MIC2555 Micrel Semiconductor, MIC2555 Datasheet - Page 3

• Manufacturer Part Number: MIC2555
• Description: USB - OTG Transceiver
• Manufacturer: Micrel Semiconductor

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Pin Description
Micrel, Inc.
June 2005
Pin Number
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
Type
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I
I
I
I
I
I
I
I
DAT_VP_RX
SE0_VM_TX
GPIO_0_RX
GPIO_1_TX
VDD_LGC
Pin Name
OE_INT/
RESET/
GPIO_2
GND_D
GND_A
ADR_0
CAP++
VTRM
VBUS
CAP+
VBAT
CAP-
RCV
SDA
INT/
SCL
D+
ID
D-
with other interrupt signals.
must not be left floating.
indicates both the presence of a device and type (USB or not USB).
circuitry and power for charge pump when driving VBUS.
System Controller / ASIC.
Pin Description
Output from differential receiver.
= SE0 in USB DAT-SE0 mode
= VM in VP-VM mode.
= UART Transmit output when in UART Mode
= DAT in USB DAT-SE0 mode.
= VP in VP-VM mode
= UART Receive input when in UART mode
A Multi-mode pin controlling various functions in conjunction with
control register bits. A logic LOW on this pin gives the following
results:
= OE (Output Enable): Enables D+, D- as USB outputs.
= INT/ (Interrupt): Active LOW output when register bits ‘suspend’ and
Interrupt (bar). Open Drain Active LOW output. May be wire-ORed
= General purpose I/O. Open drain output.
= Alternate UART Receive input.
= General purpose I/O. Open drain output.
= Alternate UART Transmit output.
I
I
Sets Address bit A0 of I
System reset. Active LOW.
General purpose I/O. Open drain output.
System Digital ground.
Identification input. Monitors the ID pin of the USB connector and
= USB D+ when in USB mode.
= UART Receive in UART mode.
= Right Speaker audio output in stereo mode.
= Microphone signal from Car Kit.
= USB D- when in USB mode.
= UART Transmit out in UART mode.
= Left Speaker audio output in stereo mode.
= Monaural audio output to Car Kit.
USB 5V power.
Internal 3.3V supply. Sets USB signal levels.
Positive lead for charge pump reservoir capacitor.
Positive lead for charge pump capacitor.
Positive voltage from battery. Supplies power to MIC2555 internal
Negative lead for charge pump capacitor.
Analog ground. Isolated Charge Pump ground.
Logic supply voltage. Used to set logic levels between MIC2555 and
2
2
C Clock
C Data
See figures 1 and 2 on page 4
See figures 1 and 2 on page 4
See figures 1 and 2 on page 4
See figures 1 and 2 on page 4
‘oe_int_en’ both = 1.
3
2
C controller. This pin is a digital input and
[phone]
M9999-060805
MIC2555