HT37Q70/60/50/40/30/20
Pad Description
HT37Q70, HT37Q60, HT37Q50, HT37Q40
Pad Name
VDD
VDD_DAC
VDD_AMP
VSS
VSS_DAC
VSS_AMP
PA0~PA4
PA5/INT
PA6/TMR0
PA7/TMR1
I/O
¾
¾
¾
¾
¾
¾
Configuration
Option
¾
¾
¾
¾
¾
¾
Positive digital power supply
Positive DAC circuit power supply
Positive power Amp. power supply
Negative digital power supply, ground
Negative DAC power supply, ground
Negative AMP power supply, ground
Bidirectional 8-bit input/output port. Each pin can be configured as a wake-up
input by configuration option. Software instructions determine if the pin is a
CMOS output or Schmitt Trigger input. Configuration options determine if all
pins on this port have pull-high resistors. Pins PA5, PA6 and PA7 are
pin-shared with INT, TMR0 and TMR1, respectively.
Bidirectional 8-bit input/output port. Software instructions determine if the pin
is a CMOS output or Schmitt Trigger input. A configuration option determines
if all pins on this port have pull-high resistors.
Bidirectional 8-bit input/output port. Software instructions determine if the pin
is a CMOS output or Schmitt Trigger input. A configuration option determines
if all pins on this port have pull-high resistors. Pins PC0 ~ PC7 are pin-shared
with K0 and K7, respectively (K0~K7 are CR/F function).
Bi-directional 4-bit I/O port. Software instructions determined the CMOS out-
put or Schmitt trigger with a pull-high resistor (determined by pull-high option:
by option).
Pins PD0~PD3 are pin-shared with CR/F OSC input pins RCOUT, RR, RC
and CC.
RCOUT, RR, RC and CC control pin for CR/F Function.
Audio right channel output
Power Amp. output pins
Power Amp. input pin
Power Amp. voltage bias reference pin.
Schmitt Trigger reset input, active low
OSC1, OSC2 are connected to an external RC network or external crystal,
determined by configuration option, for the internal system clock. If the RC
system clock option is selected, pin OSC2 can be used to measure the sys-
tem clock at 1/8 frequency.
No connection
Function
I/O
Pull-high
Wake-up
PB0~PB7
I/O
Pull-high
PC0/K0~
PC7/K7
I/O
Pull-high
PD0/RCOUT
PD1/RR
PD2/RC
PD3/CC
RCH
SP1, SP0
AUD_IN
VBIAS
RES
OSC1
OSC2
NC
I/O
Pull-high
O
O
I
O
I
I
O
¾
¾
¾
¾
¾
¾
Crystal or RC
¾
Note: 1. Each pin on PA can be programmed through a configuration option to have a wake-up function.
2. Individual pins can be selected to have pull-high resistors.
3. Because the two timers are used by MIDI the external timer pin functions are disabled.
Rev. 1.00
9
February 17, 2009
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
