SH3000UM SEMTECH [Semtech Corporation], SH3000UM Datasheet - Page 7

• Manufacturer Part Number: SH3000UM
• Manufacturer: SEMTECH [Semtech Corporation]

©2006 Semtech Corp.
POWER MANAGEMENT
POWER MANAGEMENT
Pin Descriptions (continued)
Pin
10
11
12
13
14
15
16
9
T
TEST (V
Pin Name
CLK
CLK32
CLK
I
R
N
O
R
REF
RST
/I
ST
OUT
NT
IN
Thermal Pad
SS
)
Digital Out
Digital Out
Digital Out
Digital Out
Digital In
Digital In
Analog
Type
I/O
Optional 1MΩ external bias resistor for internal 32.768 kHz RC oscillator. Can
be used to set, trim or modulate the internal RC oscillator. Keep open if not
used.
Active low system reset output. Asserted with a strong low state when a reset
condition occurs. Weakly pulled to V
valid for V
Active high system reset output. Asserted with a strong high state when a reset
condition occurs. Weakly pulled to V
valid for V
Factory test enable. All V
Buffered internal 32.768 kHz clock, derived according to the CLK
Pin uses backup power for the buffer when V
high, this signal is either at V
When enabled, this signal runs continuously independent of CLK
Minimize the external load to reduce power consumption during backup opera-
tions. When disabled, this pin is driven to V
Serial communications interface and interrupt output pin. Pin is internally weakly
pulled to opposite of programmed interrupt polarity. If interrupt is programmed to
be active low, pin is weakly pulled to V
Clock activity sense input. Detects when target microcontroller enters stop mode
(which disables its clock). Connect to the microcontroller’s clock output or oscil-
lator output pin. Connect to V
Programmable high frequency clock output. Connect to the target microcon-
troller’s clock input or oscillator input pin. Keep open if not used.
Pad for heatsinking purposes. Connect to ground plane using multiple vias. Not
connected internally.
DD
DD
as low as 1V. Keep open if not used.
as low as 1 V. Keep open if not used.
7
SS
pins & TEST (V
BAK
SS
or V
when not used. CLK
Pin Function
DD
DD
SS
DD
internally when not active. This signal is
(if V
internally when not active. This signal is
when inactive. Keep open if not used.
SS
DD
SS
DD
) pin must be connected together.
. Keep open if not used.
is higher than the reset threshold).
is not present. When driving
IN
must not be left open.
OUT
SEL
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SH3003
pin setting.
activity.