AT87F51 - Atmel Corporation

Features
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Compatible with MCS-51™ Products
4K Bytes of User Programmable QuickFlash™ Memory
Fully Static Operation: 0 Hz to 24 MHz
Three-Level Program Memory Lock
128 x 8-Bit Internal RAM
32 Programmable I/O Lines
Two 16-Bit Timer/Counters
Six Interrupt Sources
Programmable Serial Channel
Low Power Idle and Power Down Modes
Description
The AT87F51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K
bytes of QuickFlash Programmable Read Only Memory. The device is manufactured
using Atmel’s high density nonvolatile memory technology and is compatible with the
industry standard MCS-51™ instruction set and pinout. The on-chip QuickFlash
allows the program memory to be user programmed by a conventional nonvolatile
memory programmer. By combining a versatile 8-bit CPU with QuickFlash on a monolithic chip, the Atmel AT87F51 is a powerful microcomputer which provides a highly
flexible and cost effective solution to many embedded control applications.
8-Bit
Microcontroller
with 4K Bytes
QuickFlash™
AT87F51
(continued)
PDIP
Pin Configurations
(TXD)
(INT0)
(INT1)
(T0)
(T1)
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
EA/VPP
NC
ALE/PROG
PSEN
P2.7 (A15)
P2.6 (A14)
P2.5 (A13)
PLCC
INDEX
CORNER
13 15 17 19 21
12 14 16 18 20 22
(WR) P3.6
(RD) P3.7
X TA L 2
X TA L 1
GND
GND
(A8) P2.0
(A9) P2.1
(A10) P2.2
(A11) P2.3
(A12) P2.4
(RXD)
33
32
31
30
29
28
27
26
25
24
23
1
2
3
4
5
6
7
8
9
10
11
VCC
P0.0 (AD0)
P0.1 (AD1)
P0.2 (AD2)
P0.3 (AD3)
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
EA/VPP
ALE/PROG
PSEN
P2.7 (A15)
P2.6 (A14)
P2.5 (A13)
P2.4 (A12)
P2.3 (A11)
P2.2 (A10)
P2.1 (A9)
P2.0 (A8)
(AD0)
(AD1)
(AD2)
(AD3)
44 42 40 38 36 34
43 41 39 37 35
P1.5
P1.6
P1.7
RST
P3.0
NC
P3.1
P3.2
P3.3
P3.4
P3.5
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
(RXD)
(TXD)
(INT0)
(INT1)
(T0)
(T1)
P1.5
P1.6
P1.7
RST
P3.0
NC
P3.1
P3.2
P3.3
P3.4
P3.5
P1.4
P1.3
P1.2
P1.1
P1.0
NC
VCC
P0.0
P0.1
P0.2
P0.3
P1.4
P1.3
P1.2
P1.1
P1.0
NC
VCC
P0.0
P0.1
P0.2
P0.3
INDEX
CORNER
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
6
4
2
44 42 40
1
3
4 3 4 13 9
7 5
8
38
9
37
36
10
35
11
34
12
33
13
32
14
31
15
16
30
1 7 1 9 2 1 2 3 2 5 2 72 9
18 20 22 24 26 28
(WR) P3.6
(RD) P3.7
X TA L 2
X TA L 1
GND
NC
(A8) P2.0
(A9) P2.1
(A10) P2.2
(A11) P2.3
(A12) P2.4
(AD0)
(AD1)
(AD2)
(AD3)
8TQFP
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
RST
(RXD) P3.0
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
(WR) P3.6
(RD) P3.7
X TA L 2
X TA L 1
GND
Not Recommended
for New Designs.
Use AT89S51.
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
EA/VPP
NC
ALE/PROG
PSEN
P2.7 (A15)
P2.6 (A14)
P2.5 (A13)
Rev. 1012A–02/98
1
Block Diagram
P0.0 - P0.7
P2.0 - P2.7
PORT 0 DRIVERS
PORT 2 DRIVERS
VCC
GND
RAM ADDR.
