Intel LN83C51FA Event-control chmos single-chip 8-bit microcontroller Datasheet

80C51FA/83C51FA
EVENT-CONTROL CHMOS SINGLE-CHIP
8-BIT MICROCONTROLLER
Automotive
Y
Extended Automotive
Temperature Range
( b 40§ C to a 125§ C Ambient)
Y
Programmable Serial Channel with:
Ð Framing Error Detection
Ð Automatic Address Recognition
Y
High Performance CHMOS Process
Y
Y
Three 16-Bit Timer/Counters
Ð Timer 2 is an Up/Down
Timer/Counter
TTL and CMOS Compatible Logic
Levels
Y
64K External Program Memory Space
Y
64K External Data Memory Space
Y
MCSÉ 51 Microcontroller Fully
Compatible Instruction Set
Y
Power Saving Idle and Power Down
Modes
Y
Programmable Counter Array with:
Ð High Speed Output,
Ð Compare/Capture,
Ð Pulse Width Modulator,
Ð Watchdog Timer Capabilities
Y
8K On-Chip ROM
Y
ONCE (On-Circuit Emulation) Mode
Y
256 Bytes of On-Chip Data RAM
Y
Available in PLCC and PDIP Packages
Y
Boolean Processor
Y
32 Programmable I/O Lines
Y
7 Interrupt Sources
(See Packaging Specification, Order Ý231369)
Y
Available in 12 MHz and 16 MHz
Versions
MEMORY ORGANIZATION
PROGRAM MEMORY: Up to 8 Kbytes of the program memory can reside in the on-chip ROM. In addition the
device can address up to 64K of program memory external to the chip.
DATA MEMORY: This microcontroller has a 256 x 8 on-chip RAM. In addition it can address up to 64 Kbytes of
external data memory.
The Intel 80C51FA/83C51FA is a single-chip control oriented microcontroller which is fabricated on Intel’s
CHMOS III (83C51FA) ROM technology. For the remainder of this datasheet references to the ROMless
(80C51FA) and ROM (83C51FA) versions will be denoted as 83C51FA. Being a member of the MCSÉ 51
microcontroller family, the 83C51FA uses the same powerful instruction set, has the same architecture, and is
pin-for-pin compatible with the existing MCS 51 microcontroller products. The 83C51FA is an enhanced
version of the 87C51. It’s added features 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 brake and
traction control. It also has a more versatile serial channel that facilitates multi-processor communications.
NOTICE:
This datasheet contains information on products in full production. Specifications within this datasheet
are subject to change without notice. Verify with your local Intel sales office that you have the latest
datasheet before finalizing a design.
*Other 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
copyright, 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.
COPYRIGHT © INTEL CORPORATION, 1995
February 1995
Order Number: 270501-007
AUTOMOTIVE 80C51FA/83C51FA
270501 – 1
Figure 1. 83C51FA Block Diagram
2
AUTOMOTIVE 80C51FA/83C51FA
80C51FA/83C51FA PRODUCT
OPTIONS
Intel’s extended and automotive temperature range
products are designed to meet the needs of those
applications whose operating requirements exceed
commercial standards.
With the commercial standard temperature range,
operational characteristics are guaranteed over the
temperature range of 0§ C to 70§ C ambient. With the
extended temperature range option, operational
characteristics are guaranteed over the temperature
range of b 40§ C to a 85§ C ambient. For the automotive temperature range option, operational characteristics are guaranteed over the temperature range
of b 40§ C to a 125§ C ambient.
As shown in Figure 2 temperature, burn-in, and
package options are identified by a one- or two-letter
prefix to the part number.
270501 – 2
*Example:
AN83C51FA indicates an automotive temperature range version of the 83C51FA in a PLCC package with 8 Kbyte ROM
program memory.
Figure 2. MCSÉ 51 Microcontroller Product Family Nomenclature
Table 1. Temperature Options
Temperature
Designation
Operating
Temperature
§ C Ambient
Burn-In
Options
Extended
T
L
b 40 to a 85
b 40 to a 85
Standard
Extended
Automotive
A
B
b 40 to a 125
b 40 to a 125
Standard
Extended
Temperature
Classification
3
AUTOMOTIVE 80C51FA/83C51FA
PIN DESCRIPTIONS
Port Pin
Alternate Function
VCC: Supply voltage.
