(B)
1 #SRDY3
0 P47
1 #SCLK3
0 P46
1 SOUT3
0 P45
1 SIN3
0 P44
1 #SRDY2
0 P43
1 #SCLK2
0 P42
1 SOUT2
0 P41
1 SIN2
0 P40
P4 function
select register
CFP07–CFP00: P0[7:0] pin function selection (D[7:0]) / P0 function select register (0x402D0)
CFP47–CFP40: P4[7:0] pin function selection (D[7:0]) / P0 function select register (0x40300)
Selects the pins used for the serial interface.
Write "1": Serial-interface input/output pin
Write "0": I/O port pin
Read: Valid
The pins used for the serial interface are selected from P00 to P07 and P40 to P47 by writing "1" to CFP00 to CFP07
and CFP40 to CFP47. Pins P00 to P03 (SIN0, SOUT0, #SCLK0, and #SRDY0) are used for Ch. 0 and Pins P04 to
P07 (SIN1, SOUT1, #SCLK1, and #SRDY1) are used for Ch. 1. Pins P40 to P43 (SIN2, SOUT2, #SCLK2, and
#SRDY2) are used for Ch. 2 and Pins P44 to P47 (SIN3, SOUT3, #SCLK3, and #SRDY3) are used for Ch. 3. If "0"
is written, the corresponding pin functions as a shared function I/O port pin.
The necessary input/output pins differ depending on the transfer mode set (see Table 8.3).
At cold start, CFP is set to "0" (I/O port). At hot start, CFP retains its state from prior to the initial reset.