REGISTER
B
REGISTER
PORT 0
LATCH
RAM
QUICK
FLASH
PORT 2
LATCH
STACK
POINTER
ACC
BUFFER
TMP1
TMP2
PROGRAM
ADDRESS
REGISTER
PC
INCREMENTER
ALU
INTERRUPT, SERIAL PORT,
AND TIMER BLOCKS
PROGRAM
COUNTER
PSW
PSEN
ALE/PROG
EA / VPP
TIMING
AND
CONTROL
INSTRUCTION
REGISTER
DPTR
RST
PORT 1
LATCH
PORT 3
LATCH
PORT 1 DRIVERS
PORT 3 DRIVERS
OSC
P1.0 - P1.7
2
Not
P3.0 - P3.7
Not
The AT87F51 provides the following standard features: 4K
bytes of QuickFlash, 128 bytes of RAM, 32 I/O lines, two
16-bit timer/counters, a five vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator and clock
circuitry. In addition, the AT87F51 is designed with static
logic for operation down to zero frequency and supports
two software selectable power saving modes. The Idle
Mode stops the CPU while allowing the RAM,
timer/counters, serial port and interrupt system to continue
functioning. The Power Down Mode saves the RAM contents but freezes the oscillator disabling all other chip functions until the next hardware reset.
Pin Description
VCC
Supply voltage.
GND
Ground.
Port 0
Port 0 is an 8-bit open drain bidirectional I/O port. As an
output port each pin can sink eight TTL inputs. When 1s
are written to port 0 pins, the pins can be used as highimpedance inputs.
Port 0 may also be configured to be the multiplexed loworder address/data bus during accesses to external program and data memory. In this mode P0 has internal pullups.
Port 0 also receives the code bytes during QuickFlash programming, and outputs the code bytes during program verification. External pullups 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 sink/source four TTL inputs.
When 1s are written to Port 1 pins they are pulled high by
the internal pullups and can be used as inputs. As inputs,
Port 1 pins that are externally being pulled low will source
current (IIL) because of the internal pullups.
Port 1 also receives the low-order address bytes during
QuickFlash programming and verification.
Port 2
Port 2 is an 8-bit bidirectional I/O port with internal pullups.
The Port 2 output buffers can sink/source four TTL inputs.
When 1s are written to Port 2 pins they are pulled high by
the internal pullups and can be used as inputs. As inputs,
Port 2 pins that are externally being pulled low will source
current (IIL) 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 1s. During 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 and some
control signals during QuickFlash programming and verification.
Port 3
Port 3 is an 8-bit bidirectional I/O port with internal pullups.
The Port 3 output buffers can sink/source four TTL inputs.
When 1s are written to Port 3 pins they are pulled high by
the internal pullups and can be used as inputs. As inputs,
Port 3 pins that are externally being pulled low will source
current (IIL) because of the pullups.
Port 3 also serves the functions of various special features
of the AT87F51 as listed below:
Port Pin
Alternate Functions
P3.0
RXD (serial input port)
P3.1
TXD (serial output port)
P3.2
INT0 (external interrupt 0)
P3.3
INT1 (external interrupt 1)
P3.4
T0 (timer 0 external input)
P3.5
T1 (timer 1 external input)
P3.6
WR (external data memory write strobe)
P3.7
RD (external data memory read strobe)
Port 3 also receives some control signals for QuickFlash
programming and verification.
RST
Reset input. A high on this pin for two machine cycles while
the oscillator is running resets the device.
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 QuickFlash programming.
In normal operation ALE is emitted at a constant rate of 1/6
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.
If desired, ALE operation can be disabled by setting bit 0 of
SFR location 8EH. With the bit set, ALE is active only during a MOVX or MOVC instruction. Otherwise, the pin is
weakly pulled high. Setting the ALE-disable bit has no
effect if the microcontroller is in external execution mode.
PSEN
Program Store Enable is the read strobe to external program memory.
3
When the AT87F51 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.
EA/VPP
External Access Enable. EA must be strapped to GND in
order to enable the device to fetch code from external program memory locations starting at 0000H up to FFFFH.
Note, however, that if lock bit 1 is programmed, EA will be
internally latched on reset.
EA should be strapped to VCC for internal program executions.
This pin also receives the 12-volt programming enable voltage (VPP) during QuickFlash programming.
It should be noted that when idle is terminated by a hard
ware reset, the device normally resumes program execution, from where it left off, up to two machine cycles before
the internal reset algorithm takes control. On-chip 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 to a port pin 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.
Figure 1. Oscillator Connections
C2
XTAL2
XTAL1
Input to the inverting oscillator amplifier and input to the
internal clock operating circuit.
C1
XTAL1
XTAL2
Output from the inverting oscillator amplifier.
