SH3001 SEMTECH [Semtech Corporation], SH3001 Datasheet - Page 3

• Manufacturer Part Number: SH3001
• Description: Real-Time Clock and Clock Management Support IC for Microcontrollers
• Manufacturer: SEMTECH [Semtech Corporation]

Copyright ©2002-2005 Semtech Corporation
SYSTEM MANAGEMENT
Pin Descriptions
Pin
10
11
12 T
13
14
15
16
1
2
3
4
5
6
7
8
9
CLK
EST
CLK
CLK32
Name
IO/I
CLK
V
X
V
V
V
V
X
NC
NC
NC
REG
OUT
BAK
DD
SS
SS
IN
(V
OUT
SEL
NT
IN
SS
)
Analog Out
Digital Out
Digital Out
Analog In
Digital In
Digital In
Digital In
Power
Power
Power
Power
Power
Type
I/O
Ground, 0 V. All V
Output of internal Voltage Regulator, 2.2 V nominal. This pin can power external loads
of <5 mA. If load is “noisy” it requires a bypass capacitor. May be left unconnected or
used as a high logic level signal for CLK
Main power supply, +2.3 to +5.5 V.
Backup power supply for real-time clock, +2.3 to +5.5 V (+1.8 to +5.5 V typical). This
voltage can be higher or lower than V
capacitor (with external recharge circuit). Connect to V
Oscillator pins for optional external low frequency crystal, typically 32.768 kHz crystal
with nominal 12.5 pF load capacitance. Keep open or connect to V
Must be tied to V
Ground, 0 V. All V
Not connected - reserved
Not connected - reserved
Not connected - reserved
Factory test enable. All V
Buffered internal 32.768 kHz clock, derived according to the CLK
uses backup power for the buffer when V
is either at V
signal runs continuously independent of CLK
reduce power consumption during backup operations. When disabled, this pin is driven
to V
Serial communications interface and interrupt output pin. This pin is internally weakly
pulled to the opposite of the programmed interrupt polarity. For example, if interrupt is
programmed to be active low, this pin is weakly pulled to V
open if not used.
Clock activity sense input. Used to detect when the target microcontroller enters stop
mode (which disables its clock). Connect to the microcontroller’s clock output or
oscillator output pin. Connect to V
Programmable high frequency clock output. Connect to the target microcontroller’s clock
input or oscillator input pin. Keep open if not used.
SS
. Keep open if not used.
BAK
or V
REG
SS
SS
DD
pins and T
pins and T
(if V
SS
DD
3
pins and T
is higher than the reset threshold). When enabled, this
EST
EST
SS
(V
(V
DD
when not used. CLK
SS
SS
Function
EST
SEL
. Connect a backup battery or backup
DD
) pin must be connected together.
) pin must be connected together.
(V
is not present. When driving high, this signal
OUT
pin (see below).
SS
) pin must be connected together.
activity. Minimize the external load to
DD
SH3001 MicroBuddy™
if not used.
IN
DD
must not be left open.
when inactive. Keep
V1.15
SEL
SS
pin setting. This pin
if not used.
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