P1.0
T2 (External Count Input to Timer/
Counter 2)
VSS: Circuit ground.
P1.1
T2EX (Timer/Counter 2 Capture/
Reload Trigger and Direction Control)
ECI (External Count Input to the PCA)
Port 0: Port 0 is an 8-bit, open drain, bidirectional
I/O port. As an output port each pin can sink several
LS TTL inputs. Port 0 pins that have 1’s written to
them float, and in that state can be used as high-impedance inputs.
Port 0 is also the multiplexed low-order address and
data bus during accesses to external Program and
Data Memory. In this application it uses strong internal pullups when emitting1’s, and can source and
sink several LS TTL inputs.
Port 0 outputs the code bytes during program verification. External pullup resistors are required during
program verification.
Port 1: Port 1 is an 8-bit bidirectional I/O port with
internal pullups. The Port 1 output buffers can drive
LS TTL inputs. Port 1 pins that have 1’s written to
them are pulled high by the internal pullups, 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 datasheet) because of the internal pullups.
In addition, Port 1 serves the functions of the following special features of the 83C51FA:
P1.2
P1.3
CEX0 (External I/O for Compare/
Capture Module 0)
P1.4
CEX1 (External I/O for Compare/
Capture Module 1)
CEX2 (External I/O for Compare/
Capture Module 2)
CEX3 (External I/O for Compare/
Capture Module 3)
P1.5
P1.6
P1.7
CEX4 (External I/O for Compare/
Capture Module 4)
Port 2: Port 2 is an 8-bit bidirectional I/O port with
internal pullups. The Port 2 output buffers can drive
LS TTL inputs. Port 2 pins that have 1’s written to
them are pulled high by the internal pullups, 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 datasheet) because of the internal pullups.
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. During accesses to external Data Memory that use 8-bit
Pin (PDIP)
Pad (PLCC)
270501 – 3
270501 – 4
**Do not connect reserved pins.
Diagrams are for pin reference only. Package sizes are not to scale.
Figure 3. Pin Connections
4
AUTOMOTIVE 80C51FA/83C51FA
addresses (MOVX @ Ri), Port 2 emits the contents of
the P2 Special Function Register.
Port 3: Port 3 is an 8-bit bidirectional I/O port with
internal pullups. The Port 3 output buffers can drive
LS TTL inputs. Port 3 pins that have 1’s written to
them are pulled high by the internal pullups, 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 datasheet) because of the pullups.
EA/VPP: 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 0FFFFH. Note, however, that if either of
the Program Lock bits are programmed, EA will be
internally latched on reset.
EA should be strapped to VCC for internal program
executions.
XTAL1: Input to the inverting oscillator amplifier.
Port 3 also serves the functions of various special
features of the MCS 51 microcontroller 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)
RESET: Reset input. A high on this pin for two machine cycles while the oscillator is running resets the
device. An internal pulldown resistor permits a power-on reset with only a capacitor connected to VCC.
ALE/PROG: Address Latch Enable output pulse for
latching the low byte of the address during accesses
to external memory.
In normal operation ALE is emitted at a constant
rate of (/6 the oscillator frequency, and may be used
for external timing or clocking purposes. Note, however, that one ALE pulse is skipped during each access to external Data Memory.
XTAL2: Output from the inverting oscillator amplifier.
OSCILLATOR CHARACTERISTICS
XTAL1 and XTAL2 are the input and output, respectively, of a inverting amplifier which can be configured for use as an on-chip oscillator, as shown in
Figure 4. Either a quartz crystal or ceramic resonator
may be used. More detailed information concerning
the use of the on-chip oscillator is available in Application Note AP-155, ‘‘Oscillators for Microcontrollers.’’
