PHILIPS PCA8565

PCA8565
Real time clock/calender
Rev. 01 — 31 March 2003
Product data
1. General description
The PCA8565 is a CMOS real time clock/calendar optimized for low power
consumption. A programmable clock output, interrupt output and voltage-low detector
are also provided. All address and data are transferred serially via a two-line
bidirectional I2C-bus. Maximum bus speed is 400 kbit/s. The built-in word address
register is incremented automatically after each written or read data byte.
2. Features
■ Provides year, month, day, weekday, hours, minutes and seconds based on
32.768 kHz quartz crystal
■ Century flag
■ Clock operating voltage: 1.8 to 5.5 V
■ Extended operating temperature range: −40 to +125 °C
■ Low backup current; typical 0.5 µA at VDD = 3.0 V and Tamb = 25 °C
■ 400 kHz two-wire I2C-bus interface (at VDD = 1.8 to 5.5 V)
■ Programmable clock output for peripheral devices (32.768 kHz, 1024 Hz,
32 Hz and 1 Hz)
■ Alarm and timer functions
■ Integrated oscillator capacitor
■ Internal power-on reset
■ I2C-bus slave address: read A3H and write A2H
■ Open-drain interrupt pin.
3. Applications
■ Automotive
■ Industrial
■ Other applications that require a wide operating temperature range.
4. Quick reference data
Table 1:
Quick reference data
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VDD
supply voltage
I2C-bus active; fSCL = 400 kHz;
Tamb = −40 to +125 °C
1.8
-
5.5
V
IDD
supply current
fSCL = 400 kHz
-
-
820
µA
Tamb
ambient temperature
−40
-
+125
°C
PCA8565
Philips Semiconductors
Real time clock/calender
5. Ordering information
Table 2:
Ordering information
Type number
PCA8565TS
Package
Name
Description
Version
TSSOP8
plastic thin shrink small outline package; 8 leads; body width 3 mm
SOT505-1
6. Block diagram
CLKOUT
7
OSCI
OSCO
1
CONTROL/STATUS 1
0
CONTROL/STATUS 2
1
SECONDS/VL
2
3
MINUTES
3
4
HOURS
4
DAYS
5
WEEKDAYS
6
MONTHS/CENTURY
7
YEARS
8
2
OSCILLATOR
32.768 kHz
1 Hz
DIVIDER
INT
VSS
VDD
8
VOLTAGE
DETECTOR
OSCILLATOR
MONITOR
SCL
SDA
CONTROL
LOGIC
POR
6
5
I2C-BUS
INTERFACE
ADDRESS
REGISTER
PCA8565
MINUTE ALARM
9
HOUR ALARM
A
DAY ALARM
B
WEEKDAY ALARM
C
CLKOUT CONTROL
D
TIMER CONTROL
E
TIMER
F
MCE171
Fig 1. Block diagram.
7. Pinning information
7.1 Pinning
OSCI
1
OSCO
2
8
VDD
7
CLKOUT
PCA8565TS
INT
3
6
SCL
VSS
4
5
SDA
MCE170
Fig 2. Pin configuration.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
2 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
OSCI
OSCO
INT
VSS
1
8
2
7
3
6
4
5
VDD
CLKOUT
SCL
SDA
PCA8565
MCE169
Fig 3. Device diode protection diagram.
7.2 Pin description
Table 3:
Pin description
Symbol
Pin
Description
OSCI
1
oscillator input
OSCO
2
oscillator output
INT
3
interrupt output (open-drain; active LOW)
VSS
4
ground
SDA
5
serial data I/O
SCL
6
serial clock input
CLKOUT
7
clock output, open-drain
VDD
8
positive supply voltage
8. Functional description
The PCA8565 contains sixteen 8-bit registers with an auto-incrementing address
register, an on-chip 32.768 kHz oscillator with one integrated capacitor, a frequency
divider which provides the source clock for the Real Time Clock/calender (RTC), a
programmable clock output, a timer, an alarm, a voltage-low detector and a 400 kHz
I2C-bus interface.
All 16 registers are designed as addressable 8-bit parallel registers although not all
bits are implemented. The first two registers (memory address 00H and 01H) are
used as control and/or status registers. The memory addresses 02H through 08H are
used as counters for the clock function (seconds up to years counters). Address
locations 09H through 0CH contain alarm registers which define the conditions for an
alarm. Address 0DH controls the CLKOUT output frequency. 0EH and 0FH are the
timer control and timer registers, respectively.
The seconds, minutes, hours, days, weekdays, months, years as well as the minute
alarm, hour alarm, day alarm and weekday alarm registers are all coded in BCD
format.
When one of the RTC registers is read the contents of all counters are frozen.
Therefore, faulty reading of the clock/calendar during a carry condition is prevented.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
3 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
8.1 Alarm function modes
By clearing the MSB of one or more of the alarm registers (bit AE = alarm enable),
the corresponding alarm condition(s) will be active. In this way an alarm can be
generated from once per minute up to once per week. The alarm condition sets the
Alarm Flag (AF). The asserted AF can be used to generate an interrupt (INT).
The AF can only be cleared by software.
8.2 Timer
The 8-bit countdown timer at address 0FH is controlled by the timer control register at
address 0EH. The timer control register determines one of 4 source clock
frequencies for the timer (4096 Hz, 64 Hz, 1 Hz, or 1⁄60 Hz), and enables or disables
the timer. The timer counts down from a software-loaded 8-bit binary value. At the
end of every countdown, the timer sets the Timer Flag (TF). The TF may only be
cleared by software. The asserted TF can be used to generate an Interrupt (INT). The
interrupt may be generated as a pulsed signal every countdown period or as a
permanently active signal which follows the condition of TF. Bit TI/TP is used to
control this mode selection. When reading the timer, the current countdown value is
returned.
