Rainbow Electronics DS1384 - Manual

1 of 17 091300
FEATURES
Keeps track of hundredths of seconds,
seconds, minutes, hours, days, date of the
month, months, and years with leap year
compensation valid up to 2100
Watchdog timer restarts an out-of-control
processor
Alarm function schedules real-time related
activities
Programmable interrupts and square wave
outputs
Bytewide RAM-like access
50 bytes of on board user RAM
Greater than 10 years timekeeping and data
retention in the absence of power with small
lithium coin cells
Supports up to 128k x 8 of external static RAM
All timekeeping registers and on board RAM
are individually addressable via the address
and data bus
ORDERING INFORMATION
DS 1384FP-12 44-Pin FP
PIN ASSIGNMENT
PIN DESCRIPTION
INTA - Interrupt Output A (open drain)
INTB (INTB) - Interrupt Output B (open drain)
A0-A16 - Address Inputs
DQ0-DQ7 - Data Input/Output
CE - Chip Enable
OE - Output Enable
WE - Write Enable
V
CC
- +5V Input
GND - Ground
NC - No Connection
SQW - Square Wave Output
X1, X2 - 32.768 kHz Crystal Connections
PFO - Power Fail Output
CEO - Chip Enable RAM
OER - Output Enable RAM
V
CCO
- Voltage Out
V
BAT1
- +3V Battery Input
V
BAT2
- +3V Battery Input
DS1384
Watchdog Timekeeping Controller
www.dalsemi.com
INTB/(INTB)
NC
A14
A12
A7
A6
A5
A4
A3
A2
A1
A15
V
BAT1
WE
A13
A8
A9
A11
OE
A10
CE
OER
A0
D
Q
0
D
Q
1
D
Q
2
GND D
Q
3
D
Q
4
D
Q
5
D
Q
6
D
Q
7
CEO
1
11
12 22
23
33
GND X1 X2 GND A1
6
INT
A
V
CC
V
CCO
SQW PF0 V
BA
T
2
44 34