To drive the device from an external clock source,
XTAL1 should be driven, while XTAL2 floats, as
shown in Figure 5. There are no requirements on the
duty cycle of the external clock signal, since the input to the internal clocking circuitry is through a divide-by-two flip-flop, but minimum and maximum
high and low times specified on the datasheet 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 exceed 20 pF.
Throughout the remainder of this datasheet, 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 83C51FA is executing code from external
Program Memory, PSEN is activated twice each machine cycle, except that two PSEN activations are
skipped during each access to external Data Memory.
270501 – 5
C1, C2 e 30 pF g 10 pF for Crystals
For Ceramic Resonators, contact resonator manufacturer.
Figure 4. Oscillator Connections
5
AUTOMOTIVE 80C51FA/83C51FA
restored to its normal operating level and must be
held active long enough for the oscillator to restart
and stabilize (normally less than 10 ms).
With an external interrupt, INT0 or INT1 must be enabled and configured as level-sensitive. Holding the
pin low restarts the oscillator but bringing the pin
back high completes the exit. Once the interrupt is
serviced, the next instruction to be executed after
RETI will be the one following the instruction that put
the device into Power Down.
270501 – 6
Figure 5. External Clock Drive Configuration
DESIGN CONSIDERATION
IDLE MODE
The user’s software can invoke the Idle Mode. When
the microcontroller is in this mode, power consumption is reduced. The Special Function Registers and
the onboard RAM retain their values during Idle, but
the processor stops executing instructions. Idle
Mode will be exited if the chip is reset or if an enabled interrupt occurs. The PCA timer/counter can
optionally be left running or paused during Idle
Mode.
When the Idle mode is terminated by a hardware
reset, the device normally resumes program execution, from where it left off, up to two machine cycles
before the internal reset algorithm takes control. Onchip hardware inhibits access to internal RAM in this
event, but access to the port pins is not inhibited. To
eliminate the possibility of an unexpected write when
Idle is terminated by reset, the instruction following
the one that invokes Idle should not be one that
writes to a port pin or to external memory.
ONCE MODE
POWER DOWN MODE
To save even more power, a Power Down mode can
be invoked by software. In this mode, the oscillator
is stopped and the instruction that invoked Power
Down is the last instruction executed. The on-chip
RAM and Special Function Registers retain their values if the Power Down mode is terminated with an
interrupt.
On the 83C51FA either a hardware reset or external
interrupt can cause an exit from Power Down. Reset
redefines all the SFRs but does not change the onchip RAM. An external interrupt allows both the
SFRs and the on-chip RAM to retain their values.
To properly terminate Power Down the reset or external interrupt should not be executed before VCC is
The ONCE (‘‘On-Circuit Emulation’’) Mode facilitates
testing and debugging of systems using the
83C51FA without the 83C51FA having to be removed from the circuit. The ONCE Mode is invoked
by:
1) Pull ALE low while the device is in reset and
PSEN is high;
2) Hold ALE low as RST is deactivated.
While the device is in ONCE Mode, the Port 0 pins
float, the other port pins and ALE and PSEN are
weakly pulled high. The oscillator circuit remains active. While the 83C51FA is in this mode, an emulator
or test CPU can be used to drive the circuit. Normal
operation is restored when a normal reset is applied.
Table 2. Status of the External Pins during Idle and Power Down
Program
Memory
ALE
PSEN
Idle
Internal
1
1
Data
Data
Data
Data
Idle
External
1
1
Float
Data
Address
Data
Power Down
Internal
0
0
Data
Data
Data
Data
Power Down
External
0
0
Float
Data
Data
Data
Mode
PORT0
PORT1
PORT2
PORT3
NOTE:
For more detailed information on the reduced power modes refer to current Embedded Applications Handbook, and Application Note AP-252, ‘‘Designing with the 80C51BH.’’
6
AUTOMOTIVE 80C51FA/83C51FA
ABSOLUTE MAXIMUM RATINGS*
NOTICE: This is a production data sheet. The specifications are subject to change without notice.
