參數(shù)資料
型號(hào)： SH3001IMLTRT
元件分類： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： REAL TIME CLOCK, QCC16
封裝： 3 X 3 MM, 0.90 MM HEIGHT, LEAD FREE, MLP-16
文件頁(yè)數(shù)： 1/20頁(yè)
文件大?。?/td> 788K
代理商： SH3001IMLTRT
2003-08-08
Copyright 2002-2005 Semtech Corporation 1
SH3001 data sheet V1.15
www.semtech.com
SH3001 MicroBuddy
Real-Time Clock and Clock Management
Support IC for Microcontrollers
SYSTEM MANAGEMENT
Description
The programmable SH3001 MicroBuddy (Buddy)
provides mandatory microcontroller support functions:
Clock Management System
Real-Time Support
Auxiliary functions
Three components make a complete system: any
microcontroller, the SH3001, and a bypass capacitor.
This low-cost system would consume very little power and
have clock-frequency accuracy of ± 0.5%. A fourth
component, a 32.768 kHz crystal, raises the clock
frequency accuracy to ± 0.0256% (± 256 ppm).
The SH3001 can operate completely stand-alone, or
under control of the microcontroller. A single-wire
interface handles bi-directional communications. The
SH3001 stores all configuration, calibration, parameters,
and status information in a 36-byte bank of control
registers. On reset, most of these are reloaded with
defaults from the factory-set nonvolatile memory. The
microcontroller can change any settings on the fly. If
some of the settings must remain fixed, a comprehensive
set of write-protect bits is provided for several related
groups of registers (with both permanent write-inhibit and
lock/unlock capabilities).
A backup power source can also be connected to the
SH3001. The IC can directly accommodate 2/3-cell zinc-
carbon/alkaline, 2/3-cell mercury, 2/3/4-cell NiCd/NiMH, 1-
cell Li/Li+ batteries, or a super cap.
Applications
Home automation and security
Consumer products
Portable/handheld computers
Industrial equipment
Any microcontroller-based product
Features
Highly integrated IC
- 3 mm x 3 mm x 0.9 mm 16-lead MLP (QFN) package
Clock Management System
- Replaces high-frequency (HF) crystal or resonator
- Programmable clock output from 32.768 kHz to 16 MHz
- Speed shift between multiple clock frequencies
- Adjustable spectrum spreading for EMI reduction
- Directly supports microcontroller STOP function
- Deep sleep with instantaneous auto-wakeup
Real-Time Support
- 179-year real-time clock, battery-backup capable
- Dedicated 32.768 kHz buffered clock output
- Built-in trim for 32.768 kHz oscillator to ± 4 ppm
- Programmable periodic interrupt / wakeup timer
Operates from 2.3 V to 5.5 V
IDD <850 A / 2 MHz, <3 mA / 16 MHz, <10 A / standby
IBUP <2 A / IBSB <50 nA (battery backup / standby)
Pin Configuration
3mm MLP (QFN) Package
SH3001
BTM
1
2
3
4
5
6
7
8
12
11
10
9
16
15
14
13
VSS
VREG
VDD
VBAK
X
IN
X
OUT
CLK
SEL
V
SS
NC
TEST (VSS)
NC
CLK32
IO/I
NT
CLK
IN
CLK
OUT
V+
Typical Application Circuit with High Clock Accuracy
SH3001
BTM
1
2
3
4
5
6
7
8
12
11
10
9
16
15
14
13
Controller
VDD
XIN
XOUT
GPIO WITH INT
GND
CBYPASS
Covered by US Patent No. 6,903,986
Semtech, the Semtech logo, MicroBuddy, Buddy, and B are
marks of Semtech Corporation. All other marks belong to their
respective owners.
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