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8751H-8 데이터시트 PDF




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부품번호 8751H-8 기능
기능 MCS51 8-BIT CONTROL-ORIENTED MICROCONTROLLERS
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8751H-8 데이터시트, 핀배열, 회로
smu @
MCS@51
8-BIT CONTROL-ORIENTED MICROCONTROLLERS
Commercial/Express
8031AH18051AH18051AHP
8032N+18052N-I
8751W8751H-8
8751BW8752BI-I
s High Performance HMOS Process
s Boolean Processor
s Internal Timers/Event Counters
s Bit-Addressable RAM
s 2-Level interrupt Priority Structure
s 32 1/0 Lines (Four 8-Bit Ports)
s 64K External Program Memory Space
s Security Feature Protects EPROM Parts
Against Software Piracy
s Programmable Full Duplex Serial
Channel
s 111 Instructions (64 Single-Cycle)
s 64K External Data Memory Space
s Extended Temperature Range
(–40”C to +85”C)
The MCS@51 controllers are optimized for control applications. Byte-processing and numerical operations on
small data structures are facilitated by a variety of fast addressing modes for accessing the internal RAM. The
instruction set provides a convenient menu of 8-bit arithmetic instructions, including multiply and divide instruc-
tions. Extensive on-chip support is provided for one-bit variables as a separate data type, allowing direct bit
manipulation and testing in control and logic systems that require Boolean processing.
The 8751H is an EPROM version of the 8051AH. It has 4 Kbytes of electrically programmable ROM which can
be erased with ultraviolet light. His fully compatible with the 8051AH but incorporates one additional feature: a
Program Memory Security bit that can be used to protect the EPROM against unauthorized readout. The
8751 H-8 is identical to the 8751 H but only operates up to 8 MHz.
The 8051AHP is identical to the 8051AH with the exception of the Protection Feature. To incorporate this
Protection Feature, program verification has been disabled and external memory accesses have been limited
to 4K.
The 8052AH is an enhanced version of the 8051AH. It is backwards compatible with the 8051AH and is
fabricated with HMOS II technology. The 8052AH enhancements are listed in the table below. Also refer to this
table for the ROM, ROMless and-EPROM versions of each product.
Device
8031AH
8051AH
6051AHP
8751 H
8751 H-8
6751 BH
8032AH
6052AH
8752BH
Intsrnal Memory
Program
Data
none
4K X 8 ROM
4K X 6 ROM
4K X 8 EPROM
4K X 8 EPROM
4K X 8 EPROM
none
8K X 8 ROM
8K X 8 EPROM
128 X 8 RAM
128 X 8 RAM
128 X 8 RAM
128 X 8 RAM
128 X 6 RAM
128 X 8 RAM
256 X 6 RAM
256 X 8 RAM
256 X 8 RAM
Timera/
Event Counters
2 x 18-Bit
2 x 16-Bit
2 x 16-Bit
2 x 16-Bit
2 x 16-Bit
2 x 16-Bit
3 x 16-Bit
3 x 16-Bit
3 x 16-Bit
Interrupts
5
5
5
5
5
5
6
6
6
I Intel Corporationassumes no responsibilityfor the use of any circuit~ other than circuitryembodied in an Intel product.No other circuitpatent
licenses are implied.Informationcontained herein supersedes previouslypublishedspecificationson theaa davices from Intel.
O INTEL CORPORATION, 1994
October 1994
Order Numben 272318-002