Ambient Temperature
Under Bias ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ b 40§ C to a 125§ C
Storage Temperature ÀÀÀÀÀÀÀÀÀÀ b 65§ C to a 150§ C
Voltage on Any Other Pin to VSS ÀÀ b 0.5V to a 6.5V
IOL I/O PinÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ15 mA
*WARNING: Stressing the device beyond the ‘‘Absolute
Maximum Ratings’’ may cause permanent damage.
These are stress ratings only. Operation beyond the
‘‘Operating Conditions’’ is not recommended and extended exposure beyond the ‘‘Operating Conditions’’
may affect device reliability.
Power DissipationÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ1.5W
(Based on PACKAGE heat transfer limitations, not
device power consumption)
Typical Junction Temperature (TJ) ÀÀÀÀÀÀÀÀ a 135§ C
(Based upon Ambient Temperature at a 125§ C)
Typical Thermal Resistance
Junction-to-Ambient (iJA)
PDIP ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ45§ C/W
PLCCÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ46§ C/W
DC CHARACTERISTICS:
Symbol
(TA e b 40§ C to a 125§ C; VCC e 5V g 10%; VSS e 0V)
Parameter
VIL
Input Low Voltage
VIL1
Input Low Voltage EA
VIH
Input High Voltage
(Except XTAL2, RST, EA)
VIH1
Input High Voltage
(XTAL, RST)
VOL
Max
Unit
b 0.5
Min
Typ
0.2 VCC b 0.1
V
Test Conditions
0
0.2 VCC b 0.3
V
0.2 VCC a 0.9
VCC a 0.5
V
0.7 VCC
VCC a 0.5
V
Output Low Voltage
(Ports 1, 2 and 3)
0.45
V
IOL e 1.6 mA(1)
VOL1
Output Low Voltage
(Port 0, ALE/PROG, PSEN)
0.45
V
IOL e 20
IOL e 3.2 mA(1)
IOL e 7.0 mA
VOH
Output High Voltage
(Ports 1, 2 and 3
ALE/PROG and PSEN)
2.4
V
IOH e b 60 mA
0.9 VCC
V
IOH e b 10 mA(2)
2.4
V
IOH e b 800 mA
0.9 VCC
V
IOH e b 80 mA(2)
VOH1
Output High Voltage
(Port 0 in External Bus Mode)
IIL
Logical 0 Input Current
(Ports 1, 2 and 3)
b 10
b 50
mA
VIN e 0.45V
ILI
Input leakage Current
(Port 0)
0.02
g 10
mA
VIN e VIL or VIH
7
AUTOMOTIVE 80C51FA/83C51FA
DC CHARACTERISTICS:
Symbol
(TA e b 40§ C to a 125§ C; VCC e 5V g 10%; VSS e 0V) (Continued)
Parameter
ITL
Logical 1 to 0 Transition Current
(Ports 1, 2, and 3)
RRST
RST Pulldown Resistor
CIO
Pin Capacitance
ICC
Power Supply Current:
Running at 12 MHz (Figure 5)
Idle Mode at 12 MHz (Figure 5)
Power Down Mode (IPD)
Min
40
Typ
Max
Unit
b 265
b 650
mA
100
225
KX
10
pF
Test Conditions
VIN e 2V
@ 1MHz,
25§ C
(Note 3)
40
15
150
mA
mA
mA
NOTES:
1. Capacitive loading on Ports 0 and 2 may cause noise pulses to be superimposed on the VOLs of ALE and Ports 1 and 3.
The noise is due to external bus capacitance discharging into the Port 0 and Port 2 pins when these pins make 1 to 0
transitions during bus operations. In applications where capacitance loading exceeds 100 pFs, the noise pulse on the ALE
signal may exceed 0.8V. In these cases, it may be desirable to qualify ALE with a Schmitt Trigger, or use an Address Latch
with a Schmitt Trigger Strobe input.
2. Capacitive loading on Ports 0 and 2 cause the VOH on ALE and PSEN to drop below the 0.9 VCC specification when the
address lines are stabilizing.
3. See Figures 6–9 for test conditions. Minimum VCC for Power Down is 2.0V.
4. Typicals are based on limited number of samples, and are not guaranteed. The values listed are at room temperature and
5.0V.
