Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Technical Manual page 374

III PERIPHERAL BLOCK: SERIAL INTERFACE
Register name Address Bit
P0 function 00402D0 D7
select register (B) D6
D5
D4
D3
D2
D1
D0
Port SIO 00402D7 D7–4
function D3
extension
register D2
D1
D0
Port SIO 00402DB D7–4
function D3
extension D2
register D1
D0
Port function 00402DF D7
extension (B) D6
register D5
D4
D3
D2
D1
D0
CFP07–CFP00: P0[7:0] pin function selection (D[7:0]) / P0 function select register (0x402D0)
Selects the pins used for the serial interface.
Write "1": Serial-interface input/output pin
Write "0": I/O port pin
Read: Valid
Select the pins used for the serial interface from among P00 through P07 by writing "1" to CFP00 through CFP07.
P00–P03 (SIN0, SOUT0, #SCLK0, #SRDY0) are used for channel 0; P04–P07 (SIN1, SOUT1, #SCLK1,
#SRDY1) are used for channel 1. If the bit for a pin is set to "0", the pin functions as an I/O port.
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.
SSIN3: Serial I/F Ch.3 SIN selection (D0) / Port SIO function extension register (0x402D7)
Switches the function of pin P33/#DMAACK1/SIN3.
Write "1": SIN3
Write "0": P33/#DMAACK1
Read: Valid
To use the pin as SIN3, set SSIN3 (D0 / 0x402D7) to "1" and CFP33 (D3 / 0x402DC) to "0".
To use the pin as P33 or #DMAACK1, set this bit to "0".
At power-on, this bit is set to "0".
B-III-8-32
Name Function
CFP07 P07 function selection
CFP06 P06 function selection
CFP05 P05 function selection
CFP04 P04 function selection
CFP03 P03 function selection
CFP02 P02 function selection
CFP01 P01 function selection
CFP00 P00 function selection
– reserved
SSRDY3 Serial I/F Ch.3 SRDY selection
SSCLK3 Serial I/F Ch.3 SCLK selection
SSOUT3 Serial I/F Ch.3 SOUT selection
SSIN3 Serial I/F Ch.3 SIN selection
– reserved
SSRDY2 Serial I/F Ch.2 SRDY selection
SSCLK2 Serial I/F Ch.2 SCLK selection
SSOUT2 Serial I/F Ch.2 SOUT selection
SSIN2 Serial I/F Ch.2 SIN selection
CFEX7 P07 port extended function
CFEX6 P06 port extended function
CFEX5 P05 port extended function
CFEX4 P04 port extended function
CFEX3 P31 port extended function
CFEX2 P21 port extended function
CFEX1 P10, P11, P13 port extended
function
CFEX0 P12, P14 port extended function
Setting
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
–
1 #SRDY3 0 P32/
#DMAACK0
1 #SCLK3 0 P15/EXCL4/
#DMAEND0
1 SOUT3 0 P16/EXCL5/
#DMAEND1
1 SIN3 0 P33/
#DMAACK1
–
1 #SRDY2 0 P24/TM2
1 #SCLK2 0 P25/TM3
1 SOUT2 0 P26/TM4
1 SIN2 0 P27/TM5
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 0 P10, etc.
DST1 P11, etc.
DPC0 P13, etc.
1 DST2 0 P12, etc.
DCLK P14, etc.
EPSON
Init. R/W Remarks
0 R/W Extended functions
0 R/W (0x402DF)
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
– –
0 R/W
0 R/W
0 R/W
0 R/W
– –
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
1 R/W
1 R/W
S1C33L03 FUNCTION PART