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參數(shù)資料
| 型號： | MAX7319ATE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 3/16頁 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 16TQFN-EP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 接口： | I²C |
| 輸入/輸出數(shù)： | 8 |
| 中斷輸出： | 是 |
| 頻率 - 時(shí)鐘： | 400kHz |
| 電源電壓： | 1.71 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 16-TQFN-EP（3x3） |
| 包裝： | 帶卷 (TR) |
MAX7319
I2C Port Expander with Eight Inputs and
Maskable Transition Detection
______________________________________________________________________________________
11
SCL
MAX7319 SLAVE ADDRESS
A
0
1
S
P
1
PORTS
INT OUTPUT
R/W
PORT SNAPSHOT
tIV
tPH
tIR
A
I0
I1
I2
I3
I4
I5
I6
I7
D0
D1
D2
D3
D4
D5
D6
D7
PORT SNAPSHOT
tPSU
tIP
F0
F1
F2
F3
F4
F5
F6
F7
D7
D6
D5
D4
D3
D2
D1
D0
N
PORT SNAPSHOT
INT REMAINS HIGH UNTIL STOP CONDITION
S
G
A
L
F
T
P
U
R
E
T
N
I
S
T
U
P
N
I
T
R
O
P
S = START CONDITION
SHADED = SLAVE TRANSMISSION
P = STOP CONDITION
N = NOT ACKNOWLEDGE
Figure 7. Reading from the MAX7319 (2 Data Bytes)
Input port data is sampled during the preceding I2C
acknowledge bit (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 MAX7319 sets the interrupt
mask register, and clears both the internal transition
flags and the
INT output.
A multibyte write to the MAX7319 sets the interrupt
mask register repeatedly.
Reading from the MAX7319
A read from the MAX7319 starts with the master trans-
mitting the MAX7319’s slave address with the R/
W bit
set high. The MAX7319 acknowledges the slave
address and samples the input ports during acknowl-
edge bit.
INT deasserts during the slave address
acknowledge.
Typically, the master reads 1 or 2 bytes from the
MAX7319, with each byte, except the last one, being
acknowledged by the master upon reception.
When the master reads 1 byte from the MAX7319 and
subsequently issues a STOP condition (Figure 6), the
MAX7319 transmits the current port data, clears the
transition flags, and resets the transition detection.
INT
deasserts during the slave address acknowledge. The
new snapshot data is the current port data transmitted
to the master; therefore, port transitions ocurring during
the transmission are detected.
INT remains high until
the STOP condition.
When the master reads 2 bytes from the MAX7319 and
subsequently issues a STOP condition (Figure 7), the
MAX7319 transmits the current port data, followed by
the transition flags. The transition flags are cleared, and
transition detection reset.
INT deasserts during the
slave address acknowledge. The new snapshot data is
the current port data transmitted to the master; there-
fore, port transitions occurring during the transmission
are detected.
INT remains high until the STOP condi-
tion. When the master reads more than 2 bytes, the
input port data alternates with the transition flag.
S = START CONDITION
SHADED = SLAVE TRANSMISSION
P = STOP CONDITION
N = NOT ACKNOWLEDGE
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| MAX731CPA | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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