GND
Oscillator Characteristics
XTAL1 and XTAL2 are the input and output, respectively,
of an inverting amplifier which can be configured for use as
an on-chip oscillator, as shown in Figure 1. Either a quartz
crystal or ceramic resonator may be used. To drive the
device from an external clock source, XTAL2 should be left
unconnected while XTAL1 is driven as shown in Figure 2.
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 voltage high and low time specifications must be
observed.
Note:
C1, C2 = 30 pF ± 10 pF for Crystals
= 40 pF ± 10 pF for Ceramic Resonators
Figure 2. External Clock Drive Configuration
Idle Mode
In idle mode, the CPU puts itself to sleep while all the onchip peripherals remain active. The mode is invoked by
software. The content of the on-chip RAM and all the special functions registers remain unchanged during this
mode. The idle mode can be terminated by any enabled
interrupt or by a hardware reset.
Status of External Pins During Idle and Power Down Modes
Mode
Program Memory
ALE
PSEN
PORT0
PORT1
PORT2
PORT3
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
4
Not
Not
Power Down Mode
Program Memory Lock Bits
In the power down mode the oscillator is stopped, and the
instruction that invokes power down is the last instruction
executed. The on-chip RAM and Special Function Registers retain their values until the power down mode is terminated. The only exit from power down is a hardware reset.
Reset redefines the SFRs but does not change the on-chip
RAM. The reset should not be activated before V CC is
restored to its normal operating level and must be held
active long enough to allow the oscillator to restart and stabilize.
On the chip are three lock bits which can be left unprogrammed (U) or can be programmed (P) to obtain the additional features listed in the table below:
When lock bit 1 is programmed, the logic level at the EA pin
is sampled and latched during reset. If the device is powered up without a reset, the latch initializes to a random
value, and holds that value until reset is activated. It is necessary that the latched value of EA be in agreement with
the current logic level at that pin in order for the device to
function properly.
Lock Bit Protection Modes
Program Lock Bits
Protection Type
LB1
LB2
LB3
1
U
U
U
No program lock features.
2
P
U
U
MOVC instructions executed from external program memory are disabled from fetching code
bytes from internal memory, EA is sampled and latched on reset, and further programming of the
QuickFlash is disabled.
3
P
P
U
Same as mode 2, also verify is disabled.
4
P
P
P
Same as mode 3, also external execution is disabled.
Programming the QuickFlash
The AT87F51 is shipped with the on-chip QuickFlash memory array ready to be programmed. The programming interface needs a high-voltage (12-volt) program enable signal
and is compatible with conventional third-party Flash or
EPROM programmers.
The AT87F51 code memory array is programmed byte-bybyte.
Programming Algorithm: Before programming the
AT87F51, the address, data, and control signals should be
set up according to the QuickFlash programming mode
table and Figures 3 and 4. To program the AT87F51, take
the following steps:
1. Input the desired memory location on the address
lines.
2. Input the appropriate data byte on the data lines.
3. Activate the correct combination of control signals.
4. Raise EA/VPP to 12V.
5. Pulse ALE/PROG once to program a byte in the QuickFlash array or the lock bits. The byte-write cycle is selftimed and typically takes no more than 1.5 ms. Repeat
steps 1 through 5, changing the address and data for
the entire array or until the end of the object file is
reached.
Data Polling: The AT87F51 features Data Polling to indicate the end of a write cycle. During a write cycle, an
attempted read of the last byte written will result in the complement of the written datum on PO.7. Once the write cycle
has been completed, true data are valid on all outputs, and
the next cycle may begin. Data Polling may begin any time
after a write cycle has been initiated.
Ready/Busy: The progress of byte programming can also
be monitored by the RDY/BSY output signal. P3.4 is pulled
low after ALE goes high during programming to indicate
BUSY. P3.4 is pulled high again when programming is
done to indicate READY.
Program Verify: If lock bits LB1 and LB2 have not been
programmed, the programmed code data can be read back
via the address and data lines for verification. The lock bits
cannot be verified directly. Verification of the lock bits is
achieved by observing that their features are enabled.
Reading the Signature Bytes: The signature bytes are
read by the same procedure as a normal verification of
locations 030H, 031H, and 032H, except that P3.6 and
P3.7 must be pulled to a logic low. The values returned are
as follows.
