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參數(shù)資料
| 型號： | HT48R50A |
| 廠商： | Holtek Semiconductor Inc. |
| 元件分類： | 數(shù)學(xué)處理器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 5/46頁 |
| 文件大?。?/td> | 1037K |
| 代理商： | HT48R50A |
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Pin Name
I/O
ROM Code
Option
Description
OSC1/PG1
OSC2/PG2
I
O
Pull-high*
Crystal or RC
or Int. RC+I/O
or Int. RC+RTC
OSC1, OSC2 are connected to an RC network or Crystal
(determined by ROM code option) for the internal system
clock.InthecaseofRCoperation,OSC2istheoutputtermi-
nal for 1/4 system clock. These two pins can also be optioned
as an RTC oscillator (32768Hz) or I/O lines. In these two
cases,thesystemclockcomesfromaninternalRCoscillator
whose frequency has 4 options (3.2MHz, 1.6MHz, 800kHz,
400kHz). If the I/O option is selected, the pull-high options
can also be enabled or disabled. Otherwise the PG1 and
PG2 are used as internal registers (pull-high resistors are
always disabled).
Note: *Thepull-highresistorsofeachI/Oport(PA,PB,PC,PD,PG)arecontrolledbyaROMcode
options.
or Schmitt trigger option of port A is controlled by a ROM code option.
Absolute Maximum Ratings
Supply Voltage...............V
SS
0.3V to V
SS
+5.5V
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 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
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Conditions
V
DD1
Operating Voltage
f
SYS
=4MHz
3.3
5.5
V
V
DD2
Operating Voltage
f
SYS
=8MHz
4.5
5.5
V
I
DD1
Operating Current
(Crystal OSC)
3.3V
No load, f
SYS
=4MHz
1
2
mA
5V
3
5
mA
I
DD2
Operating Current
(RC OSC)
3.3V
No load, f
SYS
=4MHz
1
2
mA
5V
3
5
mA
I
DD3
Operating Current
(Crystal OSC)
5V
No load, f
SYS
=8MHz
4
8
mA
HT48R50A-1
Rev. 1.10
5
July 2, 2001
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