HT48C50-1 データシートの表示（PDF） - Holtek Semiconductor
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HT48C50-1 Datasheet PDF : 41 Pages
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HT48R50A-1/HT48C50-1
Pin Name I/O
Options
Description
RES
I
¾
Schmitt trigger reset input. Active low
VDD
¾
¾
Positive power supply
OSC1/PG1
OSC2/PG2
OSC1, OSC2 are connected to an RC network or Crystal (determined by
option) for the internal system clock. In the case of RC operation, OSC2 is
Pull-high*
the output terminal for 1/4 system clock. These two pins can also be
I
O
Crystal
or RC
or Int. RC+I/O
optioned as an RTC oscillator (32768Hz) or I/O lines. In these two cases,
the system clock comes from an internal RC oscillator whose frequency
has 4 options (3.2MHz, 1.6MHz, 800kHz, 400kHz). If the I/O option is se-
or Int. RC+RTC lected, the pull-high option 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, PD, PG) are controlled by options.
Absolute Maximum Ratings
Supply Voltage ...........................VSS-0.3V to VSS+6.0V
Input Voltage..............................VSS-0.3V to VDD+0.3V
Storage Temperature ............................-50°C to 125°C
Operating Temperature...........................-40°C to 85°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² 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 exposure to extreme conditions may affect device reliabil-
ity.
D.C. Characteristics
Symbol
Parameter
VDD
Operating Voltage
Test Conditions
VDD
Conditions
¾ fSYS=4MHz
¾ fSYS=8MHz
Min.
2.2
3.3
IDD1
Operating Current
(Crystal OSC, RC OSC)
3V
¾
No load, fSYS=4MHz
5V
¾
IDD23
Operating Current
(Crystal OSC, RC OSC)
5V No load, fSYS=8MHz
¾
ISTB1
Standby Current
(WDT OSC Enabled RTC Off)
3V
No load, system HALT
5V
¾
¾
ISTB2
Standby Current
(WDT OSC Disabled RTC Off)
3V
No load, system HALT
5V
¾
¾
ISTB3
Standby Current
(WDT OSC Disabled, RTC On)
3V
5V
No load, system HALT
¾
¾
VIL1
Input Low Voltage for I/O Ports ¾
¾
0
VIH1
Input High Voltage for I/O Ports ¾
¾
0.7VDD
VIL2
VIH2
VLVR
Input Low Voltage (RES)
Input High Voltage (RES)
Low Voltage Reset
¾
¾
¾
¾
¾ LVR enabled
0
0.9VDD
2.7
3V VOL=0.1VDD
4
IOL
I/O Port Sink Current
5V VOL=0.1VDD
10
Typ.
¾
¾
1
2.5
4
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
3.0
8
20
Ta=25°C
Max. Unit
5.5
V
5.5
V
2
mA
5
mA
8
mA
5
mA
10
mA
1
mA
2
mA
5
mA
10
mA
0.3VDD
V
VDD
V
0.4VDD
V
VDD
V
3.3
V
¾
mA
¾
mA
Rev. 2.00
4
March 8, 2006
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