Epson S1C31W65 Technical Manual page 22

1 OVERVIEW
Assigned
Pin name
signal
P66 P66
COM5
SEG1
P67 P67
COM4
SEG0
PD0 SWCLK
PD0
PD1 SWD
PD1
PD2 PD2
OSC3
PD3 PD3
OSC4
PD4 PD4
PD5 V
PP
PD5
PD6 PD6
C
P1
PD7 PD7
C
P2
COM0–3 COM0–3
SEG4–12, SEG4–12,
25–31, 48–52 25–31, 48–52
Note: In the peripheral circuit descriptions, the assigned signal name is used as the pin name.
Universal port multiplexer (UPMUX)
The universal port multiplexer (UPMUX) allows software to select the peripheral circuit input/output function
to be assigned to each pin from those listed below.
Table 1.3.3.2 Peripheral Circuit Input/output Function Selectable by UPMUX
Peripheral circuit
Synchronous serial
interface
(SPIA)
I C
2
(I2C)
UART
(UART3)
16-bit PWM timer
(T16B)
Note: Do not assign a function to two or more pins simultaneously.
1-8
Tolerant
I/O Initial state fail-safe
structure
I/O Hi-Z
✓
A
A
I/O Hi-Z
✓
A
A
I I (Pull-up)
✓
I/O
I/O I (Pull-up)
✓
I/O
I/O Hi-Z –
A
I/O Hi-Z –
A
O O (L) –
P Hi-Z
✓
I/O
I/O Hi-Z –
A
I/O Hi-Z –
A
A Hi-Z –
A Hi-Z –
Signal to be assigned I/O
SDIn I
SDOn O
SPICLKn I/O
#SPISSn I
SCLn I/O
SDAn I/O
USINn I
USOUTn O
TOUTn0/CAPn0 I/O
TOUTn1/CAPn1 I/O
TOUTn2/CAPn2 I/O
TOUTn3/CAPn3 I/O
Seiko Epson Corporation
I/O port
LCD common output
LCD segment output
I/O port
LCD common output
LCD segment output
Serial-wire debugger clock input
I/O port
Serial-wire debugger data input/output
I/O port
I/O port
OSC3 oscillator circuit input
I/O port
OSC3 oscillator circuit output
Output port
Power supply for Flash programming
I/O port
I/O port (power supply voltage: V
LCD voltage boost capacitor connect pin
I/O port (power supply voltage: V
LCD voltage boost capacitor connect pin
LCD common outputs
LCD segment outputs
Channel number n
n = 0
SPIA Ch.n data input
SPIA Ch.n data output
SPIA Ch.n clock input/output
SPIA Ch.n slave-select input
n = 0, 1 I2C Ch.n clock input/output
I2C Ch.n data input/output
n = 0, 1 UART3 Ch.n data input
UART3 Ch.n data output
n = 0, 1, 2
T16B Ch.n PWM output/capture input 0
T16B Ch.n PWM output/capture input 1
T16B Ch.n PWM output/capture input 2
T16B Ch.n PWM output/capture input 3
Function
)
C3
)
C3
Function
S1C31W65 TECHNICAL MANUAL
(Rev. 1.1)