參數(shù)資料
型號(hào)： MAX9850
廠商： Maxim Integrated Products, Inc.
英文描述： Stereo Audio DAC with DirectDrive Headphone Amplifier
中文描述： 立體聲音頻DAC，帶有DirectDrive®耳機(jī)放大器
文件頁(yè)數(shù)： 22/36頁(yè)
文件大小： 956K
代理商： MAX9850
M
Alert Flag (ALERT)
1 = An interrupt event has occurred.
0 = No interrupt event has occurred.
ALERT is an alert flag that sets when an interrupt event
has occurred. The events that can be programmed to
set ALERT are as follows:
A change in state on SGPIO indicating a change in
levels at GPIO when GPIO is configured as an input.
Configure GPIO as an input and set ISGPIO = 1 in
the interrupt enable register (register 0x4, bit B6).
The internal PLL locks or unlocks with LRCLK. Set
ILCK = 1 in the interrupt enable register (register
0x4, bit B5).
A change in state on SHPS indicating headphones
have been connected or disconnected. Set ISHPS =
1 in the interrupt enable register (register 0x4, bit B4).
The headphone amplifier reaches its minimum vol-
ume. Set IVMN = 1 in the interrupt enable register
(register 0x4, bit B3).
An overload on either right or left headphone out-
puts (HPR, HPL). Set IIOH = 1 in the interrupt
enable register (register 0x4, bit B0).
ALERT sets to 1 after an event occurs and remains set
until the status A register is read. GPIO configured as an
output can interrupt a μC on an ALERT event. GM(1:0) in
the GPIO register (register 0x3, bits B7 and B6) control
the output mode of GPIO. See the
GPIO
section for more
information on programming GPIO as an output.
GPIO Status (SGPIO)
1 = GPIO is high.
0 = GPIO is low.
SGPIO reports the status of GPIO at the time that status
A is read, regardless of whether GPIO is programmed
as an input or output. A change in state on SGPIO
causes ALERT to set to 1 when GPIO is configured as
an input and ISGPIO = 1 in the interrupt enable register
(register 0x4, bit B6).
PLL Lock Status (LCK)
1 = The internal PLL is locked with LRCLK.
0 = The internal PLL is not locked with LRCLK.
LCK reports the lock status of the internal PLL at the
time that STATUS A is read. The DAC is disabled when
the PLL is not locked. When the PLL is locked with
LRCLK, the DAC will become operational if DACEN is
equal to 1 (register 0x5, bit B0). ALERT sets to 1 when
LCK changes state if ILCK = 1 in the interrupt enable
register (register 0x4, bit B5).
HPS Status (SHPS)
1 = HPS is low, indicating that headphones are con-
nected.
0 = HPS is high, indicating no headphone is connected.
SHPS reports the debounced status of HPS at the time
STATUS A is read. SHPS = 0 indicates that no head-
phone is connected and HPS is high. SHPS sets to 1
when HPS is low, indicating headphones are connected.
ALERT sets to 1 when SHPS changes state, if ISHPS = 1
in the interrupt enable register (register 0x4, bit B4).
Volume at Minimum (VMN)
1 = Headphone volume has reached its minimum volume.
0 = Headphone volume is not at its minimum.
VMN sets to 1 when the minimum headphone amplifier
volume has been reached. ALERT sets to 1 when IVMN
= 1 in the interrupt enable register (register 0x4, bit B3).
Headphone Overcurrent Left (IOHL)
1 = The left headphone output (HPL) has experienced
an overcurrent condition.
0 = The left headphone output (HPL) is operating normally.
IOHL sets to 1, when an overcurrent occurs on the left
headphone output HPL and remains set until status A is
read. ALERT sets to 1 when an overcurrent on the right
or left headphone output occurs if IIOH = 1 in the inter-
rupt enable register (register 0x4, bit B0).
Headphone Overcurrent Right (IOHR)
1 = The right headphone output (HPR) has experi-
enced an overcurrent condition.
0 = The right headphone output (HPR) is operating normally.
IOHR sets to 1 and remains set until STATUS A is read.
ALERT sets to 1 when an overcurrent on the right or left
headphone output occurs if IIOH = 1 in the interrupt
enable register (register 0x4, bit B0).
Stereo Audio DAC with DirectDrive
Headphone Amplifier
22
______________________________________________________________________________________
Table 10. Status A (0x0) Read-Only, Bit
Descriptions
B7
B6
B5
LCK
B4
SHPS
B3
VMN
B2
1
B1
IOHL
B0
IOHR
ALERT SGPIO
相關(guān)PDF資料
PDF描述
MAX9850ETI Stereo Audio DAC with DirectDrive Headphone Amplifier
MAX9995ETX-D Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch
MAX9995ETX-T Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch
MAX9995ETX-TD Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch
MAX9995ETX Dual, SiGe, High-Linearity, 1700MHz to 2200MHz Downconversion Mixer with LO Buffer/Switch
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MAX98500EWE+T 功能描述:音頻放大器 2.2W Mono Class D Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
MAX98502EVKIT# 功能描述:放大器 IC 開(kāi)發(fā)工具 MAX98502 Eval Kit RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類(lèi)型:Power Amplifiers 工具用于評(píng)估:IR4302 工作電源電壓:13 V to 23 V
MAX98502EWE+ 功能描述:音頻放大器 Boosted Class D Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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