Holtek Semiconductor Inc HT82M91A Datasheet

Features

·
Complete Universal Serial Bus specifica tion 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 in put (optomechanical and mechanical)

General Description

HT82M91A is a 3D mouse encoder chip espe cially designed for USB applications. The HT82M91A can support the USB Standard Re quest as well as HID Class Request version 1.0. It can be briefly described as a Holtek 8-bit mC

Block Diagram

HT82M91A
3D USB Mouse
·
-
-
-
-
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
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.
USBD+
USBD
V33O
OSC1
OSC2
USB
Transceiver
USB
Receiver
-
USB
Transm itter
Voltage
R egulator
Clock
G enerator
RC
RESET
R egister
Set
USB Serial
Interface Engine
(S IE )
and
C ontrol
Logic
M ain
State m achine
Suspend
C ontrol
1 January 28, 2000
Holtek
8-bit
M icro c o n tro lle r
FIFO s´2
VDD
VSS

Pin Assignment

HT82M91A
VSS
V33O
USBD+
USBD
RESET
X1
X2
Y1
Y2
1
2
3
-
4
5
6
7
8
9
OSC1
18
OSC2
17
VDD
16
LED
15
M
14
R
13
L
12
Z2
11
Z1
10
HT82M 91A
1 8 D IP

Pin Description

Pin No. Pin Name I/O Description
USB Interface (2 pins)
3 USBD+ I/O USB data plus
4
USBD-
General purpose I/O (9 pins)
6, 7 X1, X2 I
8, 9 Y1, Y2 I
10, 11 Z1, Z2 I
12, 13, 14
L, R, M I
Miscellaneous (7 pins)
1 VSS
2 V33O O 3.3V voltage output
5 RESET
15 LED I/O Drives LED output
16 VDD
17 OSC2 O 6MHz OSC output
18 OSC1 I 6MHz OSC input
I/O USB data minus
X-axis photo input with built-in Holtek's special dynamic photo in put 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
¾
I Chip reset input, low active
5V positive power supply
¾
-
2 January 28, 2000

Absolute Maximum Ratings

HT82M91A
Supply Voltage .................................-0.3V to 6V
mC Input Voltage ...........V
USB Input Voltage .......V
-0.3V to VDD+0.3V
SS
-0.3V to V
SS
33O
+0.3V
Storage Temperature.................-50°Cto125°C
Operating Temperature ..............-25°Cto70°C
Note: These are stress ratings only. Stresses exceeding the range specified under "Absolute Maxi
mum 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 expo sure to extreme conditions may affect device reliability.

D.C. Characteristics

Ta=25°C
Test Conditions
Symbol Parameter
V
I
I
V
V
V
V
V
V
I
I
I
DD
DD
STB
IL1
IH1
IL2
IH2
IH3
POR
OL1
OH1
OL2
Operating Voltage
Operating Current (Crystal OSC)
Standby Current 5V No load, system Halt
Input Low Voltage for I/O Ports
Input High Voltage for mC I/O Ports
Input Low Voltage (RESET)5V
Input High Voltage (RESET)5V
Input High Voltage for USB I/O Ports
Power on Reset V
DD
Detecting Voltage
Output Port Sink Current 5V
Output Port Source Current 5V
Outpu Ports Sink Current (LED)
V
DD
Conditions
¾¾
5V
5V
5V
No load, f
SYS
¾
¾
=6MHz
¾
¾
3.3V
5V
5V
V
OL
V
OL
V
OL
¾
¾
=0.5V
=4.5V
=4.5V
Min. Typ. Max. Unit
4.5
¾
¾¾
0
3.5
0
3.5
2.8
3
¾
¾-4 ¾
¾
¾
10
¾
¾
¾
¾
¾
¾
4
50
5.5 V
mA
¾
250
mA
1.0 V
5V
1.8 V
5V
3.6 V
3.6 V
mA
¾
mA
mA
¾
-
-
3 January 28, 2000
HT82M91A

A.C. Characteristics

Symbol Parameter
f
SYS
t
WDTosc
t
WDT
t
PWRT
t
OST
Note: t
System Clock (Crystal OSC) 5V
Watchdog Oscillator
Watchdog Time-out Period (RC OSC)
Power-up Timer Period
Oscillation Start-up Timer Period
=1/f
SYS
SYS
Test Conditions
Min. Typ. Max. Unit
V
DD
¾¾
¾¾
Conditions
¾
0 6000
93.75 125 156.25
768 1024 1280 ms
¾¾¾10¾
Power-up or wake-up
¾
form Halt
¾
1024
¾
¾
Ta=25°C
kHz
ms
ms
t
SYS
4 January 28, 2000

Application Circuits

C
1k
W
0.1mF
0.1mF
1M
1.5k
W
W
RECEPT_A
2
3
4
1
1
VSS
2
V33O
3
USBD+
4
USBD
5
RESET
6
X1
7
X2
8
Y1
9
Y2
H T82M 91A
HT82M91A
V
C
18
OSC1
OSC2
VDD
LED
-
M
R
L
Z2
Z1
6M H z
17
16
15
14
13
12
11
10
1k
W
V
CC
1M
W
RECEPT_A
2
3
4
0.1mF
1.5k
W
0.1mF
1k
W
1
1
VSS
2
V33O
3
USBD+
4
USBD
5
RESET
6
X1
7
X2
8
Y1
9
Y2
H T82M 91A
18
OSC1
OSC2
VDD
LED
-
M
R
L
Z2
Z1
6M H z
17
16
15
14
13
12
11
10
Encoder
EVZV X C 00112B
5 January 28, 2000
HT82M91A
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 Ó 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 pres ent 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.
6 January 28, 2000
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