參數(shù)資料
型號(hào)： HT48R32(18DIP-A0)
元件分類(lèi)： 8位微控制器
英文描述： 8-BIT MICROCONTROLLER
中文描述： 8位微控制器
文件頁(yè)數(shù)： 4/42頁(yè)
文件大小： 259K
代理商： HT48R32(18DIP-A0)
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 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 the 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 lines. Software instructions determine the CMOS output
or Schmitt trigger input with pull-high resistor (determined by pull-high op-
tions). This external interrupt input is pin-shared with PG0. The external in-
terrupt input is activated 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/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
options) for the internal system clock. In the case of RC operation, OSC2 is
the output terminal 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,
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-
lected, the pull-high options can also be enabled or disabled. Otherwise
the PG1 and PG2 are used as internal registers (pull-high resistors are al-
ways 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...........................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.
HT48R50A-1/HT48C50-1
Rev. 1.00
4
January 2, 2003
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