ht82a523r Holtek Semiconductor Inc., ht82a523r Datasheet - Page 4

• Manufacturer Part Number: ht82a523r
• Description: Ht82a523r -- Usb 2.0 Full Speed 8-bit Otp Mcu
• Manufacturer: Holtek Semiconductor Inc.

Absolute Maximum Ratings
Supply Voltage ...........................V
Input Voltage..............................V
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may
Rev. 1.30
PE0/SCSA
PE1/SCKA
PE2/SDIA
PE3/SDOA
PE4~PE7
RES
VSS
AVSS
VDD
VDDIO
AVDD
OSC1
OSC2
V33O
UDP
UDN
Pin Name
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 reliability.
I/O
I/O
I/O
I/O
O
O
I
I
(nibble option)
(nibble option)
Pull-high
Options
wake-up
SS
SS
0.3V to V
0.3V to V
Bidirectional I/O lines. Software instructions determine the CMOS output or
Schmitt trigger input with pull-high resistor (determined by pull-high options:
nibble option).
The PE0 is pin-shared with SCSA. SCSA is a chip select pin of the Serial in-
terface, Master mode is output, Slave mode is input.
The PE1 is pin-shared with SCKA. SCKA is a Serial interface serial clock in-
put/output (Initial is input).
The PE2 is pin-shared with SDIA. SDIA is Serial interface serial input.
The PE3 is pin-shared with SDOA. SDOA is a Serial interface serial output.
Wake up options: PE0~PE7(PE0~PE7 support falling edge wake-up)
Schmitt trigger reset input, active low
Negative power supply, ground
Analogy negative power supply, ground
Positive power supply
Positive power supply, VDDIO is used for PA, PB, PC, PD and PE.
Analogy positive power supply, AVDD should be externally connected to
VDD.
OSC1 and OSC2 are connected to a 6MHz or 12MHz Crystal/resonator (de-
termined by software instructions) for the internal system clock.
3.3V regulator output, can be disabled by firmware.
UDP is USBD+ line
USB function is controlled by software control register.
UDN is USBD- line
USB function is controlled by software control register.
DD
SS
+6.0V
+0.3V
4
Storage Temperature ............................ 50 C to 125 C
Operating Temperature........................... 40 C to 85 C
Description
HT82A523R
May 13, 2008