(030H) = 1EH indicates manufactured by Atmel
(031H) = 87H indicates 87F family
(032H) = 01H indicates 87F51
5
Programming Interface
Every code byte in the QuickFlash array can be programmed by using the appropriate combination of control
signals. The write operation cycle is self-timed and once
initiated, will automatically time itself to completion.
All major programming vendors offer worldwide support for
the Atmel microcontroller series. Please contact your local
programming vendor for the appropriate software revision.
QuickFlash Programming Modes
RST
PSEN
Write Code Data
H
L
Read Code Data
H
L
Bit - 1
H
Bit - 2
Bit - 3
Mode
Write Lock
Read Signature Byte
ALE/PROG
EA/VPP
P2.6
P2.7
P3.6
P3.7
12V
L
H
H
H
H
L
L
H
H
L
12V
H
H
H
H
H
L
12V
H
H
L
L
H
L
12V
H
L
H
L
H
L
H
L
L
L
L
H
H
Figure 3. Programming the QuickFlash Memory
Figure 4. Verifying the QuickFlash Memory
+5V
+5V
AT87F51
A0 - A7
ADDR.
OOOOH/OFFFH
A8 - A11
P1
P2.0 - P2.3
AT87F51
VCC
P0
PGM
DATA
A0 - A7
ADDR.
OOOOH/0FFFH
P2.7
ALE
PROG
SEE FLASH
PROGRAMMING
MODES TABLE
P0
P2.7
EA
VIH/VPP
3-24 MHz
PGM DATA
(USE 10K
PULLUPS)
ALE
P3.6
VIH
P3.7
P3.7
XTAL2
EA
XTAL1
RST
3-24 MHz
XTAL1
GND
6
P2.0 - P2.3
P2.6
P3.6
XTAL2
VCC
A8 - A11
P2.6
SEE FLASH
PROGRAMMING
MODES TABLE
P1
RST
PSEN
Not
VIH
GND
PSEN
VIH
Not
QuickFlash Programming and Verification Characteristics
TA = 0°C to 70°C, VCC = 5.0 ± 10%
Symbol
Parameter
Min
Max
Units
VPP
Programming Enable Voltage
11.5
12.5
V
IPP
Programming Enable Current
1.0
mA
1/tCLCL
Oscillator Frequency
24
MHz
tAVGL
Address Setup to PROG Low
48tCLCL
tGHAX
Address Hold After PROG
48tCLCL
tDVGL
Data Setup to PROG Low
48tCLCL
tGHDX
Data Hold After PROG
48tCLCL
tEHSH
P2.7 (ENABLE) High to VPP
48tCLCL
tSHGL
VPP Setup to PROG Low
10
µs
tGHSL(1)
VPP Hold After PROG
10
µs
tGLGH
PROG Width
tAVQV
Address to Data Valid
48tCLCL
tELQV
ENABLE Low to Data Valid
48tCLCL
tEHQZ
Data Float After ENABLE
tGHBL
PROG High to BUSY Low
1.0
µs
tWC
Byte Write Cycle Time
2.0
ms
3
1
0
110
µs
48tCLCL
7
QuickFlash Programming and Verification Waveforms
PROGRAMMING
ADDRESS
P1.0 - P1.7
P2.0 - P2.3
VERIFICATION
ADDRESS
tAVQV
PORT 0
DATA IN
tDVGL
tAVGL
tGHDX
DATA OUT
tGHAX
ALE/PROG
tSHGL
tGLGH
VPP
tGHSL
LOGIC 1
LOGIC 0
EA/VPP
tEHSH
tEHQZ
tELQV
P2.7
(ENABLE)
tGHBL
P3.4
(RDY/BSY)
BUSY
tWC
8
Not
READY
Not
Absolute Maximum Ratings*
Operating Temperature.................................. -55°C to +125°C
*NOTICE:
Storage Temperature ..................................... -65°C to +150°C
Voltage on Any Pin
with Respect to Ground .....................................-1.0V to +7.0V
Maximum Operating Voltage ............................................ 6.6V
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect device
reliability.
