HT82K94E_07 Datasheet, PDF (1/43 Pages) Holtek Semiconductor Inc – USB Multimedia Keyboard Encoder 8-Bit MCU

HT82K94E/HT82K94A
USB Multimedia Keyboard Encoder 8-Bit MCU
Technical Document
· Tools Information
· FAQs
· Application Note
Features
· Operating voltage:
f_SYS=6M/12MHz: 2.2V~5.5V
· 40 bidirectional I/O lines (max.)
· 8-bit programmable timer/event counter with
overflow interrupt (shared with PD4, vector 08H)
· 16-bit programmable timer/event counter and
overflow interrupts (shared with PA7, vector 0CH)
· Crystal oscillator (6MHz or 12MHz)
· Watchdog Timer
· PS2 and USB modes supported
· USB 2.0 low speed function
· 4 endpoints supported (endpoint 0 included)
· 6144´16 program memory ROM
· 224´8 data memory RAM
· One internal USB interrupt (vector 04H)
· All I/O ports support wake-up options
· HALT function and wake-up feature reduce power
consumption
· 8-level subroutine nesting
· Up to 0.33ms instruction cycle with 12MHz system
clock at V_DD=5V
· Bit manipulation instruction
· 16-bit table read instruction
· 63 powerful instructions
· All instructions in one or two machine cycles
· Optional 3-battery mode 2.4V LVR/2.6V LVD (±0.1V)
by option, Low battery detector with internal bit
· Optional 2-battery mode 2.2V LVR/2.4V LVD (±0.1V)
by option, Low battery detector with internal bit
· Operating voltage from 4.0V to 5.5V
(For Connect USB/PS2 Mode)
· Operating voltage from 2.2V to 3.3V
(For Pure Cal. Mode)
· 48-pin SSOP package
General Description
This device is an 8-bit high performance RISC architec-
ture microcontroller designed for USB product applica-
tions. It is particularly suitable for use in products such
as keyboards and keyboard with calculator. A HALT fea-
ture is included to reduce power consumption.
The mask version HT82K94A is fully pin and function-
ally compatible with the OTP version HT82K94E device.
The HT82K94A is under development and will be avail-
able soon.
Rev. 1.50
1
October 11, 2007