8.3 CLKOUT output
A programmable square wave is available at pin CLKOUT. Operation is controlled by
the CLKOUT control register at address 0DH. Frequencies of 32.768 kHz (default),
1024 Hz, 32 Hz and 1 Hz can be generated for use as a system clock,
microcontroller clock, input to a charge pump, or for calibration of the oscillator.
CLKOUT is an open-drain output and enabled at power-on. If disabled it becomes
high-impedance.
8.4 Reset
The PCA8565 includes an internal reset circuit which is active whenever the oscillator
is stopped. In the reset state the I2C-bus logic is initialized and all registers, including
the address pointer, are cleared with the exception of bits FE, VL, TD1, TD0, TESTC
and AE which are set to logic 1.
8.5 Voltage-low detector
The PCA8565 has an on-chip voltage-low detector. When VDD drops below Vlow,
bit VL in the seconds register is set to indicate that the integrity of the clock
information is no longer guaranteed. The VL flag can only be cleared by software.
Bit VL is intended to detect the situation when VDD is decreasing slowly, for example
under battery operation. Should VDD reach Vlow before power is re-asserted then
bit VL will be set. This will indicate that the time may be corrupted.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
4 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
MGR887
handbook, halfpage
VDD
normal power
operation
period of battery
operation
Vlow
t
VL set
Fig 4. Voltage-low detection.
8.6 Register organization
Table 4:
Binary formatted registers overview
Bit positions labelled as x are not implemented, those labelled with 0 should always be written with logic 0.
Address
Register name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
00H
control/status 1
TEST1
0
STOP
0
TESTC
0
0
0
01H
control/status 2
0
0
0
TI/TP
AF
TF
AIE
TIE
0DH
CLKOUT control
FE
x
x
x
x
x
FD1
FD0
0EH
timer control
TE
x
x
x
x
x
TD1
TD0
0FH
timer
<timer countdown value>
Table 5:
BCD formatted registers overview
Bit positions labelled as x are not implemented.
Address
Register name
BCD format tens nibble
Bit 7
23
Bit 6
22
Bit 5
21
BCD format units nibble
Bit 4
20
Bit 3
23
Bit 2
22
Bit 1
21
02H
seconds
VL
<seconds 00 to 59 coded in BCD>
03H
minutes
x
<minutes 00 to 59 coded in BCD>
04H
hours
x
x
<hours 00 to 23 coded in BCD>
05H
days
x
x
<days 01 to 31 coded in BCD>
06H
weekdays
x
x
x
07H
months/century
C
x
x
08H
years
09H
minute alarm
AE
0AH
hour alarm
AE
x
<hour alarm 00 to 23 coded in BCD>
0BH
day alarm
AE
x
<day alarm 01 to 31 coded in BCD>
0CH
weekday alarm
AE
x
x
x
<weekdays 0 to 6>
<months 01 to 12 coded in BCD>
<years 00 to 99 coded in BCD>
<minute alarm 00 to 59 coded in BCD>
x
x
x
<weekday alarm 0 to 6>
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Bit 0
20
Rev. 01 — 31 March 2003
5 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
8.6.1
Table 6:
Control/status 1 register
Control/status 1 (address 00H) bits description
Bit
Symbol
7
TEST1
6
0
5
STOP
4
0
3
TESTC
2 to 0
Value
Description
0
Normal mode
1
EXT_CLK test mode
default value is logic 0
0
RTC source clock runs
1
all RTC divider chain flip-flops are asynchronously set to logic 0; the RTC clock is
stopped (CLKOUT at 32.768 kHz is still available)
default value is logic 0
0
Power-on reset override facility is disabled; set to logic 0 for normal operation
1
Power-on reset override may be enabled
0
default value is logic 0
8.6.2
Control/status 2 register
Bits TF and AF: When an alarm occurs, AF is set to 1. Similarly, at the end of a timer
countdown, TF is set to 1. These bits maintain their value until overwritten by
software. If both timer and alarm interrupts are required in the application, the source
of the interrupt can be determined by reading these bits. To prevent one flag being
overwritten while clearing another a logic AND is performed during a write access.
Bits TIE and AIE: These bits activate or deactivate the generation of an interrupt
when TF or AF is asserted, respectively. The interrupt is the logical OR of these two
conditions when both AIE and TIE are set.
Table 7:
Control/status 2 (address 01H) bits description
Bit
Symbol
7 to 5
0
4
TI/TP
3
2
1
0
AF
TF
AIE
TIE
Value
Description
default value is logic 0
0
INT is active when TF is active (subject to the status of TIE)
1
INT pulses active according to Table 8 (subject to the status of TIE); note that if
AF and AIE are active then INT will be permanently active
0 (read)
alarm flag inactive
1 (read)
alarm flag active
0 (write)
alarm flag is cleared
1 (write)
alarm flag remains unchanged
0 (read)
timer flag inactive
1 (read)
timer flag active
0 (write)
timer flag is cleared
1 (write)
timer flag remains unchanged
0
alarm interrupt disabled
1
alarm interrupt enabled
0
timer interrupt disabled
1
timer interrupt enabled
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
6 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
Table 8:
INT operation (bit TI/TP = 1)
INT period (s)[2]
Source clock (Hz)
n = 1[1]
n>1
4 096
1⁄
8192
1⁄
4096
64
1⁄
128
1⁄
64
1
1⁄
64
1⁄
64
1⁄
60
1⁄
64
1⁄
64
[1]
[2]
8.6.3
Table 9:
TF and INT become active simultaneously.
n = loaded countdown value. Timer stopped when n = 0.
