S1R72104 Technical Manual
Rev.1.1
EPSON
5
Pin No.
Symbol
I/O
Functional description
Remarks
CPU interface-related matters (17)
24
AD0
Ipu
Address input pin (AD0 to AD4)
27 AD1
28 AD2
29 AD3
30 AD4
15
DB0
Ipu/O Data pin (DB0 to DB7)
Drive capability 3mA
16 DB1
17 DB2
18 DB3
20 DB4
21 DB5
22 DB6
23 DB7
35
XCS
Ispu Chip select signal for accessing internal register
34
XINT
Otr
Interrupt request output signal
Drive capability 6mA
32
XRD
Ispu Data lead signal
31
XWR
Ispu Data write signal
Others (17)
4
OSCIN
I
Input to built-in oscillation circuit (40MHz, 20MHz or
22.5MHz)
5
OSCOUT
O
Output from built-in oscillation circuit
13
TESTMON
O
Monitor output for testing (open “LOW” output usually)
Drive capability 2mA
33
XRESET
Ipu
System reset input signal
14
TESTEN
Ipd
Pin for testing (connected to LOW (GND) usually)
7
CLKSEL0
I
Input clock selection: LOW(GND): OSCIN / HIGH(LV
DD
):
EXCLK input
8
CLKSEL1
I
System clock selection: LOW(GND): PLL output /
HIGH(LV
DD
): Selecting signal of CLKSEL0
11
PLLCT0
I
Dependent on PLL operation control pin input clock; input
on 3.3V level
12
PLLCT1
I
Dependent on PLL operation control pin input clock; input
on 3.3V level
2
EXCLK
I
5V level external clock input pin (connected to LOW (GND)
when not used)
10
XPLLPD
I
PLL power-down pin
LOW (GND): PLL Power-down mode / HIGH (LV
DD
): PLL
operation
9 V
C
O
Internal
V
CO
control pin
74,83,
93,99
NC
- Not connected to IC chips (open usually)
HV
DD
:5V (5)
19,45,62,
72,76,80,
85,89,94,
98
HV
DD
P
Power supply for 5V interface
LV
DD
:3.3V (6)
1,6,26,51
LV
DD
P
Power supply for internal operation
V
SS
:0V (17)
3,25,36,
50,60,64,
67,70,75,
78,82,87,
91,96,100
V
SS
P
GND
Note :
I
: Input
O
: Output
Is
: Schmitt input
Ood
: Open drain output
Ipu
: Pull-up input
Otr
: Tristate output
Ispu
: Pull-up Schmitt input
Ipd
: Pull-down input