ht82k94e Holtek Semiconductor Inc., ht82k94e Datasheet - Page 5

• Manufacturer Part Number: ht82k94e
• Description: Ht82k94e/ht82k94a -- Usb Multimedia Keyboard Encoder 8-bit Mcu
• Manufacturer: Holtek Semiconductor Inc.

Note: * include 15k loading of USBD+, USBD- line in host terminal.
A.C. Characteristics
Rev. 1.90
Symbol
Symbol
R
V
V
V
f
f
t
t
t
t
t
t
SYS
TIMER
WDTOSC
WDT1
WDT2
RES
SST
INT
LVR
LVD
V33O
PH
Pull-high Resistance for PA, PB, PC, PD 5V
Low Voltage Reset
Low Battery Detecting Voltage
3.3V Regulator Output
System Clock (Crystal OSC)
Timer I/P Frequency (TMR)
Watchdog Oscillator
Watchdog Time-out Period (WDT OSC) 5V Without WDT prescaler
Watchdog Time-out Period
(System Clock)
External Reset Low Pulse Width
System Start-up Timer Period
Interrupt Pulse Width
Parameter
Parameter
V
V
5V I
5V
5V
5V
DD
DD
Test Conditions
2-battery option
3-battery option
2-battery option
3-battery option
Test Conditions
Without WDT prescaler
Wake-up from HALT
Power-up, Watchdog
Time-out from normal
5
V33O
= 5mA
Conditions
Conditions
HT82K94E/HT82K94A
Min.
Min.
2.1
2.3
2.3
2.5
3.0
25
15
6
0
4
1
1
1024
1024
1024
Typ.
Typ.
2.2
2.4
2.4
2.6
3.3
50
31
8
Max.
Max.
2.3
2.5
2.5
2.7
3.6
80
12
12
70
16
April 29, 2008
t
Ta=25 C
WDTOSC
MHz
MHz
Unit
Unit
t
t
k
ms
ms
SYS
SYS
V
V
V
s
s