I/O Pins Of Serial Interface - Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Technical Manual

III PERIPHERAL BLOCK: SERIAL INTERFACE

I/O Pins of Serial Interface

Table 8.1 lists the I/O pins used by the serial interface.
Pin name I/O
P00/SIN0 I/O I/O port / Serial IF Ch.0 data input
P01/SOUT0 I/O I/O port / Serial IF Ch.0 data output
P02/#SCLK0 I/O I/O port / Serial IF Ch.0 clock input/output
P03/#SRDY0 I/O I/O port / Serial IF Ch.0 ready input/output
P04/SIN1/ I/O I/O port / Serial IF Ch.1 data input
#DMAACK2 / #DMAACK2 signal output
P05/SOUT1/ I/O I/O port / Serial IF Ch.1 data output
#DMAEND2 / #DMAEND2 signal output
P06/#SCLK1/ I/O I/O port / Serial IF Ch.1 clock input/output
#DMAACK3 / #DMAACK3 signal output
P07/#SRDY1/ I/O I/O port / Serial IF Ch.1 ready input/output
#DMAEND3 / #DMAEND3 signal output
P27/TM5/SIN2 I/O I/O port / Serial IF Ch.2 data input
P26/TM4/SOUT2 I/O I/O port / Serial IF Ch.2 data output
P25/TM3/#SCLK2 I/O I/O port / Serial IF Ch.2 serial clock input/output CFP25(D5)/Function select register(0x402D8)
P24/TM2/#SRDY2 I/O I/O port / Serial IF Ch.2 ready input/output
P33/#DMAACK1/ I/O I/O port / Serial IF Ch.3 data input
SIN3
P16/EXCL5/ I/O I/O port / Serial IF Ch.3 data output
#DMAAND1/
SOUT3
P15/EXCL4/ I/O I/O port / Serial IF Ch.3 serial clock input/output CFP15(D5)/Function select register(0x402D4)
#DMAAND0/
#SCLK3
P32/#DMAACK0/ I/O I/O port / Serial IF Ch.3 ready input/output
#SRDY3
SINx (serial-data input pin)
This pin is used to input serial data to the device, regardless of the transfer mode.
SOUTx (serial-data output pin)
This pin is used to output serial data from the device, regardless of the transfer mode.
#SCLKx (clock input/output pin)
This pin is used to input or output a clock.
In the clock-synchronized slave mode, it is used as a clock input pin; in the clock-synchronized master mode,
it is used as a clock output pin.
In the asynchronous mode, this pin is used as clock input when an external clock is used. This pin is not used
when the internal clock is used, so it can be used as an I/O port.
#SRDYx (ready-signal input/output pin)
This pin is used to input or output the ready signal that is used in the clock-synchronized mode.
In the clock-synchronized slave mode, it is used as a ready-signal output pin; in the clock-synchronized
master mode, it is used as a ready-signal input pin.
This pin is not used in the asynchronous mode, so it can be used as an I/O port.
Method for setting the serial-interface input/output pins
All of the pins used in the serial interface are shared with I/O ports. At cold start, they are all set for I/O port
pins P0x (function select bit Pxx, CFPxx = "0"). When using the serial interface, make function select bit
settings for the pins used, according to the channel and transfer mode to be used.
At hot start, the pins retain their status from prior to the reset.
B-III-8-2
Table 8.1 Serial-Interface Pin Configuration
Function
EPSON
Function select bit
CFP00(D0)/P0 function select register(0x402D0)
CFP01(D1)/P0 function select register(0x402D0)
CFP02(D2)/P0 function select register(0x402D0)
CFP03(D3)/P0 function select register(0x402D0)
CFP04(D4)/P0 function select register(0x402D0)
CFEX4(D4)/Port function extension register(0x402DF)
CFP05(D5)/P0 function select register(0x402D0)
CFEX5(D5)/Port function extension register(0x402DF)
CFP06(D6)/P0 function select register(0x402D0)
CFEX6(D6)/Port function extension register(0x402DF)
CFP07(D7)/P0 function select register(0x402D0)
CFEX7(D7)/Port function extension register(0x402DF)
CFP27(D7)/Function select register(0x402D8)
SSIN2(D0)/Function select register(0x402DB)
CFP26(D6)/Function select register(0x402D8)
SSOUT2(D1)/Function select register(0x402DB)
SSCLK2(D2)/Function select register(0x402DB)
CFP24(D4)/Function select register(0x402D8)
SSRDY2(D3)/Function select register(0x402DB)
CFP33(D3)/Function select register(0x402DC)
SSIN3(D0)/Function select register(0x402D7)
CFP16(D6)/Function select register(0x402D4)
SSOUT3(D1)/Function select register(0x402D7)
SSCLK3(D2)/Function select register(0x402D7)
CFP32(D2)/Function select register(0x402DC)
SSRDY3(D3)/Function select register(0x402D7)
S1C33L03 FUNCTION PART