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Part: 80C451
Category:
Microcontrollers
-> CISC->8051/80C51 Family->EPROM/OTP
Description: 80C451/83C451/87C451; 80C51 8-bit Microcontroller Family 4K/128 OTP/ROM/ROMless, Expanded I/o
Company: Philips Semiconductors
Datasheet: Download 80C451 datasheet File size : 1927 kB
Request For quote: Find where to buy 80C451
Datasheet text preview:
INTEGRATED CIRCUITS
80C451/83C451/87C451 80C51 8-bit microcontroller family
4K/128 OTP/ROM/ROMless, expanded I/O
Product specification Supersedes data of 1998 Jan 19 IC20 Data Handbook 1998 May 01
Philips Semiconductors
Philips Semiconductors
Product specification
80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless, expanded I/O
80C451/83C451/87C451
DESCRIPTION
The Philips 8XC451 is an I/O expanded single-chip microcontroller fabricated with Philips high-density CMOS technology. Philips epitaxial substrate minimizes latch-up sensitivity. The 8XC451 (includes the 80C451, 87C451 and 83C451) is a functional extension of the 87C51 microcontroller with three additional I/O ports and four I/O control lines for a total of 68 pins. Four control lines associated with port 6 facilitate high-speed asynchronous I/O functions. The 8XC451 includes a 4k × 8 ROM (83C451) EPROM (87C451), a 128 × 8 RAM, 56 I/O, two 16-bit timer/counters, a five source, two priority level, nested interrupt structure, a serial I/O port for either a full duplex UART, I/O expansion, or multi-processor communications, and on-chip oscillator and clock circuits. The 80C451 ROMless version includes all of the 83C451 features except the on-board 4k × 8 ROM. The 87C451 has 4k of EPROM on-chip as program memory and is otherwise identical to the 83C451. The 8XC451 has two software selectable modes of reduced activity for further power reduction; idle mode and power-down mode. Idle mode freezes the CPU while allowing the RAM, timers, serial port, and interrupt system to continue functioning. Power-down mode freezes the oscillator, causing all other chip functions to be inoperative while maintaining the RAM contents.
PIN CONFIGURATION
9 1 61
10
60
LCC
26
44
27 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Function EA/VPP P2.0/A8 P2.1/A9 P2.2/A10 P2.3/A11 P2.4/A12 P2.5/A13 P2.6/A14 P2.7/A15 P0.7/AD7 P0.6/AD6 P0.5/AD5 P0.4/AD4 P0.3/AD3 P0.2/AD2 P0.1/AD1 P0.0/AD0 VCC P4.7 P4.6 P4.5 P4.4 P4.3 Pin 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Function P4.2 P4.1 P4.0 P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 RST P3.0/RxD P3.1/TxD P3.2/INT0 P3.3/INT1 P3.4/T0 P3.5/T1 P3.6/WR P3.7/RD P5.0 P5.1 P5.2
43 Pin 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 Function P5.3 P5.4 P5.5 P5.6 P5.7 XTAL2 XTAL1 V SS ODS IDS BFLAG AFLAG P6.0 P6.1 P6.2 P6.3 P6.4 P6.5 P6.6 P6.7 PSEN ALE/PROG
FEATURES
· 80C51 based architecture · Seven 8-bit I/O ports · Port 6 features:
Eight data pins Four control pins Direct MPU bus interface Parallel printer interface
SU00084A
· On the microcontroller:
4k × 8 ROM (83C451) 4k × 8 EPROM (87C451) ROMless version (80C451) 128 × 8 RAM Two 16-bit counter/timers Two external interrupts
· External memory addressing capability
64k ROM and 64k RAM
· Low power consumption:
Normal operation: less than 24mA at 5V, 12MHz Idle mode Power-down mode
1998 May 01
2
853-0830 19327
Philips Semiconductors
Product specification
80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless, expanded I/O
80C451/83C451/87C451
BLOCK DIAGRAM
P0.0P0.7 P2.0P2.7 P4.0P4.7 P5.05.7
PORT 0 DRIVERS V CC VS S RAM ADDR REGISTER RAM PORT 0 LATCH
PORT 2 DRIVERS
PORT 4 DRIVERS
PORT 5 DRIVERS
PORT 2 LATCH
PORT 4 LATCH
PORT 5 LATCH
4K x 8 ROM/EPROM
B REGISTER
ACC
STACK POINTER
TMP2
TMP1
PROGRAM ADDRESS REGISTER
BUFFER ALU PCON TL1 PSW SBUF IE IP INTERRUPT, SERIAL PORT AND TIMER BLOCKS PC INCREMENTER SCON TH0 TMOD TL0 TCON TH1
PROGRAM COUNTER PSEN ALE/PROG EAVPP RST PD TIMING AND CONTROL INSTRUCTION REGISTER
DPTR
PORT 1 LATCH
PORT 6 LATCH
PORT 3 LATCH
OSCILLATOR PORT 1 DRIVERS XTAL1 XTAL2 PORT 6 DRIVERS PORT 6 CONTROL/STATUS PORT 3 DRIVERS
P1.0P1.7
P6.0P6.7
IDS ODS BFLAG AFLAG
P3.0P3.7
SU00086
1998 May 01
3
Philips Semiconductors
Product specification
80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless, expanded I/O
80C451/83C451/87C451
ORDERING INFORMATION
ROMless SC80C451CCA68 SC80C451CGA68 ROM SC83C451CCA68 SC83C451CGA68 EPROM1 SC87C451CCA68 SC87C451CGA68 OTP OTP TEMPERATURE RANGE °C AND PACKAGE 0 to +70, Plastic Leaded Chip Carrier, 0 to +70, Plastic Leaded Chip Carrier FREQ MHz 3.5 to 12 3.5 to 16 DRAWING NUMBER SOT188-3 SOT188-3
NOTE: 1. OTP = One Time Programmable
LOGIC SYMBOL
V CC XTAL1 PORT 0 ADDRESS AND DATA BUS VS S
XTAL2
SECONDARY FUNCTIONS
RST EA/VPP PSEN ALE/PROG RxD TxD INT0 INT1 T0 T1 WR RD
PORT 3
PORT 2
