4 POWER SUPPLY
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
4-1
Power Supply
4
This section explains the operating voltage of the S1C33L26.
Power Supply Pins
4.1
The S1C33L26 has the power supply pins shown in Table 4.1.1.
1.1 Power Supply Pins
Table 4.
No.
Pin name
I/O
Description
Pin No.
Power voltage
TQFP15
128
TQFP24
144
PFBGA
180
1 HV
DD
– I/O power supply pin
1, 28,
58, 82,
109
1, 32,
65, 92,
121
C9, D4, D9, F11,
G11, K4, L10, L11
3.3 V typ. (2.7 to 3.6 V or
3.0 to 3.6 V when the USB
module is used.)
2 AV
DD
– Analog power supply pin
38
43
M5
3.3 V typ. (2.7 to 3.6 V or
3.0 to 3.6 V)
3 LV
DD
– Core power supply pin
14, 48,
70, 97,
118
16, 53,
78, 109,
132
C12, D6, D7, E4,
F4, J11, L8, M8
1.8 V typ. (1.65 to 1.95 V
or 1.7 to 1.9 V when a ce-
ramic resonator is used.)
4 RTCV
DD
– RTC/BBRAM power supply pin
33
37
N2
1.8 V typ. (= LV
DD
)
5 V
SS
– Ground pin
8, 22,
36, 51,
65, 76,
91, 104,
113,
124
8, 24,
40, 56,
73, 86,
101,
116,
127,
138
B4, C10, D8, D10,
E5, E6, E7, E8,
E9, E10, F5, F10,
G5, G10, H4, H5,
H10, H11, J4, J5,
J10, K5, K6, K7,
K8, K9, K10, K11,
L4, L5, L6, L7,
M6, M13, N3, N8
GND
6 PLLV
DD
– PLL power supply pin
47
52
M7
1.8 V typ. (= LV
DD
)
7 PLLV
SS
– PLL power supply ground pin
45
50
P7
GND (= V
SS
)
I/O
Interface circuit
CPU core
Internal logic
circuits
LV
DD
*
1: 1.65 to 1.95 V (1.7 to 1.9 V when a ceramic resonator is used.)
*
2: 2.7 to 3.6 V (3.0 to 3.6 V when the USB module is used.)
*
3: 2.7 to 3.6 V or 3.0 to 3.6 V
1.8 V typ.
*
1
V
SS
GND
PLLV
DD
1.8 V typ.
*
1
HV
DD
3.3 V typ.
*
2
PLLV
SS
GND
OSC3
PLL
RTC/OSC1
BBRAM
RTCV
DD
1.8 V typ.
*
1
Analog circuits
(A/D converter)
AV
DD
3.3 V typ.
*
3
1.1 Power Supply System
Figure 4.