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參數(shù)資料
| 型號： | HT48R50A-1 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | 8-Bit High Performance RISC-like Microcontroller Suitable for Multiple I/O Application(高性能、指令類似RISC的8位微控制器，用于多I/O接口設(shè)備) |
| 中文描述： | 8位高性能RISC架構(gòu)微控制器等的多個I / O應(yīng)用（高性能，指令類似的RISC的8位微控制器，用于多予適用/輸出接口設(shè)備） |
| 文件頁數(shù)： | 5/50頁 |
| 文件大?。?/td> | 345K |
| 代理商： | HT48R50A-1 |
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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: * The pull-high resistors of each I/O port (PA, PB, PC, , PG) are controlled by a ROM code
options.
CMOS 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
5
December 19, 2000
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