Time and date registers
Seconds/VL (address 02H) bits description
Bit
Symbol
Value
Description
7
VL
0
clock integrity is guaranteed
1
integrity of the clock information is no longer guaranteed
00 to 59
this register holds the current seconds coded in BCD format; example: seconds
register contains x101 1001 = 59 seconds
6 to 0
Table 10:
seconds
Minutes (address 03H) bits description
Bit
Symbol
Value
Description
6 to 0
minutes
00 to 59
this register holds the current minutes coded in BCD format
Table 11:
Hours (address 04H) bits description
Bit
Symbol
Value
Description
5 to 0
hours
00 to 23
this register holds the current hours coded in BCD format
Table 12:
Days (address 05H) bits description
Bit
Symbol
Value
Description
5 to 0
days[1]
01 to 31
this register holds the current day coded in BCD format
[1]
The PCA8565 compensates for leap years by adding a 29th day to February if the year counter contains a value which is exactly
divisible by 4, including the year 00.
Table 13:
Weekdays (address 06H) bits description
Bit
Symbol
Value
Description
2 to 0
weekdays[1]
0 to 6
this register holds the current weekday coded in BCD format, see Table 14
[1]
These bits may be re-assigned by the user.
Table 14:
Weekday assignments
Day
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Sunday
x
x
x
x
x
0
0
0
Monday
x
x
x
x
x
0
0
1
Tuesday
x
x
x
x
x
0
1
0
Wednesday
x
x
x
x
x
0
1
1
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
7 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
Table 14:
Table 15:
Day
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Thursday
x
x
x
x
x
1
0
0
Friday
x
x
x
x
x
1
0
1
Saturday
x
x
x
x
x
1
1
0
Months/century (address 07H) bits description
Bit
Symbol
7
century[1]
4 to 0
[1]
Weekday assignments…continued
month
Value
Description
this bit is toggled when the years register overflows from 99 to 00
0
indicates the century is 20xx
1
indicates the century is 19xx
01 to 12
this register holds the current month coded in BCD format, see Table 16
These bits may be re-assigned by the user.
Table 16:
Table 17:
Month assignments
Month
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
January
C
x
x
0
0
0
0
1
February
C
x
x
0
0
0
1
0
March
C
x
x
0
0
0
1
1
April
C
x
x
0
0
1
0
0
May
C
x
x
0
0
1
0
1
June
C
x
x
0
0
1
1
0
July
C
x
x
0
0
1
1
1
August
C
x
x
0
1
0
0
0
September
C
x
x
0
1
0
0
1
October
C
x
x
1
0
0
0
0
November
C
x
x
1
0
0
0
1
December
C
x
x
1
0
0
1
0
Years (address 08H) bits description
Bit
Symbol
Value
Description
7 to 0
years
00 to 99
this register holds the current year coded in BCD format
8.6.4
Alarm registers
When one or more of these registers are loaded with a valid minute, hour, day or
weekday and its corresponding bit Alarm Enable (AE) is logic 0, then that information
will be compared with the current minute, hour, day and weekday. When all enabled
comparisons first match, the Alarm Flag (AF) is set. AF will remain set until cleared
by software. Once AF has been cleared it will only be set again when the time
increments to match the alarm condition once more. Alarm registers which have their
bit AE at logic 1 will be ignored.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
8 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
Table 18:
Minute alarm (address 09H) bits description
Bit
Symbol
Value
Description
7
AE
0
minute alarm is enabled
1
minute alarm is disabled
6 to 0
alarm minutes
00 to 59
this register holds the minute alarm information coded in BCD format
Table 19:
Hour alarm (address 0AH) bits description
Bit
Symbol
Value
Description
7
AE
0
hour alarm is enabled
1
hour alarm is disabled
00 to 23
this register holds the hour alarm information coded in BCD format
5 to 0
Table 20:
alarm hours
Day alarm (address 0BH) bits description
Bit
Symbol
Value
Description
7
AE
0
day alarm is enabled
1
day alarm is disabled
5 to 0
alarm days
01 to 31
this register holds the day alarm information coded in BCD format
Table 21:
Weekday alarm (address 0CH) bits description
Bit
Symbol
Value
Description
7
AE
0
weekday alarm is enabled
1
weekday alarm is disabled
0 to 6
this register holds the weekday alarm information coded in BCD format
2 to 0
alarm
weekdays
8.6.5
Table 22:
CLOCKOUT control register
CLKOUT control (address 0DH) bits description
Bit
Symbol
Value
Description
7
FE
0
the CLKOUT output is inhibited and CLKOUT output is set to high-impedance
1
the CLKOUT output is activated
1 to 0
FD1 and
FD0
these bits control the frequency output at pin CLKOUT, see Table 23
Table 23:
8.6.6
FD1 and FD0: CLKOUT frequency selection
FD1
FD0
CLKOUT frequency
0
0
32.768 kHz
0
1
1024 Hz
1
0
32 Hz
1
1
1 Hz
Countdown timer
The timer register is an 8-bit binary countdown timer. It is enabled and disabled via
the timer control register bit TE. The source clock for the timer is also selected by the
timer control register. Other timer properties such as interrupt generation are
controlled via control/status 2 register.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
9 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
For accurate read back of the countdown value, the I2C-bus clock (SCL) must be
operating at a frequency of at least twice the selected timer clock.
