Epson S1C17624 Technical Manual page 112

9 i/O PORTS (P)
P4[7:4] Port Function Select Register (P44_47PMuX)
Register name address Bit
P4[7:4] Port 0x52a9 D7–6 P47MuX[1:0] P47 port function select
Function Select
(8 bits)
Register
(P44_47PMuX)
S1C17624/622 D5–4 P46MuX[1:0] P46 port function select
D3–2 P45MuX[1:0] P45 port function select
D1–0 P44MuX[1:0] P44 port function select
note: This register is effective only in the S1C17624/622.
The P44 to P47 port pins are shared with the peripheral module pins. This register is used to select how the pins are
used.
D[7:6] P47MuX[1:0]: P47 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): Reserved
0x1 (R/W): TOUT4 (T8OSC1)
0x0 (R/W): P47/EXCL5 (T16A2 Ch.0) (default)
To use the P47 pin for EXCL5 input, set P4OEN7/P4_OEN register to 0, P4IEN7/P4_IEN register to 1
and EXCL5S/P54_56PMUX register to 1.
D[5:4] P46MuX[1:0]: P46 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): Reserved
0x1 (R/W): RFCLKO (RFC)
0x0 (R/W): P46 (default)
D[3:2] P45MuX[1:0]: P45 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): Reserved
0x1 (R/W): SDA1 (I2CS)
0x0 (R/W): P45 (default)
D[1:0] P44MuX[1:0]: P44 Port Function Select Bits
0x3 (R/W): Reserved
0x2 (R/W): Reserved
0x1 (R/W): SCL1 (I2CS)
0x0 (R/W): P44 (default)
9-22
name Function
Seiko epson Corporation
Setting
P47MUX[1:0] Function
0x3 reserved
0x2 reserved
0x1 TOUT4
0x0 P47/EXCL5
P46MUX[1:0] Function
0x3 reserved
0x2 reserved
0x1 RFCLKO
0x0 P46
P45MUX[1:0] Function
0x3 reserved
0x2 reserved
0x1 SDA1
0x0 P45
P44MUX[1:0] Function
0x3 reserved
0x2 reserved
0x1 SCL1
0x0 P44
(EXCL5 is available only in the S1C17624.)
S1C17624/604/622/602/621 TeChniCal Manual
init. R/W Remarks
0x0 R/W EXCL5:
S1C17624 only
(Set EXCL5S to 1.)
0x0 R/W
0x0 R/W
0x0 R/W