DC Output Current...................................................... 15.0 mA
DC Characteristics
TA = -40°C to 85°C, VCC = 5.0V ± 20% (unless otherwise noted)
Symbol
Parameter
Condition
Min
Max
Units
VIL
Input Low Voltage
(Except EA)
-0.5
0.2 VCC - 0.1
V
VIL1
Input Low Voltage (EA)
-0.5
0.2 VCC - 0.3
V
VIH
Input High Voltage
0.2 VCC + 0.9
VCC + 0.5
V
VIH1
Input High Voltage
0.7 VCC
VCC + 0.5
V
IOL = 1.6 mA
0.45
V
0.45
V
VOL
(Except XTAL1, RST)
(XTAL1, RST)
Output Low Voltage
(1)
(Ports 1,2,3)
Voltage(1)
VOL1
Output Low
(Port 0, ALE, PSEN)
IOL = 3.2 mA
VOH
Output High Voltage
(Ports 1,2,3, ALE, PSEN)
IOH = -60 µA, VCC = 5V ± 10%
VOH1
Output High Voltage
(Port 0 in External Bus Mode)
2.4
V
IOH = -25 µA
0.75 VCC
V
IOH = -10 µA
0.9 VCC
V
2.4
V
IOH = -300 µA
0.75 VCC
V
IOH = -80 µA
0.9 VCC
V
IOH = -800 µA, VCC = 5V ± 10%
IIL
Logical 0 Input Current (Ports 1,2,3)
VIN = 0.45V
-50
µA
ITL
Logical 1 to 0 Transition Current
(Ports 1,2,3)
VIN = 2V, VCC = 5V ± 10%
-650
µA
ILI
Input Leakage Current (Port 0, EA)
0.45 < VIN < VCC
±10
µA
RRST
Reset Pulldown Resistor
300
KΩ
CIO
Pin Capacitance
Test Freq. = 1 MHz, TA = 25°C
10
pF
ICC
Power Supply Current
Active Mode, 12 MHz
20
mA
Idle Mode, 12 MHz
5
mA
VCC = 6V
100
µA
VCC = 3V
40
µA
Power Down Mode
Notes:
(2)
50
1. Under steady state (non-transient) conditions, IOL must be externally limited as follows:
Maximum IOL per port pin: 10 mA
Maximum IOL per 8-bit port: Port 0: 26 mA
Ports 1, 2, 3: 15 mA
Maximum total IOL for all output pins: 71 mA
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.
2. Minimum VCC for Power Down is 2V.
9
AC Characteristics
(Under Operating Conditions; Load Capacitance for Port 0, ALE/PROG, and PSEN = 100 pF; Load Capacitance for all other
outputs = 80 pF)
External Program and Data Memory Characteristics
Symbol
Parameter
12 MHz Oscillator
Min
Max
Variable Oscillator
Min
Max
0
24
Units
1/tCLCL
Oscillator Frequency
tLHLL
ALE Pulse Width
127
2tCLCL-40
ns
tAVLL
Address Valid to ALE Low
43
tCLCL-13
ns
tLLAX
Address Hold After ALE Low
48
tCLCL-20
ns
tLLIV
ALE Low to Valid Instruction In
tLLPL
ALE Low to PSEN Low
43
tCLCL-13
ns
tPLPH
PSEN Pulse Width
205
3tCLCL-20
ns
tPLIV
PSEN Low to Valid Instruction In
tPXIX
Input Instruction Hold After PSEN
tPXIZ
Input Instruction Float After PSEN
tPXAV
PSEN to Address Valid
tAVIV
Address to Valid Instruction In
312
5tCLCL-55
ns
tPLAZ
PSEN Low to Address Float
10
10
ns
tRLRH
RD Pulse Width
400
6tCLCL-100
ns
tWLWH
WR Pulse Width
400
6tCLCL-100
ns
tRLDV
RD Low to Valid Data In
tRHDX
Data Hold After RD
tRHDZ
Data Float After RD
97
2tCLCL-28
ns
tLLDV
ALE Low to Valid Data In
517
8tCLCL-150
ns
tAVDV
Address to Valid Data In
