參數(shù)資料
型號(hào)： HT48E50
廠商： Holtek Semiconductor Inc.
英文描述： I/O Type 8-Bit MTP MCU With EEPROM
中文描述： I / O型8位微控制器帶有EEPROM中期計(jì)劃
文件頁(yè)數(shù)： 4/46頁(yè)
文件大?。?/td> 303K
代理商： HT48E50
Pad Description
Pad Name
I/O
Options
Description
PA0~PA7
I/O
Pull-high*
Wake-up
CMOS/Schmitt
trigger Input
Bidirectional 8-bit input/output port. Each bit can be configured as a
wake-up input by options. Software instructions determine the CMOS out-
put or Schmitt trigger input or CMOS input with pull-high resistor (determined
by pull-high options).
PB0/BZ
PB1/BZ
PB2~PB7
I/O
Pull-high*
I/O or BZ/BZ
Bidirectional 8-bit input/output port. Software instructions determine the
CMOS output or Schmitt trigger input with pull-high resistor (determined by
pull-high options).
The PB0 and PB1 are pin-shared with BZ and BZ, respectively. Once the
PB0 and PB1 are selected as buzzer driving outputs, the output signals
comefromaninternalPFDgenerator(sharedwithTimer/EventCounter0).
PD0~PD7
I/O
Pull-high*
Bidirectional I/O lines. Software instructions determine the CMOS output
or Schmitt trigger input with pull-high resistor (determined by pull-high op-
tions).
VSS
Negative power supply, ground
PG0/INT
I/O
Pull-high*
Bidirectional I/O line. Software instructions determine the CMOS output or
Schmitt trigger input with pull-high resistor (determined by pull-high op-
tions). The external interrupt input INT, is pin-shared with PG0 and is acti-
vated on a high to low transition.
TMR0
I
Timer/Event Counter 0 Schmitt trigger input (without pull-high resistor)
PC0~PC7
I/O
Pull-high*
Bidirectional I/O lines. Software instructions determine the CMOS output
or Schmitt trigger input with pull-high resistor (determined by pull-high op-
tions).
TMR1
I
Timer/Event Counter 1 Schmitt trigger input (without pull-high resistor)
RES
I
Schmitt trigger reset input. Active low.
VDD
Positive power supply
OSC1
OSC2
I
O
Pull-high*
Crystal
or RC
OSC1, OSC2 are connected to an RC network or Crystal (determined by
options) for the internal system clock. In the case of RC operation, OSC2 is
the output terminal for 1/4 system clock.
Note:
* The pull-high resistors of each I/O port (PA, PB, PC, PD, PG) are controlled by options.
CMOS or Schmitt trigger option of port A is controlled by an option.
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
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.
HT48E50
Rev. 0.00
4
September 29, 2004
Preliminary
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