Table 24:
Timer control (address 0EH) bits description
Bit
Symbol
Value
Description
7
TE
0
timer is disabled
1
timer is enabled
1 to 0
TD1 and
TD0
timer source clock frequency select; these bits determine the source clock for the
countdown timer, see Table 25; when not in use, TD1 and TD0 should be set to
1⁄ Hz for power saving
16
Table 25:
Table 26:
TD1 and TD0: Timer frequency selection
TD1
TD0
TIMER Source clock frequency
0
0
4096 Hz
0
1
64 Hz
1
0
1 Hz
1
1
1⁄
60
Hz
Timer (address 0FH) bits description
Bit
Symbol
Value
Description
7 to 0
timer
00 to FF
n
countdown value = n; CountdownPeriod = --------------------------------------------------------------SourceClockFrequency
8.7 EXT_CLK test mode
A test mode is available which allows for on-board testing. In such a mode it is
possible to set up test conditions and control the operation of the RTC.
The test mode is entered by setting bit TEST1 in control/status1 register. Then
pin CLKOUT becomes an input. The test mode replaces the internal 64 Hz signal
with the signal applied to pin CLKOUT. Every 64 positive edges applied to
pin CLKOUT will then generate an increment of one second.
The signal applied to pin CLKOUT should have a minimum pulse width of 300 ns and
a minimum period of 1000 ns. The internal 64 Hz clock, now sourced from CLKOUT,
is divided down to 1 Hz by a 26 divide chain called a pre-scaler. The pre-scaler can be
set into a known state by using bit STOP. When bit STOP is set, the pre-scaler is
reset to 0 (STOP must be cleared before the pre-scaler can operate again).
From a STOP condition, the first 1 second increment will take place after 32 positive
edges on CLKOUT. Thereafter, every 64 positive edges will cause a 1 second
increment.
Remark: Entry into EXT_CLK test mode is not synchronized to the internal 64 Hz
clock. When entering the test mode, no assumption as to the state of the pre-scaler
can be made.
Operation example:
1. Set EXT_CLK test mode (control/status 1, bit TEST1 = 1)
2. Set STOP (control/status 1, bit STOP = 1)
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
10 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
3. Clear STOP (control/status 1, bit STOP = 0)
4. Set time registers to desired value
5. Apply 32 clock pulses to CLKOUT
6. Read time registers to see the first change
7. Apply 64 clock pulses to CLKOUT
8. Read time registers to see the second change.
Repeat 7 and 8 for additional increments.
8.8 Power-On Reset (POR) override
The POR duration is directly related to the crystal oscillator start-up time. Due to the
long start-up times experienced by these types of circuits, a mechanism has been
built in to disable the POR and hence speed up on-board test of the device. The
setting of this mode requires that the I2C-bus pins, SDA and SCL, be toggled in a
specific order as shown in Figure 5. All timings are required minimums.
Once the override mode has been entered, the device immediately stops being reset
and normal operation may commence i.e. entry into the EXT_CLK test mode via
I2C-bus access. The override mode may be cleared by writing a logic 0 to TESTC.
TESTC must be set to logic 1 before re-entry into the override mode is possible.
Setting TESTC to logic 0 during normal operation has no effect except to prevent
entry into the POR override mode.
500 ns
handbook, full pagewidth
2000 ns
SDA
SCL
8 ms
power up
override active
MGM664
Fig 5. POR override sequence.
9. Characteristics of the I2C-bus
The I2C-bus is for bidirectional, two-line communication between different ICs or
modules. The two lines are a serial data line (SDA) and a serial clock line (SCL). Both
lines must be connected to a positive supply via a pull-up resistor. Data transfer may
be initiated only when the bus is not busy.
9.1 Bit transfer
One data bit is transferred during each clock pulse. The data on the SDA line must
remain stable during the HIGH period of the clock pulse as changes in the data line at
this time will be interpreted as a control signal (see Figure 6).
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
11 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
SDA
SCL
data line
stable;
data valid
change
of data
allowed
MBC621
Fig 6. Bit transfer.
9.2 Start and stop conditions
Both data and clock lines remain HIGH when the bus is not busy. A HIGH-to-LOW
transition of the data line, while the clock is HIGH is defined as the start condition (S).
A LOW-to-HIGH transition of the data line while the clock is HIGH is defined as the
stop condition (P), see Figure 7.
SDA
SDA
SCL
SCL
S
P
START condition
STOP condition
MBC622
Fig 7. Definition of start and stop conditions.
9.3 System configuration
A device generating a message is a transmitter, a device receiving a message is the
receiver. The device that controls the message is the master and the devices which
are controlled by the master are the slaves (see Figure 8).
SDA
SCL
MASTER
TRANSMITTER /
RECEIVER
SLAVE
RECEIVER
SLAVE
TRANSMITTER /
RECEIVER
MASTER
TRANSMITTER
MASTER
TRANSMITTER /
RECEIVER
MBA605
Fig 8. System configuration.
9.4 Acknowledge
The number of data bytes transferred between the start and stop conditions from
transmitter to receiver is unlimited. Each byte of eight bits is followed by an
acknowledge bit. The acknowledge bit is a HIGH-level signal put on the bus by the
transmitter during which time the master generates an extra acknowledge related
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
12 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
clock pulse. A slave receiver which is addressed must generate an acknowledge after
the reception of each byte. Also a master receiver must generate an acknowledge
after the reception of each byte that has been clocked out of the slave transmitter.
The device that acknowledges must pull down the SDA line during the acknowledge
clock pulse, so that the SDA line is stable LOW during the HIGH period of the
acknowledge related clock pulse (set-up and hold times must be taken into
consideration). A master receiver must signal an end of data to the transmitter by not
generating an acknowledge on the last byte that has been clocked out of the slave. In
this event the transmitter must leave the data line HIGH to enable the master to
generate a stop condition.
