參數(shù)資料
型號： HT48RB8
廠商： Holtek Semiconductor Inc.
英文描述： 8-Bit USB Type OTP MCU
中文描述： 8位微控制器的USB型檢察官辦公室
文件頁數(shù)： 4/45頁
文件大小： 281K
代理商： HT48RB8
Pin Name
I/O
ROM Code
Option
Description
VSS
Negative power supply, ground
PC0~PC7
I/O
Pull-high
Bidirectional I/O lines. Software instructions determine the CMOS out-
put or Schmitt trigger input with pull-high resistor (determined by
pull-high options).
PC0 can be used as USB mouse IRPT control pin for mouse hardware
wake-up function
RES
I
Schmitt trigger reset input. Active low
VDD
Positive power supply
V33O
O
3.3V regulator output
USBD+
I/O
USBD+ I/O line
USBD-
I/O
USBD-
OSC1
OSC2
I
O
OSC1, OSC2 are connected to an 6MHz or 12MHz Crystal/resonator
(determined by software instructions) for the internal system clock.
Absolute Maximum Ratings
Supply Voltage...........................V
SS
0.3V to V
SS
+6.0V
Storage Temperature............................ 50 C to 125 C
Input Voltage..............................V
SS
0.3V to V
DD
+0.3V
Operating Temperature........................... 40 C to 85 C
Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
D.C. Characteristics
Ta=25 C
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Conditions
V
DD
Operating Voltage
f
SYS
=6MHz
4.4
5.5
V
f
SYS
=12MHz
4.4
5.5
V
I
DD1
Operating Current (6MHz Crystal)
5V
No load, f
SYS
=6MHz
6.5
12
mA
I
DD2
Operating Current (12MHz Crystal)
5V
No load, f
SYS
=12MHz
7.5
16
mA
I
STB1
Standby Current (WDT Enabled)
5V
No load, system HALT,
USB suspend
250
A
I
STB2
Standby Current (WDT Disabled)
5V
No load, system HALT,
USB suspend
230
A
V
IL1
Input Low Voltage for I/O Ports
0
0.3V
DD
V
V
IH1
Input High Voltage for I/O Ports
0.7V
DD
V
DD
V
V
IL2
Input Low Voltage (RES)
5V
0
0.4V
DD
V
V
IH2
Input High Voltage (RES)
5V
0.9V
DD
V
DD
V
I
OL1
I/OPortSinkCurrentforPB,PC1~PC7,PD
5V
V
OL
=3.4V
12
17
mA
I
OL2
I/OPortSinkCurrentforPB,PC1~PC7,PD
5V
V
OL
=0.4V
2
4
mA
I
OL3
I/O Port Sink Current for PA
5V
V
OL
=0.4V
5
10
mA
I
OL4
I/O Port Sink Current for PC0
5V
V
OL
=0.4V
10
25
mA
HT48RB8
Rev. 1.30
4
February 10, 2003
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