1 OVERVIEW
1-10
Seiko Epson Corporation
S1C31D50/D51 TECHNICAL MANUAL
(Rev. 2.00)
Pin
name
Assigned
signal
I/O Initial state
Tolerant
fail-safe
structure
Function
Package
48-pin 64-pin 80-pin 100-pin
P51
SDACOUT_N O
O (L)
✓
Sound DAC nagetive output
✓ ✓ ✓ ✓
P51
I/O
I/O port
P52
P52
I/O
Hi-Z
✓
I/O port
– –
✓ ✓
P53
P53
I/O
Hi-Z
✓
I/O port
– –
✓ ✓
P54
P54
I/O
Hi-Z
✓
I/O port
– – –
✓
P55
P55
I/O
Hi-Z
✓
I/O port
– – –
✓
P56
P56
I/O
Hi-Z
✓
I/O port
– – –
✓
P57
P57
I/O
Hi-Z
✓
I/O port
– – –
✓
P60
P60
I/O
Hi-Z
✓
I/O port
– – –
✓
P61
P61
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
EXSVD0
A
Supply voltage detector external voltage detection input 0
P62
P62
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
EXSVD1
A
Supply voltage detector external voltage detection input 1
P63
P63
I/O
Hi-Z
✓
I/O port
– –
✓ ✓
P64
P64
I/O
Hi-Z
✓
I/O port
– –
✓ ✓
P65
P65
I/O
Hi-Z
✓
I/O port
– – –
✓
P66
P66
I/O
Hi-Z
✓
I/O port
– – –
✓
P67
P67
I/O
Hi-Z
✓
I/O port
– – –
✓
P70
P70
I/O
Hi-Z
✓
I/O port
–
✓ ✓ ✓
P71
P71
I/O
Hi-Z
✓
I/O port
–
✓ ✓ ✓
P72
P72
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
EXCL10
I
16-bit PWM timer Ch.1 event counter input 0
P73
P73
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
EXCL11
I
16-bit PWM timer Ch.1 event counter input 1
P74
P74
I/O
Hi-Z
✓
I/O port
– –
✓ ✓
P75
P75
I/O
Hi-Z
✓
I/O port
– – –
✓
P76
P76
I/O
Hi-Z
✓
I/O port
– – –
✓
P77
P77
I/O
Hi-Z
✓
I/O port
– – –
✓
P80
P80
I/O
Hi-Z
✓
I/O port
– –
✓ ✓
P81
P81
I/O
Hi-Z
✓
I/O port
–
✓ ✓ ✓
P82
P82
I/O
Hi-Z
✓
I/O port
–
✓ ✓ ✓
P83
P83
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
EXOSC
I
Clock generator external clock input
P84
P84
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
EXCL00
I
16-bit PWM timer Ch.0 event counter input 0
P85
P85
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
EXCL01
I
16-bit PWM timer Ch.0 event counter input 1
P86
P86
I/O
Hi-Z
✓
I/O port
– –
✓ ✓
P87
P87
I/O
Hi-Z
✓
I/O port
– –
✓ ✓
P90
P90
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
QSPICLK0
I/O
Quad synchronous serial interface Ch.0 clock input/output
P91
P91
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
QSDIO00
I/O
Quad synchronous serial interface Ch.0 data input/output
P92
P92
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
QSDIO01
I/O
Quad synchronous serial interface Ch.0 data input/output
P93
P93
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
QSDIO02
I/O
Quad synchronous serial interface Ch.0 data input/output
P94
P94
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
QSDIO03
I/O
Quad synchronous serial interface Ch.0 data input/output
P95
P95
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
#QSPISS0
I/O
Quad synchronous serial interface Ch.0 slave-select
input/output
PA0
PA0
I/O
Hi-Z
✓
I/O port
– –
✓ ✓
PA1
PA1
I/O
Hi-Z
✓
I/O port
–
✓ ✓ ✓
PA2
PA2
I/O
Hi-Z
✓
I/O port
–
✓ ✓ ✓
PA3
PA3
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
FOUT
O
Clock external output
PA4
PA4
I/O
Hi-Z
✓
I/O port
– –
✓ ✓
PA5
PA5
I/O
Hi-Z
✓
I/O port
– – –
✓
PA6
PA6
I/O
Hi-Z
✓
I/O port
– – –
✓
PD0
SWCLK
I
I (Pull-up)
✓
Serial-wire debugger clock input
✓ ✓ ✓ ✓
PD0
I/O
I/O port