DATA OUTPUT
BY TRANSMITTER
not acknowledge
DATA OUTPUT
BY RECEIVER
acknowledge
SCL FROM
MASTER
1
2
8
9
S
clock pulse for
acknowledgement
START
condition
MBC602
Fig 9. Acknowledgement on the I2C-bus.
9.5 I2C-bus protocol
9.5.1
Addressing
Before any data is transmitted on the I2C-bus, the device which should respond is
addressed first. The addressing is always carried out with the first byte transmitted
after the start procedure.
The PCA8565 acts as a slave receiver or slave transmitter. Therefore the clock signal
SCL is only an input signal, but the data signal SDA is a bidirectional line.
The PCA8565 slave address is shown in Figure 10.
1
0
1
group 1
0
0
0
1
R/W
group 2
MCE189
Fig 10. Slave address.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
13 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
9.5.2
Clock/calendar read/write cycles
The I2C-bus configuration for the different PCA8565 read and write cycles is shown in
Figure 11, Figure 12 and Figure 13. The word address is a 4-bit value that defines
which register is to be accessed next. The upper four bits of the word address are not
used.
acknowledgement
from slave
acknowledgement
from slave
S
SLAVE ADDRESS
0 A
WORD ADDRESS
A
acknowledgement
from slave
DATA
R/W
A
P
n bytes
auto increment
memory word address
MBD822
Fig 11. Master transmits to slave receiver (write mode).
acknowledgement
from slave
acknowledgement
from slave
S
SLAVE ADDRESS
0 A
WORD ADDRESS
A
S
acknowledgement
from slave
SLAVE ADDRESS
R/W
acknowledgement
from master
DATA
1 A
A
n bytes
R/W
at this moment master transmitter
becomes master receiver and
PCA8565 slave receiver
becomes slave transmitter
auto increment
memory word address
no acknowledgement
from master
DATA
1
P
last byte
auto increment
memory word address
MCE172
Fig 12. Master reads after setting word address (write word address; read data).
acknowledgement
from master
acknowledgement
from slave
handbook, full pagewidth
S
SLAVE ADDRESS
1 A
R/W
DATA
A
n bytes
no acknowledgement
from master
DATA
1
P
last byte
auto increment
word address
auto increment
word address
MGL665
Fig 13. Master reads slave immediately after first byte (read mode).
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
14 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
10. Limiting values
Table 27: Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
Min
Max
Unit
VDD
supply voltage
−0.5
+6.5
V
IDD
supply current
−50
+50
mA
ISS
supply current
−50
+50
mA
VI
input voltage
for pins SCL and SDA
−0.5
+5.5
V
for any other input
−0.5
VDD + 0.5
V
II
DC input current
−10
+10
mA
IO
DC output current
−10
+10
mA
Ptot
total power dissipation
-
300
mW
Tamb
ambient temperature
−40
+125
°C
Tstg
storage temperature
−65
+150
°C
11. Static characteristics
Table 28: Static characteristics
VDD = 1.8 to 5.5 V; VSS = 0 V; Tamb = −40 to +125 °C; fosc = 32.768 kHz; quartz Rs = 40 kΩ; CL = 8 pF; unless otherwise
specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Supplies
VDD
supply voltage
1.8
-
5.5
V
VDD(clock)
supply voltage for clock
data integrity
Vlow
-
5.5
V
IDD1
supply current 1
fSCL = 400 kHz
-
-
820
µA
fSCL = 100 kHz
-
-
220
µA
IDD2
supply current 2
interface active
interface inactive (fSCL = 0 Hz);
CLKOUT disabled;
Tamb = 25 °C
[1]
VDD = 5.0 V
-
750
1500
nA
VDD = 4.0 V
-
700
1400
nA
VDD = 3.0 V
-
650
1300
nA
-
600
1200
nA
-
750
5000
nA
VDD = 2.0 V
VDD = 5.0 V; Tamb = 125 °C
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
[2]
Rev. 01 — 31 March 2003
15 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
Table 28: Static characteristics…continued
VDD = 1.8 to 5.5 V; VSS = 0 V; Tamb = −40 to +125 °C; fosc = 32.768 kHz; quartz Rs = 40 kΩ; CL = 8 pF; unless otherwise
specified.
Symbol
IDD3
Parameter
supply current 3
Conditions
interface inactive (fSCL = 0 Hz);
CLKOUT enabled at 32 kHz;
Tamb = 25 °C
Min
Typ
Max
Unit
[3]
VDD = 5.0 V
-
1000
2000
nA
VDD = 4.0 V
-
900
1800
nA
VDD = 3.0 V
-
800
1600
nA
-
700
1400
nA
-
1000
6000
nA
VDD = 2.0 V
VDD = 5.0 V;Tamb = 125 °C
[2]
Inputs
VIL
LOW-level input voltage
VSS − 0.3
-
0.3VDD
V
VIH(SCL)
SCL HIGH-level input
voltage
0.7VDD
-
5.5
V
VIH(SDA)
SDA HIGH-level input
voltage
0.7VDD
-
5.5
V
VIH(OSCI)
OSCI HIGH-level input
voltage
0.7VDD
-
VDD + 0.3
V
ILI(SCL)
SCL input leakage current VI = VDD or VSS
−1
0
+1
µA
ILI(SDA)
SDA input leakage current VI = VDD or VSS
−1
0
+1
µA
Ci
input capacitance
-
-
7
pF
[4]
Outputs
IOL(SDA)
SDA LOW-level output
current
VOL = 0.4 V; VDD = 5 V
−3
-
-
mA
IOL(INT)
INT LOW-level output
current
VOL = 0.4 V; VDD = 5 V
−1
-
-
mA
IOL(CLKOUT)
CLKOUT LOW-level
output current
VO = VDD or VSS
−1
-
-
mA
ILO
output leakage current
−1
0
+1
µA
low voltage detection
-
0.9
1.7
V
ambient temperature
−40
+125
°C
Voltage detector
Vlow
Temperature
Tamb
[1]
[2]
[3]
[4]
Timer source clock = 1⁄60 Hz, level of pins SCL and SDA is VDD or VSS.
