1 OVERVIEW
1-8
Seiko Epson Corporation
S1C31D50/D51 TECHNICAL MANUAL
(Rev. 2.00)
1.3.2 Pin Descriptions
Symbol meanings
Assigned signal: The signal listed at the top of each pin is assigned in the initial state. The pin function must be
switched via software to assign another signal (see the “I/O Ports” chapter).
I/O:
I
= Input
O
= Output
I/O
= Input/output
P
= Power supply
A
= Analog signal
Hi-Z
= High impedance state
Initial state:
I (Pull-up) = Input with pulled up
I (Pull-down) = Input with pulled down
Hi-Z
= High impedance state
O (H)
= High level output
O (L)
= Low level output
Tolerant fail-safe structure:
✓
= Over voltage tolerant fail-safe type I/O cell included (see the “I/O Ports” chapter)
Table 1.3.2.1 Pin Description
Pin
name
Assigned
signal
I/O Initial state
Tolerant
fail-safe
structure
Function
Package
48-pin 64-pin 80-pin 100-pin
V
DD
V
DD
P
–
–
Power supply (+)
✓ ✓ ✓ ✓
V
SS
V
SS
P
–
–
GND
✓ ✓ ✓ ✓
V
PP
V
PP
P
–
–
Power supply for Flash programming
✓ ✓ ✓ ✓
V
D1
V
D1
A
–
–
V
D1
regulator output
✓ ✓ ✓ ✓
V
DDQSPI
V
DDQSPI
P
–
–
QSPI interface/P9 port group power supply
✓ ✓ ✓ ✓
OSC1
OSC1
A
–
–
OSC1 oscillator circuit input
✓ ✓ ✓ ✓
OSC2
OSC2
A
–
–
OSC1 oscillator circuit output
✓ ✓ ✓ ✓
TEST
TEST
I
I (Pull-down)
–
Test mode enable input
✓ ✓ ✓ ✓
#RESET #RESET
I
I (Pull-up)
–
Reset input
✓ ✓ ✓ ✓
P00
P00
I/O
Hi-Z
✓
I/O port
– – –
✓
UPMUX
I/O
User-selected I/O (universal port multiplexer)
P01
P01
I/O
Hi-Z
✓
I/O port
– – –
✓
UPMUX
I/O
User-selected I/O (universal port multiplexer)
P02
P02
I/O
Hi-Z
✓
I/O port
– – –
✓
UPMUX
I/O
User-selected I/O (universal port multiplexer)
P03
P03
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
UPMUX
I/O
User-selected I/O (universal port multiplexer)
P04
P04
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
UPMUX
I/O
User-selected I/O (universal port multiplexer)
P05
P05
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
UPMUX
I/O
User-selected I/O (universal port multiplexer)
P06
P06
I/O
Hi-Z
✓
I/O port
✓ ✓ ✓ ✓
UPMUX
I/O
User-selected I/O (universal port multiplexer)
P07
P07
I/O
Hi-Z
✓
I/O port
– –
✓ ✓
UPMUX
I/O
User-selected I/O (universal port multiplexer)
P10
P10
I/O
Hi-Z
–
I/O port
– –
✓ ✓
UPMUX
I/O
User-selected I/O (universal port multiplexer)
ADIN07
A
12-bit A/D converter Ch.0 analog signal input 7
P11
P11
I/O
Hi-Z
–
I/O port
–
✓ ✓ ✓
UPMUX
I/O
User-selected I/O (universal port multiplexer)
ADIN06
A
12-bit A/D converter Ch.0 analog signal input 6
P12
P12
I/O
Hi-Z
–
I/O port
–
✓ ✓ ✓
UPMUX
I/O
User-selected I/O (universal port multiplexer)
ADIN05
A
12-bit A/D converter Ch.0 analog signal input 5
P13
P13
I/O
Hi-Z
–
I/O port
✓ ✓ ✓ ✓
UPMUX
I/O
User-selected I/O (universal port multiplexer)
ADIN04
A
12-bit A/D converter Ch.0 analog signal input 4
P14
P14
I/O
Hi-Z
–
I/O port
✓ ✓ ✓ ✓
UPMUX
I/O
User-selected I/O (universal port multiplexer)
ADIN03
A
12-bit A/D converter Ch.0 analog signal input 3