final i2c catalogue for pdf - E-LAB Computers

Clock/calendar with 240 x 8-bit RAM PCF8583
DESCRIPTION
The PCF8583 is a clock/calendar circuit based on a
256 x 8-bit static CMOS RAM. The built-in word
address register is incremented automatically after
each written or read data byte. Address pin AO is
used for programming the hardware address, allowing
the connection of two devices to the bus without
additional hardware.The built-in 32.768 kHz oscillator
circuit and the first 8 bytes of the RAM are used for
the clock/calendar and counter functions. The next 8
bytes may be programmed as alarm registers or used
as free RAM space. The remaining 240 bytes are free
RAM locations.
OSCI
OSCO
INT
VSS
VSS
A0
SCL
SDA
PCF8583
Oscillator
32.768 kHz
Power-on
reset
I 2 C-BUS
Interface
Divider
1:256
or
100 : 128
Control
logic
Address
FF register
control/status
hundredth of a second
second
minutes
hours
year/date
weekdays/months
timer
alarm control
alarm registers
or RAM
RAM
(240 x 8)
00
01
07
08
0F
FF
FEATURES
• Clock operating supply voltage
(0 to +70 ºC): 1.0 V to 6.0 V max. 50µA
• 240 x 8-bit low-voltage RAM
• Data retention voltage: 1.0 V to 6 V
• Clock function with four year calendar
• Universal timer with alarm and overflow indication
• 24 or 12 hour format
• 32.768 kHz or 50 Hz time base
• Slave address: - READ: A1 or A3
- WRITE: A0 or A2
Type number
PCF8583P/F5
PCF8583T/F5
Package
DIP 8
SOL 8
slave address
OSCI
OSCO
A0
V SS
1
2
3
4
PCF8583P
PCF8583T
8
7
6
5
V DD
INT
SCL
SDA
1 0 1
0 0 0 A0 R/W
Low power clock/calendar PCF8593
DESCRIPTION
The PCF8593 is a CMOS clock/calendar circuit,
optimized for low power consumption. The built-in word
address register is incremented automatically after
each written or read data byte. The built-in 32.768 kHz
oscillator circuit and the first 8 bytes of RAM are used
for the clock/calendar and counter functions. The next
8 bytes may be programmed as alarm registers or
used as free RAM space.
OSCI
OSCO
INT
reset
PCF8583
Oscillator
32.768 kHz
reset
Divider
1:256
or
100 : 128
Control
logic
control/status
hundredth of a second
second
minutes
hours
year/date
weekdays/months
timer
alarm control
00
01
07
08
SCL
SDA
I 2 C-BUS
Interface
Address
FF register
alarm registers
or RAM
0F
FEATURES
• Operating supply voltage: 2.5 to 6.0 V
• 8 bytes scratchpad RAM (when alarm not used)
• Data retention voltage: 1.0 to 6.0 V
• Operating current (fscl = 0 Hz, 32 kHz time base,
VDD = 2.0 V): TYP. 1µA
• Clock function with four year calendar
• Universal timer with alarm and overflow indication
• 24 or 12 hour format
• 32.768 kHz or 50 Hz time base
• Automatic word address incrementing
• Slave address: - READ A3
- WRITE A2
Type number
PCF8593P
PCF8593T
Package
DIP 8
SO 8
slave address
1 0 1 0 0 0 1 R/W
OSCI
OSCO
RESET
V SS
1
2
3
4
PCF8593P
PCF8593T
8
7
6
5
V DD
INT
SCL
SDA
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