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PDF TD87C51Fx Data sheet ( Hoja de datos )
| Número de pieza | TD87C51Fx | |
| Descripción | CHMOS Single-Chip 8-Bit Microcontroller | |
| Fabricantes | Intel | |
| Logotipo |  |
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8XC51FX
CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLERS
Commercial/Express
87C51FA/83C51FA/80C51FA/87C51FB/83C51FB/87C51FC/83C51FC
See Table 1 for Proliferation Options
Y High Performance CHMOS
EPROM/ROM/CPU
Y 12/24/33 MHz Operation
Y Three 16-Bit Timer/Counters
Y Programmable Counter Array with:
- High Speed Output,
- Compare/Capture,
- Pulse Width Modulator,
- Watchdog Timer Capabilities
Y Up/Down Timer/Counter
Y Three Level Program Lock System
Y 8K/16K/32K On-Chip Program Memory
Y 256 Bytes of On-Chip Data RAM
Y Improved Quick Pulse Programming
Algorithm
Y Boolean Processor
Y 32 Programmable I/O Lines
Y 7 Interrupt Sources
Y Four Level Interrupt Priority
Y Programmable Serial Channel with:
- Framing Error Detection
- Automatic Address Recognition
Y TTL Compatible Logic Levels
Y 64K External Program Memory Space
Y 64K External Data Memory Space
Y MCS 51 Controller Compatible
Instruction Set
Y Power Saving Idle and Power Down
Modes
Y ONCE (On-Circuit Emulation) Mode
Y Extended Temperature Range Except
for 33 MHz Offering (b40 C to a85 C)
MEMORY ORGANIZATION
ROM
Device
83C51FA
83C51FB
83C51FC
EPROM
Version
87C51FA
87C51FB
87C51FC
ROMLESS
Version
80C51FA
80C51FA
80C51FA
ROM/
EPROM
Bytes
8K
16K
32K
RAM
Bytes
256
256
256
These devices can address up to 64 Kbytes of external program/data memory.
mThe Intel 87C51FA/8XC51FB/8XC51FC is a single-chip control oriented microcontroller which is fabricated on
oIntel's reliable CHMOS III-E technology. The Intel 83C51FA/80C51FA is fabricated on CHMOS III technology.
.cBeing a member of the MCS 51 controller family, the 8XC51FA/8XC51FB/8XC51FC uses the same powerful
instruction set, has the same architecture, and is pin-for-pin compatible with the existing MCS 51 controller
uproducts. The 8XC51FA/8XC51FB/8XC51FC is an enhanced version of the 8XC52/8XC54/8XC58. Its added
t4features make it an even more powerful microcontroller for applications that require Pulse Width Modulation,
High Speed I/O and up/down counting capabilities such as motor control.
eeFor the remainder of this document, the 8XC51FA, 8XC51FB, 8XC51FC will be referred to as the 8XC51FX,
hunless information applies to a specific device.
w.datasOther brands and names are the property of their respective owners.
Information in this document is provided in connection with Intel products. Intel assumes no liability whatsoever, including infringement of any patent or
wcopyright, for sale and use of Intel products except as provided in Intel's Terms and Conditions of Sale for such products. Intel retains the right to make
changes to these specifications at any time, without notice. Microcomputer Products may have minor variations to this specification known as errata.
w COPYRIGHT INTEL CORPORATION, 2004
July 2004
Order Number: 272322-005
1 page  
8XC51FX
Port 3 also serves the functions of various special
features of the MCS-51 Family, as listed below:
Port Pin
Alternate Function
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
RXD (serial input port)
TXD (serial output port)
INT0 (external interrupt 0)
INT1 (external interrupt 1)
T0 (Timer 0 external input)
T1 (Timer 1 external input)
WR (external data memory write strobe)
RD (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. The port pins will be driven to their reset condi-
tion when a minimum VIH1 voltage is applied wheth-
er the oscillator is running or not. An internal pull-
down resistor permits a power-on reset with only a
capacitor connected to VCC.
ALE: Address Latch Enable output pulse for latching
the low byte of the address during accesses to ex-
ternal memory. This pin (ALE/PROG ) is also the
program pulse input during EPROM programming for
the 87C51FX.
In normal operation ALE is emitted at a constant
rate of the 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.
If desired, ALE operation can be disabled by setting
bit 0 of SFR location 8EH. With this bit set, the pin is
weakly pulled high. However, the ALE disable fea-
ture will be suspended during a MOVX or MOVC in-
struction, idle mode, power down mode and ICE
mode. The ALE disable feature will be terminated by
reset. When the ALE disable feature is suspended or
terminated, the ALE pin will no longer be pulled up
weakly. Setting the ALE-disable bit has no affect if
the microcontroller is in external execution mode.
