1-9
Seiko Epson Corporation
S1C31D50 TECHNICAL MANUAL
(Rev. 1.00)
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
Pin function
I/O
Initial
Tolerant
fail-safe
structure
Description
VDD
VDD
P
-
-
Power(+)
VSS
VSS
P
-
-
GND
VPP
VPP
P
-
-
Flash Programing Power
VD1
VD1
A
-
-
VD1 Regulator Output
VDDQSPI
VDDQSPI
P
-
-
SPI interface voltage supply.
OSC1
OSC1
A
-
-
OSC1 oscillator input
OSC2
OSC2
A
-
-
OSC1 oscillator output
TEST
TEST
I
I(Pull-down)
-
Test mode enable
#RESET
#RESET
I
I(Pull-up)
-
Reset input
P00
P00
I/O
Hi-Z
✓
I/O port
UPMUX
User-selected I/O (universal port multiplexer)
P01
P01
I/O
Hi-Z
✓
I/O port
UPMUX
User-selected I/O (universal port multiplexer)
P02
P02
I/O
Hi-Z
✓
I/O port
UPMUX
User-selected I/O (universal port multiplexer)
P03
P03
I/O
Hi-Z
✓
I/O port
UPMUX
User-selected I/O (universal port multiplexer)
P04
P04
I/O
Hi-Z
✓
I/O port
UPMUX
User-selected I/O (universal port multiplexer)
P05
P05
I/O
Hi-Z
✓
I/O port
UPMUX
User-selected I/O (universal port multiplexer)
P06
P06
I/O
Hi-Z
✓
I/O port
UPMUX
User-selected I/O (universal port multiplexer)
P07
P07
I/O
Hi-Z
✓
I/O port
UPMUX
User-selected I/O (universal port multiplexer)
P10
P10
I/O
Hi-Z
-
I/O port
UPMUX
User-selected I/O (universal port multiplexer)
ADIN7
ADC ch.7
P11
P11
I/O
Hi-Z
-
I/O port
UPMUX
User-selected I/O (universal port multiplexer)
ADIN6
ADC ch.6
Summary of Contents for S1C31D50
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