585
9tCLCL-165
ns
tLLWL
ALE Low to RD or WR Low
200
3tCLCL+50
ns
tAVWL
Address to RD or WR Low
203
4tCLCL-75
ns
tQVWX
Data Valid to WR Transition
23
tCLCL-20
ns
tQVWH
Data Valid to WR High
433
7tCLCL-120
ns
tWHQX
Data Hold After WR
33
tCLCL-20
ns
tRLAZ
RD Low to Address Float
tWHLH
RD or WR High to ALE High
10
233
4tCLCL-65
145
0
3tCLCL-45
0
59
75
tCLCL-8
0
5tCLCL-90
3tCLCL-50
0
Not
43
123
tCLCL-20
ns
ns
ns
0
300
ns
ns
tCLCL-10
252
MHz
ns
ns
0
ns
tCLCL+25
ns
Not
External Program Memory Read Cycle
tLHLL
ALE
tAVLL
tLLIV
tLLPL
tPLIV
PSEN
tPXAV
tPLAZ
tPXIZ
tLLAX
tPXIX
A0 - A7
PORT 0
tPLPH
INSTR IN
A0 - A7
tAVIV
PORT 2
A8 - A15
A8 - A15
External Data Memory Read Cycle
tLHLL
ALE
tWHLH
PSEN
tLLDV
tRLRH
tLLWL
RD
tLLAX
tAVLL
PORT 0
tRLDV
tRLAZ
A0 - A7 FROM RI OR DPL
tRHDZ
tRHDX
DATA IN
A0 - A7 FROM PCL
INSTR IN
tAVWL
tAVDV
PORT 2
P2.0 - P2.7 OR A8 - A15 FROM DPH
A8 - A15 FROM PCH
11
External Data Memory Write Cycle
tLHLL
ALE
tWHLH
PSEN
tLLWL
WR
tAVLL
tLLAX
tQVWX
A0 - A7 FROM RI OR DPL
PORT 0
tWLWH
tQVWH
DATA OUT
tWHQX
A0 - A7 FROM PCL
INSTR IN
tAVWL
PORT 2
P2.0 - P2.7 OR A8 - A15 FROM DPH
A8 - A15 FROM PCH
External Clock Drive Waveforms
tCHCX
tCHCX
tCLCH
VCC - 0.5V
tCHCL
0.7 VCC
0.2 VCC - 0.1V
0.45V
tCLCX
tCLCL
External Clock Drive
Symbol
Parameter
1/tCLCL
Oscillator Frequency
tCLCL
Clock Period
tCHCX
Min
Max
Units
0
24
MHz
41.6
ns
High Time
15
ns
tCLCX
Low Time
15
ns
tCLCH
Rise Time
20
ns
tCHCL
Fall Time
20
ns
12
Not
Not
Serial Port Timing: Shift Register Mode Test Conditions
(VCC = 5.0 V ± 20%; Load Capacitance = 80 pF)
Symbol
Parameter
12 MHz Osc
Min
Variable Oscillator
Max
Min
Units
Max
tXLXL
Serial Port Clock Cycle Time
1.0
12tCLCL
µs
tQVXH
Output Data Setup to Clock Rising Edge
700
10tCLCL-133
ns
tXHQX
Output Data Hold After Clock Rising Edge
50
2tCLCL-117
ns
tXHDX
Input Data Hold After Clock Rising Edge
0
0
ns
tXHDV
Clock Rising Edge to Input Data Valid
700
10tCLCL-133
ns
Shift Register Mode Timing Waveforms
INSTRUCTION
ALE
0
1
2
3
4
5
6
7
8
tXLXL
CLOCK
tQVXH
WRITE TO SBUF
tXHQX
0
1
tXHDV
OUTPUT DATA
CLEAR RI
VALID
2
3
4
5
6
tXHDX
VALID
SET TI
VALID
VALID
VALID
VALID
VALID
AC Testing Input/Output Waveforms(1)
Note:
1.
Float Waveforms(1)
V LOAD+
0.2 VCC + 0.9V
TEST POINTS
0.45V
VALID
SET RI
INPUT DATA
VCC - 0.5V
7
V LOAD -
Note:
1.
V OL -
0.1V
V OL +
0.1V
Timing Reference
Points
V LOAD
0.2 VCC - 0.1V
AC Inputs during testing are driven at VCC - 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 VIL
max. for a logic 0.
0.1V
0.1V
For timing purposes, a port pin is no longer floating
when a 100 mV change from load voltage occurs. A
port pin begins to float when 100 mV change from
the loaded VOH/VOL level occurs.