8751H-8 pdf, 반도체, 판매, 대치품
MCS” 51 CONTROLLER
w
PIN DESCRIPTIONS
Vcc: Supply voltage.
Vss: Circuit ground.
Port O:Port O is an 8-bit open drain bidirectional 1/0
port. As an output port each pin can sink 8 LS TTL
inputs.
Port Opins that have 1‘s written to them float, and in
that state can be used as high-impedance inputs.
Port 2 emits the high-order address byte during
fetches from external Program Memory and during
accesses to external Data Memory that use 16-bit
addresses (MOVX @DPTR). In this application it
uses strong internal pullups when emitting 1‘s. Dur-
ing accesses to external Data Memory that use 8-bit
addresses (MOVX @Ri),Port 2 emits the contents of
the P2 Special Function Register.
Port 2 also receives the high-order address bits dur-
ing programming of the EPROM parts and during
program verification of the ROM and EPROM parts.
Port O is also the multiplexed low-order address and
data bus during accesses to external Program and
Data Memory. In this application it uses strong inter-
nal pullups when emitting 1‘s and can source and
sink 8 LS TTL inputs.
Port O also receives the code bytes during program-
ming of the EPROM parts, and outputs the code
bytes during program verification of the ROM and
EPROM parts. External pullups are required during
program verification.
Port 1: Port 1 is an 8-bit bidirectional 1/0 port with
internal pullups, The Port 1 output buffers can sink/
source 4 LS TTL inputs. Port 1 pins that have 1‘s
written to them are pulled high by the internal pull-
UPS,and in that state can be used as inputs. As
inputs, Port 1 pins that are externally pulled low will
source current (IIL on the data sheet) because of the
internal pullups.
Port 1 also receives the low-order address bytes
during programming of the EPROM parts and during
program verification of the ROM and EPROM parts.
In the 8032AH, 8052AH and 8752BH, Port 1 pins
P1.O and P1.1 also serve the T2 and T2EX func-
tions, respectively.
I IPort
Pin
Alternative Function
P1.0
P1.1
T2 (Timer/Counter 2 External Input)
T2EX (Timer/Counter 2
Capture/Reload Trigger)
I
Port 2: Port 2 is an 8-bit bidirectional l/O port with
internal pullups. The Port 2 output buffers can sink/
source 4 LS TTL inputs. Porl 2 pins that have 1‘s
written to them are pulled high by the internal pull-
UPS,and in that state can be used as inputs. As
inputs, Port 2 pins that are externally pulled low will
source current (IIL on the data sheet) because of the
internal pullups.
The protection feature of the 8051AHP causes bits
P2.4 through P2.7 to be forced to O,effectively limit-
ing external Data and Code space to 4K each during
external accesses.
Port 3: Port 3 is an 8-bit bidirectional l/O port with
internal pullups. The Port 3 output buffers can sink/
source 4 LS TTL inputs. Port 3 pins that have 1‘s
written to them are pulled high by the internal pull-
UPS,and in that state can be used as inputs. As
inputs, Port 3 pins that are externally pulled low will
source current (IIL on the data sheet) because of the
pullups.
Port 3 also serves the functions of various special
features of the MCS 51 Family, as listed below:
Port
Pin
P3,0
P3.1
P3.2
P3,3
P3.4
P3.5
P3.6
P3.7
Alternative Function
RXD (serial input port)
TXD (serial output port)
INTO(external interrupt O)
INT1 (external interrupt 1)
TO(Timer Oexternal input)
T1 (Timer 1 external input)
WR (external data memory write strobe)
~ (external data memory read strobe)
RST: Reset input. A high on this pin for two machine
cycles while the oscillator is running resets the de-
vice,
ALE/PROG: Address Latch Enable output pulse for
latching the low byte of the address during accesses
to external memory. This pin is also the program
pulse input (PROG) during programming of the
EPROM parts.
In normal operation ALE is emitted at a constant
rate of 1/6the oscillator frequency, and may be used
for external timing or clocking purposes. Note, how-
ever, that one ALE pulse is skipped during each ac-
cess to external Data Memory.

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8751H-8 전자부품, 판매, 대치품
MCS” 51 CONTROLLER
ABSOLUTE MAXIMUM RATINGS*
Ambient Temperature Under Bias –40”C to + 85°C
Storage Temperature
. –65°C to + 150°C
Voltage on EA/Vpp Pin to Vss
8751 H . . . . . . . . . . . . . . . . . –0.5V to + 21.5V
8751 BH/6752BH
–0.5V tO + 13.OV
Voltage on Any Other Pinto Vss . –0.5V to + 7V
Power Dissipation.
. . ... 1.5W
NOTICE:This is a productiondata sheet. It is valid for
the devices indicated in the revision history. The
specificationsare subject to change without notice.
*WARNING:Stressing the device beyond the “Absolute
Maximum Ratings” may cause permanent damage.
These are stress ratings orr~. Operation beyond the
“Operating Conditions” is not recommended and ex-
tended exposure beyond the “Operating Conditions”
may affect device reliabili~.
OPERATING CONDITIONS
Symbol
Description
Min Msx Units
TA Ambient Temperature Under Bias
Commercial
o +70 “c
Express
–40 +65
“c
Vcc SupplyVoltage
4.5 5.5
v
Fosc
Oscillator Frequency
3.5 12 MHz
DC CHARACTERISTICS (Over Operating Conditions)
All parameter values apply to all devices unless otherwise indicated
Symbol
Parameter
Min
VIL Input Low Voltage (Except ~ Pin of
6751H and 8751H-8)
–0.5
VIL1
Input Low Voltage to ~ Pin of
6751H and 8751H-8
o
VIH Input High Voltage (Except XTAL2, RST)
2.0
VIH1 Input High Voltage to XTAL2, RST
2.5
VIH2
Input High Voltage to ~ pin
of 6751BH and 8752BH
4.5
VoL Output Low Voltage (Ports 1,2, 3)*
VoLl
Output Low Voltage (Port O,ALE, PSEN)*
8751 H, 8751 H-8
VOH
VOH1
IIL
IILI
All Others
Output High Voltage (Ports 1,2,3, ALE, PSEN)
Output High Voltage (Port Oin
External Bus Mode)
Logical O Input Current (Ports 1,2,3, and RST)
Logical O Input Current (~)
8751H and 8751H-8
8751BH
8752BH
2.4
2.4
–lo
Max
0.8
0.7
Vcc + 0.5
Vcc + 0.5
5.5V
0.45
0.60
0.45
0.45
–500
–15
–lo
0.5
Units
v
v
v
v
v
v
v
v
v
v
pA
mA
mA
mA
mA
Test Conditions
XTAL1 = Vss
loL = 1.6 mA
ioL = 3.2 mA
!OL = 2.4 mA
IOL = 3.2 mA
IOH = –80 PA
IOH = –400 pA
VIN = 0.45V
VIN = 0.45V
VIN = Vss
VIN = Vss
7

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관련 데이터시트

부품번호상세설명 및 기능제조사
8751H-8

MCS 51 8-BIT CONTROL-ORIENTED MICROCONTROLLERS

Intel Corporation
Intel Corporation
8751H-8

MCS51 8-BIT CONTROL-ORIENTED MICROCONTROLLERS

Intel Corporation
Intel Corporation

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