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PCA9536DP 데이터시트 PDF




NXP Semiconductors에서 제조한 전자 부품 PCA9536DP은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 PCA9536DP 자료 제공

부품번호 PCA9536DP 기능
기능 4-bit I2C and SMBus I/O port
제조업체 NXP Semiconductors
로고 NXP Semiconductors 로고


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PCA9536DP 데이터시트, 핀배열, 회로
INTEGRATED CIRCUITS
PCA9536
4-bit I2C and SMBus I/O port
Objective data sheet
2004 Aug 20
Philips
Semiconductors




PCA9536DP pdf, 반도체, 판매, 대치품
Philips Semiconductors
4-bit I2C and SMBus I/O port
Objective data sheet
PCA9536
REGISTERS
Command Byte
Command
Protocol
Function
0
Read byte
Input port register
1 Read/write byte Output port register
2 Read/write byte Polarity inversion register
3 Read/write byte Configuration register
The command byte is the first byte to follow the address byte during
a write transmission. It is used as a pointer to determine which of the
following registers will be written or read.
Register 0 – Input Port Register
bit X X X X I3 I2 I1 I0
default 1 1 1 1 1 1 1 1
This register is a read only port. It reflects the incoming logic levels
of the pins, regardless of whether the pin is defined as an input or an
output by Register 3. Writes to this register have no effect.
“X” are “don’t care” bits and can be programmed with either “0”
or “1”.
Register 1 – Output Port Register
bit X X X X O3 O2 O1 O0
default 1 1 1 1 1 1 1 1
This register reflects the outgoing logic levels of the pins defined as
outputs by Register 3. Bit values in this register have no effect on
pins defined as inputs. Reads from this register return the value that
is in the flip-flop controlling the output selection, NOT the actual pin
value.
“X” are “don’t care” bits and can be programmed with either “0”
or “1”.
Register 2 – Polarity Inversion Register
bit X X X X N3 N2 N1 N0
default 0 0 0 0 0 0 0 0
This register allows the user to invert the polarity of the Input Port
Register data. If a bit in this register is set (written with ‘1’), the
corresponding Input Port data is inverted. If a bit in this register is
cleared (written with a ‘0’), the Input Port data polarity is retained.
“X” are “don’t care” bits and can be programmed with either “0”
or “1”.
Register 3 – Configuration Register
bit X X X X C3 C2 C1 C0
default 1 1 1 1 1 1 1 1
This register configures the directions of the I/O pins. If a bit in this
register is set, the corresponding port pin is enabled as an input with
high impedance output driver. If a bit in this register is cleared, the
corresponding port pin is enabled as an output. At reset, the I/Os are
configured as inputs with a weak pull-up to VDD.
“X” are “don’t care” bits and can be programmed with either “0”
or “1”.
Power-on Reset
When power is applied to VDD, an internal power-on reset holds the
PCA9536 in a reset condition until VDD has reached VPOR. At that
point, the reset condition is released and the PCA9536 registers and
state machine will initialize to their default states. Thereafter, VDD
must be lowered below 0.2 V to reset the device.
For a power reset cycle, VDD must be lowered below 0.2 V and then
restored to the operating voltage.
2004 Aug 20
4

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PCA9536DP 전자부품, 판매, 대치품
Philips Semiconductors
4-bit I2C and SMBus I/O port
Objective data sheet
PCA9536
slave address
acknowledge
from slave
S1 0 0 0 0 0 1 0 A
R/W
acknowledge
from slave
slave address
acknowledge
from slave
acknowledge
data from register from master
COMMAND BYTE
A S 1 0 0 0 0 0 11 A
at this moment master-transmitter
becomes master-receiver and
slave-receiver becomes
slave-transmitter
R/W
DATA
first byte
A
data from register
no acknowledge
from master
Figure 7. READ from register
DATA
last byte
NA P
SW02196
SCL
SDA
READ FROM
PORT
1 2345 6 78 9
slave address
data from port
S1 00 00 01 1 A
start condition
R/W acknowledge
from slave
DATA 1
data from port
A
acknowledge
from master
DATA 4
NA P
no acknowledge
from master
stop
condition
DATA INTO
PORT
DATA 2
DATA 3
tph tps
NOTES:
1. This figure assumes the command byte has previously been programmed with 00h.
2. Transfer of data can be stopped at any moment by a stop condition.
Figure 8. READ input port register
DATA 4
SW02197
2004 Aug 20
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관련 데이터시트

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4-bit I2C and SMBus I/O port

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PCA9536DP

4-bit I2C and SMBus I/O port

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