Worst case is at high temperature and high supply voltage.
Timer source clock = 1⁄60 Hz, level of pins SCL and SDA is VDD or VSS.
Tested on sample basis.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
16 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
12. Dynamic characteristics
Table 29: Dynamic characteristics
VDD = 1.8 to 5.5 V; VSS = 0 V; Tamb = −40 to + 125 °C; fosc = 32.768 kHz; quartz Rs = 40 kΩ; CL = 8 pF; unless otherwise
specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
15
25
35
pF
-
2 × 10-7
-
-
Oscillator
CINT
integrated load
capacitance
∆fosc/fosc
oscillator stability
∆VDD = 200 mV; Tamb = 25 °C
Quartz crystal parameters (f = 32.768 kHz)
Rs
series resistance
-
-
40
kΩ
CL
parallel load capacitance
-
10
-
pF
CT
trimmer capacitance
5
-
25
pF
[1]
-
50
-
%
[4]
-
-
400
kHz
CLKOUT output
δCLKOUT
CLKOUT duty cycle
Timing characteristics:
I2C-bus[2][3]
fSCL
SCL clock frequency
tHD;STA
START condition hold time
0.6
-
-
µs
tSU;STA
set-up time for a repeated
START condition
0.6
-
-
µs
tLOW
SCL LOW time
1.3
-
-
µs
tHIGH
SCL HIGH time
0.6
-
-
µs
tr
SCL and SDA rise time
-
-
0.3
µs
tf
SCL and SDA fall time
-
-
0.3
µs
Cb
capacitive bus line load
-
-
400
pF
tSU;DAT
data set-up time
100
-
-
ns
tHD;DAT
data hold time
0
-
-
ns
tSU;STO
set-up time for STOP
condition
0.6
-
-
µs
tSW
tolerable spike width on
bus
-
-
50
ns
[1]
[2]
[3]
[4]
Unspecified for fCLKOUT = 32.768 kHz.
All timing values are valid within the operating supply voltage at ambient temperature and referenced to VIL and VIH with an input voltage
swing of VSS to VDD.
A detailed description of the I2C-bus specification, with applications, is given in brochure The I2C-bus and how to use it. This brochure
may be ordered using the code 9398 393 40011.
I2C-bus access time between two STARTs or between a START and a STOP condition to this device must be less than one second.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
17 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
SDA
t BUF
tf
t LOW
SCL
t HD;STA
t HD;DAT
tr
t SU;DAT
t HIGH
SDA
t SU;STA
MGA728
t SU;STO
Fig 14. I2C-bus timing waveforms.
MLD970
1.5
IDD
(µA)
IDD
(µA)
1
1
0.5
0.5
0
0
0
2
4
VDD (V)
6
Tamb = 25 °C; Timer = 1 minute.
0
2
4
VDD (V)
6
Tamb = 25 °C; Timer = 1 minute.
Fig 15. IDD as a function of VDD; CLKOUT disabled.
Fig 16. IDD as a function of VDD; CLKOUT = 32 kHz.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
MLD971
1.5
Rev. 01 — 31 March 2003
18 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
MLD972
1.5
MLD973
4
IDD
(µA)
frequency
deviation
(ppm) 2
1
0
0.5
−2
−4
0
−40
0
40
80
120
160
0
T (°C)
2
4
VDD (V)
6
Tamb = 25 °C; normalized to VDD = 3 V.
VDD = 3 V; Timer = 1 minute.
Fig 17. IDD as a function of T; CLKOUT = 32 kHz.
Fig 18. Frequency deviation as a function of VDD.
13. Application information
VDD
SDA
1 µF
SCL
VDD
MASTER
TRANSMITTER/
RECEIVER
SCL
CLOCK CALENDAR
OSCI
PCA8565
OSCO
VSS
SDA
VDD
R
SDA SCL
(I2C-bus)
R
R: pull-up resistor
tr
R=
Cb
MCE168
Fig 19. Application diagram.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
19 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
13.1 Quartz frequency adjustment
13.1.1
Method 1: fixed OSCI capacitor
By evaluating the average capacitance necessary for the application layout, a fixed
capacitor can be used. The frequency is best measured via the 32.768 kHz signal
available after power-on at pin CLKOUT. The frequency tolerance depends on the
quartz crystal tolerance, the capacitor tolerance and the device-to-device tolerance
(on average ±5 × 10−6). Average deviations of ±5 minutes per year can be easily
achieved.
13.1.2
Method 2: OSCI trimmer
Using the 32.768 kHz signal available after power-on at pin CLKOUT, fast setting of a
trimmer is possible.
13.1.3
Method 3: OSCO output
Direct measurement of OSCO out (accounting for test probe capacitance).
