HT82A836R Datasheet, PDF (32/75 Pages) Holtek Semiconductor Inc – USB Audio MCU

HT82A836R
Register
Reset
(Power-on)
WDT
Time-out
(Normal
Operation)
RES Reset
(Normal
Operation)
RES Reset
(HALT)
WDT
Time-Out
(HALT)*
USB Reset USB Reset
(Normal) (HALT)
PLAY_DATAL_H 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu uuuu uuuu uuuu uuuu
PLAY_DATAR_L 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu uuuu uuuu uuuu uuuu
PLAY_DATAR_H 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu uuuu uuuu uuuu uuuu
RECORD_DATA_L 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu uuuu uuuu uuuu uuuu
RECORD_DATA_H 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu uuuu uuuu uuuu uuuu
ADRL
xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu
ADRH
xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu
ADCR
0100 0000 0100 0000 0100 0000 0100 0000 uuuu uuuu uuuu uuuu uuuu uuuu
ACSR
1--- --00 1--- --00 1--- --00 1--- --00 u--- --uu u--- --uu u--- --uu
PA_WAKE_CTRL 0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu uuuu uuuu uuuu uuuu
PWMC
0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu uuuu uuuu uuuu uuuu
PWM0
xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu
PWM1
xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu
MFI1C
0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000
USB_STATE
0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu uuuu uuuu uuuu uuuu
USVC
0000 0000 0000 0000 0000 0000 0000 0000 uuuu uuuu 0000 0000 0000 0000
²*² stands for warm reset
²u² stands for unchanged
²x² stands for unknown
²-² stands for unimplemented
Oscillator
The device use crystal oscillator as the system clock
source. Two types of crystal system clock frequencies
can be selected while various clock source options for
the Watchdog Timer are provided for maximum flexibil-
ity.
System Crystal/Ceramic Oscillator
For the 12MHz crystal oscillator configurations, the sim-
ple connection of a crystal across OSC1 and OSC2 will
create the necessary phase shift and feedback for oscil-
lation. For the 6MHz crystal oscillator configuration the
addition of two small value capacitors are required. The
SYSCLK bit in the UCC register determines the system
frequency selection.
Crystal
C1, C2
6MHz Crystal
22pF
12MHz Crystal
NC
C1
O SCI
O SCO
C2
Crystal/Ceramic Oscillator
Watchdog Timer Oscillator
The WDT oscillator is a fully self-contained free running
on-chip RC oscillator with a typical period of 65 us at 5V
requiring no external components. When the device en-
ters the Power Down Mode, the system clock will stop
running but the WDT oscillator continues to free-run and
to keep the watchdog active. However, to preserve
power in certain applications the WDT oscillator can be
disabled via a configuration option.
Rev. 1.10
32
August 5, 2011