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DS1680FP-3 Datasheet

  • DS1680FP-3

  • Portable System Controller with Touch-Screen Control

  • 337.09KB

  • 23頁

  • DALLAS   DALLAS

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DS1680
Portable System Controller
with Touch-Screen Control
www.maxim-ic.com
FEATURES
摟
Real-time clock (RTC)
鈭?/div>
Counts seconds, minutes, hours, date,
month, day of the week, and year with
leap-year compensation valid up to 2100
鈭?/div>
Power control circuitry supports system
power-on from day/time alarm
Microprocessor monitor
鈭?/div>
Halts microprocessor during power- fail
鈭?/div>
Automatically restarts microprocessor
after power failure
鈭?/div>
Monitors pushbutton for external
override
鈭?/div>
Halts and resets an out of control
microprocessor
NV RAM control
鈭?/div>
Automatic battery backup and write
protection to external SRAM
1.25V threshold detector for power- fail
warning
10-bit analog-to-digital converter (ADC)
鈭?/div>
Monotonic with no missing codes
Four-wire analog resistive touch-screen
interface
PIN ASSIGNMENT
I/O
SCLK
CEO
PFO
V
CCO
CS
V
CC
RST
CEI
34
33
PFI
GND
D7
D6
D5
D4
D3
D2
D1
D0
NEW_DATA
11
12
AVS
PEN_OFF
OSCIN
Y-
X+
V
REF
AIN0
AIN1
AVD
Y+
X-
23
22
INT
ST
44
1
V
BAT
X1
X2
AVG
BHE
COEN
OUT_SELECT
CONVERT
PD_RESET
PEN_SELECT
ANSELIN
摟
摟
摟
摟
摟
44-Pin MQFP (10 x 10 x 2mm)
Package dimension information can be found at:
http://www.maxim-ic.com/TechSupport/DallasPackInfo.htm
ORDERING INFORMATION
DS1680FP-3
DS1680FP-5
3.3V Operation
5.0V Operation
DESCRIPTION
The DS1680 incorporates many functions necessary for low-power portable products, providing an RTC,
NV RAM controller, microprocessor monitor, power- fail warning, 10-bit ADC, and a touch-screen
controller in one chip.
The RTC provides seconds, minutes, hours, day, date, month, and year information with leap-year
compensation as well as an alarm interrupt. This interrupt works when the DS1680 is powered by the
system power supply or when in battery-backup operation, so the alarm can be used to wake up a system
that is powered down.
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