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
20 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
14. Package outline
TSSOP8: plastic thin shrink small outline package; 8 leads; body width 3 mm
D
E
SOT505-1
A
X
c
y
HE
v M A
Z
5
8
A2
pin 1 index
(A3)
A1
A
θ
Lp
L
1
4
detail X
e
w M
bp
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D(1)
E(2)
e
HE
L
Lp
v
w
y
Z(1)
θ
mm
1.10
0.15
0.05
0.95
0.80
0.25
0.45
0.25
0.28
0.15
3.10
2.90
3.10
2.90
0.65
5.10
4.70
0.94
0.70
0.40
0.1
0.1
0.1
0.70
0.35
6°
0°
Notes
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
REFERENCES
IEC
JEDEC
EIAJ
EUROPEAN
PROJECTION
ISSUE DATE
99-04-09
SOT505-1
Fig 20. Package outline.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
21 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
15. Soldering
15.1 Introduction to soldering surface mount packages
This text gives a very brief insight to a complex technology. A more in-depth account
of soldering ICs can be found in our Data Handbook IC26; Integrated Circuit
Packages (document order number 9398 652 90011).
There is no soldering method that is ideal for all surface mount IC packages. Wave
soldering can still be used for certain surface mount ICs, but it is not suitable for fine
pitch SMDs. In these situations reflow soldering is recommended.
15.2 Reflow soldering
Reflow soldering requires solder paste (a suspension of fine solder particles, flux and
binding agent) to be applied to the printed-circuit board by screen printing, stencilling
or pressure-syringe dispensing before package placement.
Several methods exist for reflowing; for example, convection or convection/infrared
heating in a conveyor type oven. Throughput times (preheating, soldering and
cooling) vary between 100 and 200 seconds depending on heating method.
Typical reflow peak temperatures range from 215 to 250 °C. The top-surface
temperature of the packages should preferably be kept:
• below 220 °C for all the BGA packages and packages with a thickness ≥ 2.5mm
and packages with a thickness <2.5 mm and a volume ≥350 mm3 so called
thick/large packages
• below 235 °C for packages with a thickness <2.5 mm and a volume <350 mm3 so
called small/thin packages.
15.3 Wave soldering
Conventional single wave soldering is not recommended for surface mount devices
(SMDs) or printed-circuit boards with a high component density, as solder bridging
and non-wetting can present major problems.
To overcome these problems the double-wave soldering method was specifically
developed.
If wave soldering is used the following conditions must be observed for optimal
results:
• Use a double-wave soldering method comprising a turbulent wave with high
upward pressure followed by a smooth laminar wave.
• For packages with leads on two sides and a pitch (e):
– larger than or equal to 1.27 mm, the footprint longitudinal axis is preferred to be
parallel to the transport direction of the printed-circuit board;
– smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the
transport direction of the printed-circuit board.
The footprint must incorporate solder thieves at the downstream end.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
22 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
• For packages with leads on four sides, the footprint must be placed at a 45° angle
to the transport direction of the printed-circuit board. The footprint must
incorporate solder thieves downstream and at the side corners.
During placement and before soldering, the package must be fixed with a droplet of
adhesive. The adhesive can be applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the adhesive is cured.
Typical dwell time is 4 seconds at 250 °C. A mildly-activated flux will eliminate the
need for removal of corrosive residues in most applications.
15.4 Manual soldering
Fix the component by first soldering two diagonally-opposite end leads. Use a low
voltage (24 V or less) soldering iron applied to the flat part of the lead. Contact time
must be limited to 10 seconds at up to 300 °C.
When using a dedicated tool, all other leads can be soldered in one operation within
2 to 5 seconds between 270 and 320 °C.
15.5 Package related soldering information
Table 30:
Suitability of surface mount IC packages for wave and reflow soldering
methods
Package[1]
Soldering method
BGA, LBGA, LFBGA, SQFP, TFBGA, VFBGA
DHVQFN, HBCC, HBGA, HLQFP, HSQFP,
HSOP, HTQFP, HTSSOP, HVQFN, HVSON,
SMS
Reflow[2]
not suitable
suitable
not
suitable[3]
suitable
PLCC[4], SO, SOJ
suitable
suitable
LQFP, QFP, TQFP
not recommended[4][5]
suitable
SSOP, TSSOP, VSO, VSSOP
[1]
[2]
[3]
[4]
[5]
[6]
not
recommended[6]
suitable
For more detailed information on the BGA packages refer to the (LF)BGA Application Note
(AN01026); order a copy from your Philips Semiconductors sales office.
All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the
maximum temperature (with respect to time) and body size of the package, there is a risk that internal
or external package cracks may occur due to vaporization of the moisture in them (the so called
popcorn effect). For details, refer to the Drypack information in the Data Handbook IC26; Integrated
Circuit Packages; Section: Packing Methods.
These packages are not suitable for wave soldering. On versions with the heatsink on the bottom
side, the solder cannot penetrate between the printed-circuit board and the heatsink. On versions with
the heatsink on the top side, the solder might be deposited on the heatsink surface.
If wave soldering is considered, then the package must be placed at a 45° angle to the solder wave
direction. The package footprint must incorporate solder thieves downstream and at the side corners.
Wave soldering is suitable for LQFP, QFP and TQFP packages with a pitch (e) larger than 0.8 mm; it
is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm.
Wave soldering is suitable for SSOP and TSSOP packages with a pitch (e) equal to or larger than
0.65 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm.
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Wave
Rev. 01 — 31 March 2003
23 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
16. Revision history
Table 31:
Revision history
Rev Date
01
20030331
CPCN
Description
-
Product data (9397 750 10695)
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Product data
Rev. 01 — 31 March 2003
24 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
17. Data sheet status
Level
Data sheet status[1]
Product status[2][3]
Definition
I
Objective data
Development
This data sheet contains data from the objective specification for product development. Philips
Semiconductors reserves the right to change the specification in any manner without notice.
II
Preliminary data
Qualification
This data sheet contains data from the preliminary specification. Supplementary data will be published
at a later date. Philips Semiconductors reserves the right to change the specification without notice, in
order to improve the design and supply the best possible product.