PORT 1
ADDRESS BUS
PORT 6 CONTROL
ODS IDS BFLAG AFLAG
PORT 6
PORT 5
PORT 4
SU00085
1998 May 01
4
Philips Semiconductors
Product specification
80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless, expanded I/O
80C451/83C451/87C451
PIN DESCRIPTION
MNEMONIC VSS VCC P0.00.7 PIN NO. 54 18 17-10 TYPE I I I/O NAME AND FUNCTION Ground: 0V reference. Power Supply: This is the power supply voltage for normal, idle, and power-down operation. Port 0: Port 0 is an open-drain, bidirectional I/O port. Port 0 is also the multiplexed data and low-order address bus during accesses to external memory. External pull-ups are required during program verification. Port 0 can sink/source eight LS TTL inputs. Port 1: Port 1 is an 8-bit bidirectional I/O port with internal pull-ups. Port 1 receives the low-order address bytes during program memory verification. Port 1 can sink/source three LS TTL inputs, and drive CMOS inputs without external pull-ups. Port 2: Port 2 is an 8-bit bidirectional I/O port with internal pull-ups. Port 2 emits the high-order address bytes during access to external memory and receives the high-order address bits and control signals during program verification. Port 2 can sink/source three LS TTL inputs, and drive CMOS inputs without external pull-ups. Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 can sink/source three LS TTL inputs, and drive CMOS inputs without external pull-ups. Port 3 also serves the special functions listed below: RxD (P3.0): Serial input port TxD (P3.1): Serial output port INT0 (P3.2): External interrupt INT1 (P3.3): External interrupt T0 (P3.4): Timer 0 external input T1 (P3.5): Timer 1 external input WR (P3.6): External data memory write strobe RD (P3.7): External data memory read strobe Port 4: Port 4 is a 8-bit (LCC) bidirectional I/O port with internal pull-ups. Port 4 can sink/source three LS TTL inputs and drive CMOS inputs without external pull-ups. Port 5: Port 5 is a 8-bit (LCC) bidirectional I/O port with internal pull-ups. Port 5 can sink/source three LS TTL inputs and drive CMOS inputs without external pull-ups. Port 6: Port 6 is a specialized 8-bit bidirectional I/O port with internal pull-ups. This special port can sink/source three LS TTL inputs and drive CMOS inputs without external pull-ups. Port 6 can be used in a strobed or non-strobed mode of operation. Port 6 works in conjunction with four control pins that serve the functions listed below: ODS: Output data strobe IDS: Input data strobe BFLAG: Bidirectional I/O pin with internal pull-ups AFLAG: Bidirectional I/O pin with internal pull-ups Reset: A high on this pin for two machine cycles while the oscillator is running, resets the device. An internal pull-down resistor permits a power-on reset using only an external capacitor connected to VCC. Address Latch Enable/Program Pulse: Output pulse for latching the low byte of the address during an access to external memory. ALE is activated at a constant rate of 1/6 the oscillator frequency except during an external data memory access, at which time one ALE is skipped. ALE can sink/source three LS TTL inputs and drive CMOS inputs without external pull-ups. This pin is also the program pulse during EPROM programming. Program Store Enable: The read strobe to external program memory. PSEN is activated twice each machine cycle during fetches from external program memory. However, when executing out of external program memory, two activations of PSEN are skipped during each access to external program memory. PSEN is not activated during fetches from internal program memory. PSEN can sink/source eight LS TTL inputs and drive CMOS inputs without an external pull-up. This pin should be tied low during programming. Instruction Execution Control/Programming Supply Voltage: When EA is held high, the CPU executes out of internal program memory, unless the program counter exceeds 0FFFH. When EA is held low, the CPU executes out of external program memory. EA must never be allowed to float. This pin also receives the 12.75V programming supply voltage (VPP) during EPROM programming. Crystal 1: Input to the inverting oscillator amplifier that forms the oscillator. This input receives the external oscillator when an external oscillator is used. Crystal 2: An output of the inverting amplifier that forms the oscillator. This pin should be floated when an external oscillator is used.
P1.0P1.7
27-34
I/O
P2.0P2.7
2-9
I/O
P3.0P3.7
36-43
I/O
36 37 38 39 40 41 42 43 P4.0P4.7 P5.0P5.7 P6.0P6.7 26-19 44-51 59-66
I O I I I I O O I/O I/O I/O
ODS IDS BFLAG AFLAG RST ALE/PROG
55 56 57 58 35 68
I I I/O I/O I I/O
PSEN
67
O
EA/VPP
1
I
XTAL1 XTAL2
53 52
I O
1998 May 01
5
Others parts begin by 80
80-1 80-2 80-3
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