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參數(shù)資料
| 型號(hào)： | MAX7348AEP+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 3/29頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC KEY SWITCH 2WIRE 20-QSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 應(yīng)用： | 聲卡，播放器，記錄器 |
| 接口： | I²C |
| 電源電壓： | 2.4 V ~ 3.6 V |
| 封裝/外殼： | 20-SSOP（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-QSOP |
| 包裝： | 管件 |
| 安裝類型： | 表面貼裝 |
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MAX7347/MAX7348/MAX7349
2-Wire Interfaced Low-EMI Key Switch
and Sounder Controllers
______________________________________________________________________________________
11
Message Format for Writing the Sounder
Controller
A write to the MAX7347/MAX7348/MAX7349s’ sounder
controller comprises the transmission of the
MAX7347/MAX7348/MAX7349s’ sounder slave address
with the R/W bit set to zero, followed by at least 1 com-
mand byte of information. The sounder controller ana-
lyzes each incoming data byte, and depending on the
state of the sounder controller’s 2-deep FIFO and the
contents of the command byte, the command byte is
added to the FIFO or it overwrites the last FIFO data
item (Table 16).
Message Format for Reading the Sounder
Controller
A read from the MAX7347/MAX7348/MAX7349s’ sounder
controller comprises the transmission of the
MAX7347/MAX7348/MAX7349s’ sounder slave address
with the R/W bit set to 1. The master can now read n con-
secutive bytes from the MAX7347/MAX7348/MAX7349,
each byte being a snapshot of the FIFO status of the
sounder controller (Table 16). If the master wishes to poll
the sounder controller until there is room for another com-
mand to be sent, the master can read bytes continuously
from the sounder controller until the information is satis-
factory and then issue a STOP condition.
Operation with Multiple Masters
If the MAX7347/MAX7348/MAX7349 are operated on a 2-
wire interface with multiple masters, a master reading the
MAX7347/MAX7348/MAX7349 should use a repeated
start between the write that sets the MAX7347/MAX7348/
MAX7349s’ address pointer, and the read(s) that takes
the data from the location(s). This is because it is possi-
ble for master 2 to take over the bus after master 1 has
set up the MAX7347/MAX7348/MAX7349s’ address
pointer but before master 1 has read the data. If master 2
subsequently resets the MAX7347/MAX7348/MAX7349s’
address pointer, then master 1’s read may be from an
unexpected location.
REGISTER
FUNCTION
ADDRESS
CODE (hex)
AUTOINCREMENT
ADDRESS (hex)
Keys FIFO
0x00
Debounce
0x01
0x02
Autorepeat
0x02
0x03
Interrupt
0x03
0x04
Configuration
0x04
0x05
Port
0x05
0x06
Key Sound
0x06
0x07
Alert Sound
0x07
0x00
Table 4. Key-Scan Command Address
Autoincrement Rules
SA
A
P
0
SLAVE ADDRESS
COMMAND BYTE
D7
D6
D5
D4
D3
D2
D1
D0
COMMAND BYTE IS STORED ON RECEIPT OF
ACKNOWLEDGE CONDITION
ACKNOWLEDGE FROM MAX7347/MAX7348/MAX7349
R/W
Figure 7. Command Byte Received
SA
AA
P
0
SLAVE ADDRESS
COMMAND BYTE
DATA BYTE
1 BYTE
AUTOINCREMENT
COMMAND BYTE ADDRESS
D7
D6
D5
D4
D3
D2
D1
D0
D1
D0
D3
D2
D5
D4
D7
D6
ACKNOWLEDGE FROM MAX7347/MAX7348/MAX7349
R/W
Figure 8. Command and Single Data Byte Received
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7348AEP+ | 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI Low-EMI Key Switch & Sounder Controller RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| MAX7348AEP+T | 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI Low-EMI Key Switch & Sounder Controller RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| MAX7348AEP-T | 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI Low-EMI Key Switch & Sounder Controller RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| MAX7349 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:2-Wire Interfaced Low-EMI Key Switch and Sounder Controllers |
| MAX7349AEG | 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI Low-EMI Key Switch & Sounder Controller RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
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