ht82a821r Holtek Semiconductor Inc., ht82a821r Datasheet - Page 3

• Manufacturer Part Number: ht82a821r
• Description: Ht82a821r -- Usb Audio Mcu
• Manufacturer: Holtek Semiconductor Inc.

Pin Description
Absolute Maximum Ratings
Supply Voltage ...........................V
Input Voltage..............................V
I
Total Power Dissipation .....................................500mW
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may
Rev. 1.10
OL
Pin No. Pin Name
4~1,
24~21
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Total ..............................................................150mA
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
PA0~PA7
AVDD2
ROUT
LOUT
AVSS2
AVSS1
BIAS
AVDD1
DVSS2
OSCI
OSCO
RESET
DVDD1
USBDN
USBDP
V33O
DVSS1
I/O
I/O
I/O
I/O
O
O
O
O
O
I
I
Bidirectional 8-bit input/output port. Each bit can be configured as wake-up input by
mask option. Software instructions determine the CMOS output or Schmitt trigger input
with or without pull-high (by mask option).
Audio power amplifier positive power supply.
Right driver analog output
Left driver analog output
Audio power amplifier negative power supply, ground
Audio DAC negative power supply, ground
Connect a capacitor to ground to increase half-supply stability
Audio DAC positive power supply
Negative digital & I/O power supply, ground
OSCI, OSCO are connected to an 6MHz or 12MHz crystal/resonator (determined by
software instructions) for the internal system clock
Schmitt trigger reset input, active low
Positive digital power supply
USBDN is USBD- line
USB function is controlled by software control register
USBDP is USBD+ line
USB function is controlled by software control register
3.3V regulator output
Negative digital power supply, ground
SS
SS
0.3V to V
0.3V to V
DD
SS
+6.0V
+0.3V
3
Storage Temperature ............................ 50 C to 125 C
Operating Temperature........................... 40 C to 85 C
I
OH
Total............................................................ 100mA
Description
HT82A821R
June 29, 2007