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HT82M91A 3D USB Mouse
Features
* * * * *
Complete Universal Serial Bus specification compatibility Serial Bus Interface Engine (SIE) USB transceiver Supports three buttons (R, M, L) and three axes (X, Y, Z) input Z axis can support two kinds of scroller input (optomechanical and mechanical)
* * * * * *
Single chip solution especially for USB mouse function Halt function and wake-up feature reduce power consumption Has plug and Play functions Minimal external components 6MHz crystal oscillator for system clock 18-pin DIP package
General Description
HT82M91A is a 3D mouse encoder chip especially designed for USB applications. The HT82M91A can support the USB Standard Request as well as HID Class Request version 1.0. It can be briefly described as a Holtek 8-bit mC with an on-chip USB interface logic. It can use minimal external components to implement three key-switches and four photo-coupler mouse. The USB is specified by the Universal Serial Bus Specification.
Block Diagram
USB T r a n s c e iv e r USB R e c e iv e r USB In te rfa c (S a Co Lo S e r ia l e E n g in e IE ) nd n tro l g ic R e g is te r Set
USBD+ USBD-
USB T r a n s m itte r
H o lte k 8 - b it M ic r o c o n tr o lle r
V33O
V o lta g e R e g u la to r
OSC1 OSC2
C lo c k G e n e ra to r
M a in S ta te m a c h in e
F IF O s 2
RC RESET
S uspend C o n tro l
VDD VSS
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Pin Assignment
VSS 1 2 3 4 5 6 7 8 9 V33O USBD+ USBDRESET X1 X2 Y1 Y2 18 17 16 15 14 13 12 11 10 L Z2 Z1 R M OSC1 OSC2 VDD LED
HT82M 91A 1 8 D IP
Pin Description
Pin No. 3 4 Pin Name USBD+ USBDI/O I/O USB data plus I/O USB data minus X-axis photo input with built-in Holtek's special dynamic photo input resistor Y-axis photo input with built-in Holtek's special dynamic photo input resistor Z-axis input supports two kinds of scroller input; optomechanical and mechanical These pins are input port with pull-high resistor. These pads can function as Left, Right and Middle button input lines. Negative power supply, ground 3.3V voltage output Chip reset input, low active 5V positive power supply 6MHz OSC output 6MHz OSC input Description USB Interface (2 pins)
General purpose I/O (9 pins) 6, 7 8, 9 10, 11 12, 13, 14 1 2 5 15 16 17 18 X1, X2 Y1, Y2 Z1, Z2 L, R, M I I I I
Miscellaneous (7 pins) VSS V33O RESET LED VDD OSC2 OSC1 3/4 O I 3/4 O I
I/O Drives LED output
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Absolute Maximum Ratings
Supply Voltage.................................-0.3V to 6V mC Input Voltage ...........VSS-0.3V to VDD+0.3V USB Input Voltage .......VSS-0.3V to V33O+0.3V Note: These are stress ratings only. Stresses exceeding the range specified under "Absolute Maximum Ratings" may 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. Storage Temperature.................-50C to 125C Operating Temperature ..............-25C to 70C
D.C. Characteristics
Symbol VDD IDD ISTB VIL1 VIH1 VIL2 VIH2 VIH3 VPOR IOL1 IOH1 IOL2 Parameter Operating Voltage Operating Current (Crystal OSC) Standby Current Input Low Voltage for I/O Ports Input High Voltage for mC I/O Ports Input Low Voltage (RESET) Input High Voltage (RESET) Test Conditions VDD 3/4 5V 5V 5V 5V 5V 5V Conditions 3/4 No load, fSYS=6MHz No load, system Halt 3/4 3/4 3/4 3/4 3/4 3/4 VOL=0.5V VOL=4.5V VOL=4.5V Min. 4.5 3/4 3/4 0 3.5 0 3.5 2.8 3 3/4 3/4 3/4 Typ. 3/4 10 3/4 3/4 3/4 3/4 3/4 3/4 3/4 4 -4 50 Max. 5.5 3/4 250 1.0 5 1.8 5 3.6 3.6 3/4 3/4 3/4
Ta=25C Unit V mA mA V V V V V V mA mA mA
Input High Voltage for USB 3.3V I/O Ports Power on Reset VDD Detecting Voltage Output Port Sink Current Output Port Source Current Outpu Ports Sink Current (LED) 5V 5V 5V 5V
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A.C. Characteristics
Symbol fSYS tWDTosc tWDT tPWRT tOST Parameter System Clock (Crystal OSC) Watchdog Oscillator Watchdog Time-out Period (RC OSC) Power-up Timer Period Oscillation Start-up Timer Period Test Conditions VDD 5V 3/4 3/4 3/4 3/4 Conditions 3/4 3/4 3/4 3/4 Power-up or wake-up form Halt Min. Typ. Max. 0 93.75 768 3/4 3/4 6000 3/4 Ta=25C Unit kHz ms ms ms tSYS
125 156.25 1024 10 1024 1280 3/4 3/4
Note: tSYS=1/fSYS
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HT82M91A
Application Circuits
V 1M W 0 .1 m F 4 1 .5 k W 2 3 4 5 6 7 8 9 0 .1 m F RECEPT_A 3 2 1 1 VSS V33O USBD+ USBDRESET X1 X2 Y1 Y2 Z2 Z1 OSC1 OSC2 VDD LED M R L 18 17 16 15 14 13 12 11 10 1kW 6M H z
CC
1kW
H T82M 91A
V 1M W 0 .1 m F 1 .5 k W 2 3 4 5 6 7 8 9 1kW 0 .1 m F RECEPT_A 4 3 2 1 1 VSS V33O USBD+ USBDRESET X1 X2 Y1 Y2 Z2 Z1 OSC1 OSC2 VDD LED M R L 18 17 16 15 14 13 12 11 10 E ncoder 6M H z
CC
H T82M 91A
EVZVXC 00112B
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Holtek Semiconductor Inc. (Headquarters) No.3 Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan, R.O.C. Tel: 886-3-563-1999 Fax: 886-3-563-1189 Holtek Semiconductor Inc. (Taipei Office) 5F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan, R.O.C. Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (International sales hotline) Holtek Semiconductor (Hong Kong) Ltd. RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Copyright O 2000 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw.
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