13
Ordering Information
Speed
(MHz)
Power
Supply
12
5V ± 20%
16
20
24
5V ± 20%
5V ± 20%
5V ± 20%
Ordering Code
Package
AT87F51-12AC
44A
Commercial
AT87F51-12JC
44J
(0° C to 70° C)
AT87F51-12PC
40P6
AT87F51-12AI
44A
Industrial
AT87F51-12JI
44J
(-40° C to 85° C)
AT87F51-12PI
40P6
AT87F51-16AC
44A
Commercial
AT87F51-16JC
44J
(0° C to 70° C)
AT87F51-16PC
40P6
AT87F51-16AI
44A
Industrial
AT87F51-16JI
44J
(-40° C to 85° C)
AT87F51-16PI
40P6
AT87F51-20AC
44A
Commercial
AT87F51-20JC
44J
(0° C to 70° C)
AT87F51-20PC
40P6
AT87F51-20AI
44A
Industrial
AT87F51-20JI
44J
(-40° C to 85° C)
AT87F51-20PI
40P6
AT87F51-24AC
44A
Commercial
AT87F51-24JC
44J
(0° C to 70° C)
AT87F51-24PC
40P6
AT87F51-24AI
44A
Industrial
AT87F51-24JI
44J
(-40° C to 85° C)
AT87F51-24PI
40P6
Package Type
44A
44-Lead, Thin Plastic Gull Wing Quad Flatpack (TQFP)
44J
44-Lead, Plastic J-Leaded Chip Carrier (PLCC)
40P6
40-Lead, 0.600” Wide, Plastic Dual Inline Package (PDIP)
14
Operation Range
Not
Not
Packaging Information
44A, 44-Lead, Thin (1.0 mm) Plastic Gull Wing Quad
Flat Package (TQFP)
Dimensions in Millimeters and (Inches)*
44J, 44-Lead, Plastic J-Leaded Chip Carrier (PLCC)
Dimension in Inches and (Millimeters)
JEDEC STANDARD MS-018 AC
.045(1.14) X 45°
12.21(0.478)
SQ
11.75(0.458)
PIN 1 ID
0.45(0.018)
0.30(0.012)
0.80(0.031) BSC
PIN NO. 1
IDENTIFY
.045(1.14) X 30° - 45°
.032(.813)
.026(.660)
.695(17.7)
SQ
.685(17.4)
.500(12.7) REF SQ
.021(.533)
.013(.330)
.043(1.09)
.020(.508)
.120(3.05)
.090(2.29)
.180(4.57)
.165(4.19)
1.20(0.047) MAX
0
7
0.20(.008)
0.09(.003)
.630(16.0)
.590(15.0)
.656(16.7)
SQ
.650(16.5)
.050(1.27) TYP
10.10(0.394)
SQ
9.90(0.386)
.012(.305)
.008(.203)
.022(.559) X 45° MAX (3X)
0.75(0.030)
0.45(0.018)
0.15(0.006)
0.05(0.002)
*Controlling dimension: millimeters
40P6, 40-Lead, 0.600” Wide, Plastic Dual Inline
Package (PDIP)
Dimensions in Inches and (Millimeters)
JEDEC STANDARD MS-011 AC
2.07(52.6)
2.04(51.8)
PIN
1
.566(14.4)
.530(13.5)
.090(2.29)
MAX
1.900(48.26) REF
.220(5.59)
MAX
.005(.127)
MIN
SEATING
PLANE
.065(1.65)
.015(.381)
.022(.559)
.014(.356)
.161(4.09)
.125(3.18)
.110(2.79)
.090(2.29)
.012(.305)
.008(.203)
.065(1.65)
.041(1.04)
.630(16.0)
.590(15.0)
0 REF
15
.690(17.5)
.610(15.5)
15
Atmel Headquarters
Atmel Operations
Corporate Headquarters
Atmel Colorado Springs
2325 Orchard Parkway
San Jose, CA 95131
TEL (408) 441-0311
FAX (408) 487-2600
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Riverside Way
Camberley, Surrey GU15 3YL
England
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FAX (44) 1276-686697
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TEL (33) 4 42 53 60 00
FAX (33) 4 42 53 60 01
Asia
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TEL (852) 27219778
FAX (852) 27221369
Japan
Atmel Japan K.K.
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1-24-8 Shinkawa
Chuo-ku, Tokyo 104-0033
Japan
TEL (81) 3-3523-3551
FAX (81) 3-3523-7581
Fax-on-Demand
North America:
1-(800) 292-8635
International:
1-(408) 441-0732
e-mail
[email protected]
Web Site
http://www.atmel.com
BBS
1-(408) 436-4309
© Copyright Atmel Corporation 1998.
Atmel Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in an Atmel Corporation product.
No other circuit patent licenses are implied. Atmel Corporation’s products are not authorized for use as critical components in life support
devices or systems.
Terms and product names in this document may be trademarks of others.
Printed on recycled paper.
1012A–1/98/15M