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參數(shù)資料
| 型號(hào)： | GMS97L58 |
| 廠商： | HYNIX SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| 中文描述： | 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | PLASTIC, DIP-40 |
| 文件頁數(shù)： | 3/39頁 |
| 文件大小： | 254K |
| 代理商： | GMS97L58 |
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8-Bit CMOS Microcontorller
GMS97C2051/L2051
HYUNDAI MicroElectonics
3
Pin Description
Vcc
Supply voltage.
GND
Ground.
Port 1
Port 1 is an 8-bit bidirectional I/O port. Port pins P1.2
to P1.7 provide internal pullups. P1.0 and P1.1 re-
quire external pullups. P1.0 and P1.1 also serve as the
positive input (AIN0) and the negative input (AIN1),
respectively, of the on-chip precision analog compara-
tor. The Port 1 output buffers can sink 10mA and can
drive LED displays directly. When 1s are written to
Port1 pins, they can be used as inputs. When pins
P1.2 to P1.7 are used as inputs and are externally pulled
low, they will source current (I
IL
) because of the inter-
nal pullups.
Port 1 also receives code data during EPROM pro-
gramming and program verification.
Port3
Port 3 pins P3.0 to P3.5, P3.7 are seven bidirectional
I/O pins with internal pullups. P3.6 is hard-wired as
an input to the output of the on-chip comparator and is
not accessible as a general purpose I/O pin. The Port
3 output buffers can sink 10mA. When 1s are written
to Port 3 pins they are pulled high by the internal pul-
lups and can be used as inputs. As inputs, Port 3 pins
that are externally being pulled low will source current
(I
IL
) because of the pullups.
Port 3 also serves the functions of various special fea-
ture of the GMS97C2051 as listed below:
Port Pin
Alternate Functions
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
RXD ( serial input port )
TXD ( serial output port )
INT0 ( external interrupt 0 )
INT1( external interrupt 1 )
T0 ( timer 0 external input )
T1 ( timer 0 external input )
Port 3 also receives some control signals for EPROM
programming and programming verification.
RST
Reset input. All I/O pins are reset to 1s as soon as
RST goes high. Holding the RST pin high for two
machine cycles while the oscillator is running resets the
device.
This pin is also receives the 12.75V programming
supply voltage ( Vpp ) during EPROM programming.
XTAL1
Input to the inverting oscillator amplifier and input to
the internal clock operating circuit.
XTAL2
Output from the inverting oscillator amplifier.
Recommended Oscillator Circuit
XTAL1 and XTAL2 are the input and output, respec-
tively, of an inverting amplifier which can be config-
ured for use as an on-chip oscillator, as shown in
Fig-
ure 1.
To drive the device from an external clock
source, XTAL2 should be left unconnected while
XTAL1 is driven as shown in
Figure 2
.
Figure 1.
Oscillator Connections
C2
C1
XTAL2
XTAL1
G N D
Notes: C1, C2 = 30pF
10pF for Crystals
( include stray capacitance )
Figure 2.
External Clock Drive Configuration
XTAL2
XTAL1
GND
EXTERNAL
OSCILLATOR
SIGNAL
NC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| GMS97L2051(中文) | MCU(高性價(jià)比的51單片機(jī)，片內(nèi)2KEPROM,5個(gè)中斷源,2個(gè)定時(shí)/計(jì)數(shù)器) |
| GMT-10A | Fuse |
| GMT-3A | Fuse |
| GMT-4A | Fuse |
| GMT-5A | Fuse |
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