MAX14566AEETA 查看數據表（PDF） - Maxim Integrated
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MAX14566AEETA Datasheet PDF : 15 Pages
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USB Host Charger Identification
Analog Switches
with CB1. Connect CB1 to a logic-level low for auto mode
(AM) or connect CB1 to a logic-level high for forced
dedicated-charger mode (FM).
Autodetection
All the devices feature autodetection charger mode for
dedicated chargers and USB masters. CB must be set
low to activate autodetection charger mode.
In autodetection charger mode, the MAX14566E moni-
tors the voltages at DM and DP to determine the type of
the device attached. If the voltage at DM is +2.3V (typ)
or higher and the voltage at DP is +2.3V (typ) or lower,
the voltage stays unchanged.
If the voltage at DM is forced below the +2.3V (typ)
threshold, the internal switch disconnects DM and DP
from the resistor-divider and DP and DM are shorted
together for dedicated charging mode.
If the voltage at DP is forced higher than the +2.3V (typ)
threshold, the internal switch disconnects DM and DP
from the resistor-divider and DP and DM are shorted
together for dedicated charging mode.
Once the charging voltage is removed, the short between
DP and DM is disconnected for normal operation.
Automatic Peripheral Reset
The MAX14566E/MAX14566AE feature automatic current-
limit switch control output. This feature resets the peripher-
al connected to VBUS in the event the USB host switches to
or from standby mode. CEN/CEN provide a 1s (typ) pulse
on the rising or falling edge of CB (Figures 4, 5, and 6).
Table 1. Digital Input State (MAX14566E/MAX14566AE)
CB
MODE
DP/DM
0
AM
Autodetection Circuit Active
1
PM
Connected to TDP/TDM
COMMENT
Auto Mode
USB Traffic Active
INTERNAL RESISTOR-DIVIDER
Connected
Not Connected
Table 2. Digital Input State (MAX14566BE)
CB
CB1
0
0
0
1
1
X
X = Don't care.
MODE
AM
FM
PM
STATUS
Auto Mode
Forced Dedicated-Charger Mode: DP/DM Shorted
Pass-Through (USB) Mode: Connect DP/DM to TDP/TDM
USB PERIPHERAL
ATTACH
STANDBY
PM
CB AM
PM
AM
CEN
tVBT
VBUS 5V
USB CONNECTION
CHARGING CURRENT
1000mA 500mA
1000mA
500mA
1000mA
Figure 4. MAX14566E Peripheral Reset Timing Diagram
11
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