CM6620A Datasheet, PDF (10/17 Pages) C-Media Electronics – USB 2.0 High-Speed True HD Audio Processor

CM6620A
USB 2.0 High-Speed True HD Audio Processor
5.2 Pin Description
Pin #
Symbol
64
XSCI
1
XSCO
5
USBDM
6
USBDP
2
VCCHSRT
3
GNDHSRT
7
AVCC
8
AGND
9
DVCC
10
DVCC2P5
11
DGND
20
DVCC
31
DGND
40
DGND
50
DVCC
57
DGND
61
DVCC
33
SPDIFI
13
XD0/MIDI_RX
14
XD1/MIDI_TX
15
XHDA_BCK
16
XHDA_SDI
17
XHDA_SYNC
I/O
Description
Clock
AI
12MHz crystal oscillator input
AO 12MHz crystal oscillator output
USB2.0 BUS Interface
AIO USB 2.0 data negative (USB D- signal)
AIO USB 2.0 data positive (USB D+ signal)
Power/Ground
AI
USB PHY analog power supply pin (3.3V)
AI
USB PHY analog ground
AI
USB PHY analog power supply pin (3.3V)
A
USB PHY analog ground
DI
Digital power supply pin (3.3V)
DO Digital power filter pin (2.5V), connecting external filter capacitors
D
Digital Ground
DI
Digital power supply pin (3.3V)
D
Digital Ground
D
Digital Ground
DI
Digital power supply pin (3.3V)
D
Digital Ground
DI
Digital power supply pin (3.3V)
S/PDIF I
DI
S/PDIF receiver
3.3v input buffer, Schmitt trigger, pull-down
MCU Port 3/MIDI Interface
DIO ^{MCU port 3 bit 0 (MIDI RXD, serial input port)}
Programmable 3.3V/5V tolerance bidirectional buffer, pull-down
DIO ^{MCU port 3 bit 1 (MIDI TXD, serial output port)}
Programmable 3.3V bidirectional buffer, pull-down
High-Definition Audio Interface
DO
HDA link bit clock (24MHz)
Programmable 3.3V output buffer
DI
HDA link serial data in
Programmable 3.3V bidirectional buffer, pull-down
DO
HDA link frame synchronization
Programmable 3.3V output buffer
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