I/O Memory Of Input Ports - Epson S1C33210 Technical Manual

I/O Memory of Input Ports

Table 9.2 shows the control bits of the input ports.
Register name Address Bit
K5 function 00402C0 D7–4
select register (B) D3
D2
D1
D0
K5 input port 00402C1 D7–5
data register (B) D4
D3
D2
D1
D0
K6 function 00402C3 D7
select register (B) D6
D5
D4
D3
D2
D1
D0
K6 input port 00402C4 D7
data register (B) D6
D5
D4
D3
D2
D1
D0
CFK52–CFK50: K5[2:0] function selection (D[2:0]) / K5 function select register (0x402C0)
CFK63–CFK60: K6[3:0] function selection (D[3:0]) / K6 function select register (0x402C3)
Selects the function of each input-port pin.
Write "1": Used for peripheral circuit
Write "0": Input port pin
Read: Invalid
When a bit of the CFK register is set to "1", the corresponding pin is set for use with the peripheral circuit (see Table
9.1). The pins for which register bits are set to "0" can be used as general-purpose input ports.
At cold start, CFK is set to "0" (input port). At hot start, CFK retains its state from prior to the initial reset.
K52D–K50D: K5[2:0] input port data (D[2:0]) / K5 input port data register (0x402C1)
K63D–K60D: K6[3:0] input port data (D[3:0]) / K6 input port data register (0x402C4)
The input data on each input port pin can be read from this register.
Read "1": High level
Read "0": Low level
Write: Invalid
The pin voltage of each input port can be read out "1" directly when the voltage is high (V
is low (V ) respectively.
SS
Since this register is a read-only register, writing to the register is ignored.
When the ports set for A/D converter input are read, the value obtained is always "0".
S1C33210 FUNCTION PART
Table 9.2 Control Bits of Input Ports
Name Function
– reserved
CP4 CP4
CFK52 K52 function selection
CFK51 K51 function selection
CFK50 K50 function selection
– reserved
– –
CP4D CP4 data
K52D K52 input port data
K51D K51 input port data
K50D K50 input port data
CP3 CP3
CP2 CP2
CP1 CP1
CP0 CP0
CFK63 K63 function selection
CFK62 K62 function selection
CFK61 K61 function selection
CFK60 K60 function selection
CP3D CP3 data
CP2D CP2 data
CP1D CP1 data
CP0D CP0 data
K63D K63 input port data
K62D K62 input port data
K61D K61 input port data
K60D K60 input port data
III PERIPHERAL BLOCK: INPUT/OUTPUT PORTS
Setting
–
1 – 0 CP4
1 #ADTRG 0 K52
1 #DMAREQ1 0 K51
1 #DMAREQ0 0 K50
–
1 – 0 –
1 High 0 Low
1 – 0 CP3
1 – 0 CP2
1 – 0 CP1
1 – 0 CP0
1 AD3 0 K63
1 AD2 0 K62
1 AD1 0 K61
1 AD0 0 K60
1 High 0 Low
EPSON
Init. R/W Remarks
– – Undefined when read.
0 R/W Always set to 0.
0 R/W
0 R/W
0 R/W
– – 0 when being read.
– R Undefined when read.
– R
– R
– R
– R
0 R/W Always set to 0.
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
– R
– R
– R
– R
– R
– R
– R
– R
) or "0" when the voltage
DD
B-III-9-3