III
Product data
Production
This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply. Relevant
changes will be communicated via a Customer Product/Process Change Notification (CPCN).
[1]
Please consult the most recently issued data sheet before initiating or completing a design.
[2]
The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at
URL http://www.semiconductors.philips.com.
[3]
For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
18. Definitions
customers using or selling these products for use in such applications do so
at their own risk and agree to fully indemnify Philips Semiconductors for any
damages resulting from such application.
Short-form specification — The data in a short-form specification is
extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Right to make changes — Philips Semiconductors reserves the right to
make changes in the products - including circuits, standard cells, and/or
software - described or contained herein in order to improve design and/or
performance. When the product is in full production (status ‘Production’),
relevant changes will be communicated via a Customer Product/Process
Change Notification (CPCN). Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no
licence or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are
free from patent, copyright, or mask work right infringement, unless otherwise
specified.
Limiting values definition — Limiting values given are in accordance with
the Absolute Maximum Rating System (IEC 60134). Stress above one or
more of the limiting values may cause permanent damage to the device.
These are stress ratings only and operation of the device at these or at any
other conditions above those given in the Characteristics sections of the
specification is not implied. Exposure to limiting values for extended periods
may affect device reliability.
Application information — Applications that are described herein for any
of these products are for illustrative purposes only. Philips Semiconductors
make no representation or warranty that such applications will be suitable for
the specified use without further testing or modification.
19. Disclaimers
20. Licenses
Purchase of Philips I2C components
Life support — These products are not designed for use in life support
appliances, devices, or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors
Purchase of Philips I2C components conveys a license
under the Philips’ I2C patent to use the components in the
I2C system provided the system conforms to the I2C
specification defined by Philips. This specification can be
ordered using the code 9398 393 40011.
Contact information
For additional information, please visit http://www.semiconductors.philips.com.
For sales office addresses, send e-mail to: [email protected]
Product data
Fax: +31 40 27 24825
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
9397 750 10695
Rev. 01 — 31 March 2003
25 of 26
PCA8565
Philips Semiconductors
Real time clock/calender
Contents
1
2
3
4
5
6
7
7.1
7.2
8
8.1
8.2
8.3
8.4
8.5
8.6
8.6.1
8.6.2
8.6.3
8.6.4
8.6.5
8.6.6
8.7
8.8
9
9.1
9.2
9.3
9.4
9.5
9.5.1
9.5.2
10
11
12
13
13.1
13.1.1
13.1.2
13.1.3
14
15
15.1
15.2
15.3
15.4
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Quick reference data . . . . . . . . . . . . . . . . . . . . . 1
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Pinning information . . . . . . . . . . . . . . . . . . . . . . 2
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3
Functional description . . . . . . . . . . . . . . . . . . . 3
Alarm function modes. . . . . . . . . . . . . . . . . . . . 4
Timer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
CLKOUT output . . . . . . . . . . . . . . . . . . . . . . . . 4
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Voltage-low detector . . . . . . . . . . . . . . . . . . . . . 4
Register organization . . . . . . . . . . . . . . . . . . . . 5
Control/status 1 register . . . . . . . . . . . . . . . . . . 6
Control/status 2 register . . . . . . . . . . . . . . . . . . 6
Time and date registers . . . . . . . . . . . . . . . . . . 7
Alarm registers . . . . . . . . . . . . . . . . . . . . . . . . . 8
CLOCKOUT control register . . . . . . . . . . . . . . . 9
Countdown timer. . . . . . . . . . . . . . . . . . . . . . . . 9
EXT_CLK test mode . . . . . . . . . . . . . . . . . . . . 10
Power-On Reset (POR) override . . . . . . . . . . 11
Characteristics of the I2C-bus. . . . . . . . . . . . . 11
Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Start and stop conditions . . . . . . . . . . . . . . . . 12
System configuration . . . . . . . . . . . . . . . . . . . 12
Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 12
I2C-bus protocol . . . . . . . . . . . . . . . . . . . . . . . 13
Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Clock/calendar read/write cycles . . . . . . . . . . 14
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 15
Static characteristics. . . . . . . . . . . . . . . . . . . . 15
Dynamic characteristics . . . . . . . . . . . . . . . . . 17
Application information. . . . . . . . . . . . . . . . . . 19
Quartz frequency adjustment . . . . . . . . . . . . . 20
Method 1: fixed OSCI capacitor . . . . . . . . . . . 20
Method 2: OSCI trimmer. . . . . . . . . . . . . . . . . 20
Method 3: OSCO output . . . . . . . . . . . . . . . . . 20
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 21
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Introduction to soldering surface mount
packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Reflow soldering . . . . . . . . . . . . . . . . . . . . . . . 22
Wave soldering . . . . . . . . . . . . . . . . . . . . . . . . 22
Manual soldering . . . . . . . . . . . . . . . . . . . . . . 23
© Koninklijke Philips Electronics N.V. 2003.
Printed in The Netherlands
All rights are reserved. Reproduction in whole or in part is prohibited without the prior
written consent of the copyright owner.
The information presented in this document does not form part of any quotation or
contract, is believed to be accurate and reliable and may be changed without notice. No
liability will be accepted by the publisher for any consequence of its use. Publication
thereof does not convey nor imply any license under patent- or other industrial or
intellectual property rights.
Date of release: 31 March 2003
Document order number: 9397 750 10695
15.5
16
17
18
19
20
Package related soldering information . . . . . .
Revision history . . . . . . . . . . . . . . . . . . . . . . .
Data sheet status. . . . . . . . . . . . . . . . . . . . . . .
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . .
Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23
24
25
25
25
25