- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98009 > MAX7329AAP+ (MAXIM INTEGRATED PRODUCTS INC) 8 I/O, PIA-GENERAL PURPOSE, PDSO20 PDF資料下載
參數(shù)資料
| 型號： | MAX7329AAP+ |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8 I/O, PIA-GENERAL PURPOSE, PDSO20 |
| 封裝： | 5.30 MM, LEAD FREE, MO150, SSOP-20 |
| 文件頁數(shù)： | 12/13頁 |
| 文件大?。?/td> | 611K |
| 代理商： | MAX7329AAP+ |
MAX7328/MAX7329
The first (A6), second (A5), third (A4), and fourth (A3)
bits of the MAX7328 slave address are always 0, 1, 0,
and 0. Slave address bits A2, A1, and A0 are selected
by the address inputs AD2, AD1, and AD0. These pins
can be connected to GND or V+. The MAX7328 has
eight possible slave addresses (Table 1), and there-
fore, a maximum of eight MAX7328 devices can be
controlled independently from the same interface.
The first (A6), second (A5), third (A4), and fourth (A3)
bits of the MAX7329 slave address are always 0, 1, 1,
and 1. Slave address bits A2, A1, and A0 are selected
by the address inputs AD2, AD1, and AD0. These pins
can be connected to GND or V+. The MAX7329 has
eight possible slave addresses (Table 2), and therefore,
a maximum of eight MAX7329 devices can be controlled
independently from the same interface.
Because the MAX7328 has a different range of slave
address selections than the MAX7329, a total of eight
MAX7328 devices and eight MAX7329 devices can be
connected to the same bus and independently controlled.
Reading and Writing
the MAX7328 and MAX7329
I2C interface access to the MAX7328/MAX7329 is as
follows:
A single-byte read from the MAX7328 or MAX7329
returns the status of the eight ports (with output ports
read back as inputs), and clears the INT output.
A 2-byte read from the MAX7328 or MAX7329 returns
the status of the eight ports (with output ports read
back as inputs) and clears the INT output.
A multibyte read repeatedly returns the input port data.
Input port data is sampled during the preceding I2C
acknowledge bit, which is the acknowledge bit for the
I2C slave address in the case of a single-byte or
2-byte read.
A single-byte write to the MAX7328 or MAX7329 sets
the eight ports to high or low, depending on the data
byte content. Bit locations of a write byte, corresponding
to ports intended for input usage, contain high values.
A multibyte write to the MAX7328 or MAX7329 repeat-
edly sets the logic state of all eight I/O ports.
Reading from the MAX7328
and MAX7329
A read from the MAX7328 or MAX7329 starts with the
master transmitting the MAX7328’s or MAX7329’s slave
address with the R/W bit set high. The MAX7328 or
MAX7329 acknowledges the slave address, and samples
the input ports (takes a snapshot) during acknowledge.
Typically, the master reads 1 or 2 bytes from the MAX7328
or MAX7329, each byte being acknowledged by the mas-
ter on reception, with exception of the last byte.
The master can read 1 byte from the MAX7328 or
MAX7329 and then issue a STOP condition (Figure 8). In
this case, the MAX7328 or MAX7329 transmits the cur-
rent port data, and restarts the transition detection. INT
goes high (high impedance if an external pullup resistor
is not fitted) during the port data-byte acknowledge. The
new snapshot data is the current port data transmitted
to the master, and therefore, any port changes that
I2C Port Expanders with Eight I/O Ports
8
_______________________________________________________________________________________
SCL
MAX7328/MAX7329 SLAVE ADDRESS
SA
P
1
PORT INPUT DATA
INT OUTPUT
R/W
PORT SNAPSHOT DATA
PORT SNAPSHOT TAKEN
S = START CONDITION
SHADED = SLAVE TRANSMISSION
P = STOP CONDITION
N = NOT ACKNOWLEDGE
DATA 1
DATA 2
DATA 3
tIV
tPH
tIR
N
P0
P1
P2
P3
P4
P5
P6
P7
D0
D1
D2
DATA 1
D3
D4
D5
D6
D7
PORT SNAPSHOT TAKEN
tPSU
tIR
tIV
Figure 8. Reading from the MAX7328/MAX7329 (1 Data Byte)
相關PDF資料 |
PDF描述 |
|---|---|
| MAXQ3212-EMX+ | 16-BIT, EEPROM, 3.58 MHz, RISC MICROCONTROLLER, PDIP24 |
| MAXQ613E-0000+ | 16-BIT, FLASH, 12 MHz, RISC MICROCONTROLLER, PQFP32 |
| MAXQ613K-0000+ | 16-BIT, FLASH, 12 MHz, RISC MICROCONTROLLER, PQFP44 |
| MAXQ7667AACM/V+ | 16-BIT, FLASH, 16 MHz, RISC MICROCONTROLLER, PQFP48 |
| MAXQ7667AACM+ | 16-BIT, FLASH, 16 MHz, RISC MICROCONTROLLER, PQFP48 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7329AAP+ | 制造商:Maxim Integrated Products 功能描述:I?C PORT EXPANDERS WITH EIGHT I/O PORTS - Rail/Tube |
| MAX7329AAP+T | 制造商:Maxim Integrated Products 功能描述:I?C PORT EXPANDERS WITH EIGHT I/O PORTS - Tape and Reel |
| MAX7329APP | 制造商:Maxim Integrated Products 功能描述:I2C PORT EXPANDERS WITH EIGHT I/O PORTS - Rail/Tube |
| MAX7329AWE | 功能描述:接口-I/O擴展器 RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7329AWE+ | 功能描述:接口-I/O擴展器 I2C Port Expander w/12 P-P Out & 4 I/O RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復。