Throughout the remainder of this data sheet, ALE
will refer to the signal coming out of the ALE/PROG
pin, and the pin will be referred to as the ALE/PROG
pin.
PSEN: Program Store Enable is the read strobe to
external Program Memory.
When the 8XC51FX is executing code from external
Program Memory, PSEN is activated twice each ma-
chine cycle, except that two PSEN activations are
skipped during each access to external Data Memo-
ry.
EA/V PP: External Access enable. EA must be
strapped to VSS in order to enable the device to
fetch code from external Program Memory locations
0000H to 0FFFH. Note, however, that if either of the
Program Lock bits are programmed, EA will be inter-
nally latched on reset.
EA should be strapped to VCC for internal program
executions.
This pin also receives the programming supply volt-
age (VPP) during EPROM programming.
XTAL1: Input to the inverting oscillator amplifier.
XTAL2: Output from the inverting oscillator amplifi-
er.
OSCILLATOR CHARACTERISTICS
XTAL1 and XTAL2 are the input and output, respec-
tively, of a inverting amplifier which can be config-
ured for use as an on-chip oscillator, as shown in
Figure 3. Either a quartz crystal or ceramic resonator
may be used. More detailed information concerning
the use of the on-chip oscillator is available in Appli-
cation Note AP-155, ``Oscillators for Microcontrol-
lers.''
To drive the device from an external clock source,
XTAL1 should be driven, while XTAL2 floats, as
shown in Figure 4. There are no requirements on the
duty cycle of the external clock signal, since the in-
put to the internal clocking circuitry is through a
divide-by-two flip-flop, but minimum and maximum
high and low times specified on the data sheet must
be observed.
An external oscillator may encounter as much as a
100 pF load at XTAL1 when it starts up. This is due
to interaction between the amplifier and its feedback
capacitance. Once the external signal meets the VIL
and VIH specifications the capacitance will not ex-
ceed 20 pF.
5
5 Page 
8XC51FX
EXPLANATION OF THE AC SYMBOLS
Each timing symbol has 5 characters. The first char-
acter is always a `T' (stands for time). The other
characters, depending on their positions, stand for
the name of a signal or the logical status of that
signal. The following is a list of all the characters and
what they stand for.
A: Address
C: Clock
D: Input Data
H: Logic level HIGH
I: Instruction (program memory contents)
L: Logic level LOW, or ALE
P: PSEN
Q: Output Data
R: RD signal
T: Time
V: Valid
W: WR signal
X: No longer a valid logic level
Z: Float
For example,
TAVLL e Time from Address Valid to ALE Low
TLLPL e Time from ALE Low to PSEN Low
AC CHARACTERISTICS (Over Operating Conditions, Load Capacitance for Port 0, ALE/PROG and
PSEN e 100 pF, Load Capacitance for All Other Outputs e 80 pF)
EXTERNAL MEMORY CHARACTERISTICS
All parameter values apply to all devices unless otherwise indicated. In this table, 8XC51FX refers to
8XC51FX, 8XC51FX-1 and 8XC51FX-2.
Symbol
Parameter
Oscillator
12 MHz 24 MHz 33 MHz
Variable
Units
Min Max Min Max Min Max Min
Max
1/TCLCL Oscillator Frequency
8XC51FX
8XC51FX-1
8XC51FX-2
8XC51FX-24
8XC51FX-33
3.5 12
3.5 16 MHz
0.5 12
3.5 24
3.5 33
TLHLL ALE Pulse Width
127 43
21 2TCLCLb40
ns
TAVLL
Address Valid to ALE Low
8XC51FX
8XC51FX-24
8XC51FX-33
43
12
TCLCLb40
TCLCLb30
5 TCLCLb25
ns
ns
ns
TLLAX
Address Hold After ALE Low
8XC51FX/-24
53
8XC51FX-33
12
TCLCLb30
5 TCLCLb25
ns
ns
TLLIV
ALE Low to Valid Instr In
8XC51FX
8XC51FX-24
8XC51FX-33
234
91
56
4TCLCLb100 ns
4TCLCLb75 ns
4TCLCLb65 ns
TLLPL
ALE Low to PSEN Low
8XC51FX/-24
8XC51FX-33
53
12
TCLCLb30
5 TCLCLb25
ns
ns
TPLPH PSEN Pulse Width
205 80
46 3TCLCLb45
TPLIV
PSEN Low to Valid Instr In
8XC51FX
8XC51FX-24
8XC51FX-33
145
35
35
3TCLCLb105 ns
3TCLCLb90 ns
3TCLCLb55 ns
TPXIX Input Instr Hold after PSEN 0 0 0
0
ns
11
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| PDF Descargar | [ Datasheet TD87C51Fx.PDF ] | |
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