5. Under steady state (non-transient) conditions, IOL must be externally limited as follows:
10 mA
Maximum IOL per Port Pin:
Maximum IOL per 8-Bit Port Port 0:
26 mA
Ports 1, 2, and 3:
15 mA
71 mA
Maximum Total IOL for all Output Pins:
If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater
than the listed test conditions.
6. Contact Intel for design-in information.
8
AUTOMOTIVE 80C51FA/83C51FA
270501 – 7
ICC Max at other frequencies is given by:
Active Mode
ICC Max e (3 c Osc Freq) a 4
Idle Mode
ICC Max e (0.49 c Osc Freq) a 1.6
Where Osc Freq is in MHz, ICC is in mA.
270501 – 8
TCLCH e TCHCL e 5 ns
Figure 7. ICC Test Condition, Active Mode
All other pins disconnected.
Figure 6. ICC vs Frequency
270501 – 10
270501 – 9
TCLCH e TCHCL e 5 ns
Figure 8. ICC Test Condition Idle Mode.
All other pins disconnected.
Figure 9. ICC Test Condition,
Power Down Mode.
All other pins disconnected.
VCC e 2.0V to 5.5V.
270501 – 11
Figure 10. Clock Signal Waveform for ICC Tests in Active and Idle Modes. TCLCH e TCHCL e 5 ns.
9
AUTOMOTIVE 80C51FA/83C51FA
EXPLANATION OF THE AC SYMBOLS
Each timing symbol has 5 characters. The first character 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
(TA e b 40§ C to a 125§ C, VCC e 5V g 10%, VSS e 0V, Load Capacitance
for Port 0, ALE/PROG and PSEN e 100 pF, Load Capacitance for All Other Outputs e 80 pF)
EXTERNAL MEMORY CHARACTERISTICS
Symbol
Parameter
12 MHz Oscillator
Variable Oscillator
Min
Min
Max
3.5
16
Max
Units
1/TCLCL
Oscillator Frequency
TLHLL
ALE Pulse Width
127
2TCLCL b 40
ns
TAVLL
Address Valid to ALE Low
43
TCLCL b 40
ns
TLLAX
Address Hold After ALE Low
53
TCLCL b 30
TLLIV
ALE Low to Valid Instruction In
TLLPL
ALE Low to PSEN Low
53
TCLCL b 30
ns
TPLPH
PSEN Pulse Width
205
3TCLCL b 45
ns
TPLIV
PSEN Low to Valid Instruction In
TPXIX
Input Instr Hold After PSEN Trans
TPXIZ
Input Instr Float After PSEN Trans
TAVIV
TPLAZ
TRLRH
RD Pulse Width
400
6TCLCL b 100
TWLWH
WR Pulse Width
400
6TCLCL b 100
224
ns
4TCLCL b 110
135
MHz
ns
3TCLCL b 115
ns
59
TCLCL b 25
ns
Address to Valid Instruction In
302
5TCLCL b 115
ns
PSEN Low to Address Float
10
10
ns
0
0
ns
ns
TRLDV
RD Low to Valid Data In
TRHDX
Data Hold After RD High
TRHDZ
Data Float After RD High
107
2TCLCL b 60
ns
TLLDV
ALE Low to Valid Data In
507
8TCLCL b 160
ns
TAVDV
Address Valid to Valid Data In
575
9TCLCL b 175
ns
TLLWL
ALE Low to RD or WR Low
200
TAVWL
Data Valid to WR Low
203
4TCLCL b 130
ns
TQVWX
Address Valid before WR Low
23
TCLCL b 50
ns
TWHQX
Data Hold after WR High
33
TCLCL b 50
ns
433
7TCLCL b 150
TQVWH
Data Valid to WE High
TRLAZ
RD Low to Address Float
TWHLH
RD or WR High to ALE High
10
242
ns
b 10
ns
b 10
300
3TCLCL b 50
0
43
5TCLCL b 175
123
TCLCL b 40
ns
3TCLCL a 50
ns
ns
0
ns
TCLCL a 40
ns
AUTOMOTIVE 80C51FA/83C51FA
EXTERNAL PROGRAM MEMORY READ CYCLE
270501 – 12
EXTERNAL DATA MEMORY READ CYCLE
270501 – 13
EXTERNAL DATA MEMORY WRITE CYCLE
270501 – 14
11
AUTOMOTIVE 80C51FA/83C51FA
SERIAL PORT TIMINGÐSHIFT REGISTER MODE
Test Conditions:
