HT82A520R HOLTEK [Holtek Semiconductor Inc], HT82A520R Datasheet - Page 4

• Manufacturer Part Number: HT82A520R
• Description: Full Speed USB 8-Bit OTP MCU with SPI
• Manufacturer: HOLTEK [Holtek Semiconductor Inc]

Pin Description
HT82A520R
Rev.1.00
PA0/SCS
PA1/SCK
PA2/SDI
PA3/SDO
PA4/PWM0
PA5/PWM1
PA6/INT
PA7/TMR
PB0/PWM2
PB1~PB7
PC0~PC7
OSCI
OSCO
RES
VDD
D-/Data
D+/CLK
V33O
VSS
Pin Name
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I
I
PB7: I/O or VDDIO
PB0~PB6 power:
NMOS or CMOS
from VDD or
Wake-up
Wake-up
Wake-up
Pull-high
Pull-high
Pull-high
Options
VDDIO
Bidirectional 8-bit input/output port. Each pin can be configured as a
wake-up input by a configuration option. Software instructions determine if
the pin is output or Schmitt Trigger input. When if output, Configuration op-
tion may choose CMOS or NMOS. Configuration options determine if the
pins have pull-high resistors. The INT and TMR pins are pin-shared with
PA6 and PA7, respectively. PA0~PA3 are shared with the SPI function.
PA4~PA5 are shared with PWM0~PWM1.
Bi-directional 8-bit input/output port. Software instructions determine if the
pin is a CMOS output or Schmitt Trigger input. Configuration options deter-
mine if the pins have pull-high resistors.
A configuration option determines whether PB7 is an I/O pin or a power
supply pin for PB0~PB6.
A configuration option determines whether the power supply for PB0~PB6
is sourced from VDD or VDDIO.
PB0 shared with PWM2.
Bi-directional 8-bit input/output port. Software instructions determine if the
pin is a CMOS output or Schmitt Trigger input. Configuration options deter-
mine if the pins have pull-high resistors.
OSCI, OSCO are connected to an 6MHz or 12MHz Crystal/resonator (de-
termined by software instructions) for the internal system clock
Schmitt Trigger reset input, active low
Positive power supply
USBD- line
The USB function is controlled by software control registers
USBD+ line
The USB function is controlled by software control registers
3.3V regulator output
Negative power supply, ground
4
Description
HT82A520R/HT82A620R
October 23, 2009