TA e b 40§ C to a 125§ C; VCC e 5V g 10%; VSS e 0V; Load Capacitance e 80 pF
12 MHz Oscillator
Variable Oscillator
Parameter
Units
Min
Max
Min
Max
Symbol
TXLXL
Serial Port Clock Cycle Time
1
12TCLCL
ms
TQVXH
Output Data Setup to Clock
Rising Edge
Output Data Hold after
Clock Rising Edge
700
10TCLCL b 133
ns
50
2TCLCL b 117
ns
Input Data Hold After Clock
Rising Edge
Clock Rising Edge to Input
Data Valid
0
0
ns
TXHQX
TXHDX
TXHDV
700
10TCLCL b 133
ns
SHIFT REGISTER MODE TIMING WAVEFORMS
270501 – 15
EXTERNAL CLOCK DRIVE
Symbol
Parameter
Min
Max
Units
1/TCLCL
Oscillator Frequency
3.5
16
MHz
TCHCX
High Time
20
TCLCX
Low Time
20
TCLCH
Rise Time
20
ns
TCHCL
Fall Time
20
ns
ns
ns
EXTERNAL CLOCK DRIVE WAVEFORM
270501 – 16
12
AUTOMOTIVE 80C51FA/83C51FA
AC TESTING INPUT, OUTPUT WAVEFORMS
270501 – 17
AC Inputs during testing are driven at VCC b 0.5V for a Logic ‘‘1’’
and 0.45V for a Logic ‘‘0’’. Timing measurements are made at VIH
min for a Logic ‘‘1’’ and VOL max for a Logic ‘‘0’’.
FLOAT WAVEFORMS
270501 – 18
For timing purposes a port pin is no longer floating when a
100 mV change from load voltage occurs, and begins to float
when a 100 mV change from the loaded VOH/VOL level occurs.
IOL/IOH t g 20 mA. This is for Ports 1, 2 and 3.
DATASHEET REVISION HISTORY
The following are key differences between this datasheet and the -006 version:
1. The ‘‘preliminary’’ status was dropped and replaced with production status (no label).
2. Trademarks were updated.
The following are key differences between the -006 and the -005 version of the datasheet:
1. Preliminary notice has been added to the Title page.
2. Figure 3 Pin Connections has been modified, RST pin is now RESET pin.
3. RST pin description is now RESET pin description.
4. Figure 6 ICC vs. Frequency has been corrected to show test conditions.
5. ICC Max spec has been corrected.
6. A.C. Characteristic table 1/TCLCL spec has been changed to have a Max frequency of 16 MHz.
The following are key differences between the -005 and the -004 version of the datasheet:
1. ‘‘NC’’ pin labels changed to ‘‘Reserved’’ in Figure 3.
2. Capacitor value for ceramic resonators deleted in Figure 4.
The following are the key differences between the -003 version of the 8XC51FA datasheet and the -004
version of the 80C51FA/83C51FA datasheet:
1. Removed references to EPROM from the 8XC51FA datasheet.
2. Revised Figure 4, ‘‘Oscillator Connections’’.
The following are the key differences between the -002 and the -003 version of this datasheet:
1. Dropped word ‘‘maximum’’ from IOL in the Absolute Maximum Rating table.
2. Dropped EA from ILI specification of the DC table.
3. Corrected TQVWH specification (from TTCLCL b 70 to TCLCL b 150).
4. Added note on external clock capacitance loading.
5. Changed the title to 80C51FA/83C51FA Event-Control CHMOS Single-Chip 8-Bit Microcontroller.
6. Added pin count to Figure 1.
7. Changed ILI to g 10 mA.
8. Added ICC Power Down Mode 150 nA.
13
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