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P87C51RA2 데이터시트 PDF




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부품번호 P87C51RA2 기능
기능 80C51 8-bit microcontroller family
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P87C51RA2 데이터시트, 핀배열, 회로
INTEGRATED CIRCUITS
P87C51RA2/RB2/RC2/RD2
80C51 8-bit microcontroller family
8KB/16KB/32KB/64KB OTP, 512B/512B/512B/1KB RAM,
low voltage (2.7 to 5.5 V), low power, high speed
(30/33 MHz)
Product data
Supersedes data of 2002 Oct 28
2003 Jan 24
Philips
Semiconductors




P87C51RA2 pdf, 반도체, 판매, 대치품
Philips Semiconductors
80C51 8-bit microcontroller family 8KB/16KB/32KB/64KB OTP
with 512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high
speed (30/33 MHz)
BLOCK DIAGRAM 1
Product data
P87C51RA2/RB2/RC2/RD2
ACCELERATED 80C51 CPU
(12-CLK MODE, 6-CLK MODE)
CRYSTAL OR
RESONATOR
8K / 16K / 32K /
64 KBYTE
CODE OTP
512 / 1024 BYTE
DATA RAM
PORT 3
CONFIGURABLE I/Os
PORT 2
CONFIGURABLE I/Os
PORT 1
CONFIGURABLE I/Os
PORT 0
CONFIGURABLE I/Os
OSCILLATOR
FULL-DUPLEX
ENHANCED UART
TIMER 0
TIMER 1
TIMER 2
PROGRAMMABLE
COUNTER ARRAY
(PCA)
WATCHDOG TIMER
su01657
2003 Jan 24
4

4페이지










P87C51RA2 전자부품, 판매, 대치품
Philips Semiconductors
80C51 8-bit microcontroller family 8KB/16KB/32KB/64KB OTP
with 512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high
speed (30/33 MHz)
Product data
P87C51RA2/RB2/RC2/RD2
PIN DESCRIPTIONS
PIN NUMBER
MNEMONIC
PDIP PLCC LQFP
VSS 20 22 16
VCC 40 44 38
P0.0–0.7
39–32 43–36 37–30
P1.0–P1.7
1–8
2–9 40–44,
1–3
P2.0–P2.7
1
2
3
4
5
6
7
8
21–28
2
3
4
5
6
7
8
9
24–31
40
41
42
43
44
1
2
3
18–25
P3.0–P3.7
10–17
11, 5, 7–13
13–19
RST
ALE
10 11
5
11 13
7
12 14
8
13 15
9
14 16 10
15 17 11
16 18 12
17 19 13
9 10 4
30 33 27
TYPE
NAME AND FUNCTION
I Ground: 0 V reference.
I Power Supply: This is the power supply voltage for normal, idle, and power-down
operation.
I/O Port 0: Port 0 is an open-drain, bidirectional I/O port. Port 0 pins that have 1s
written to them float and 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 pull-ups when emitting 1s.
I/O Port 1: Port 1 is an 8-bit bidirectional I/O port with internal pull-ups on all pins.
Port 1 pins that have 1s written to them are pulled high by the internal pull-ups and
can be used as inputs. As inputs, port 1 pins that are externally pulled low will
source current because of the internal pull-ups. (See DC Electrical Characteristics:
IIL).
Alternate functions for P87C51RA2/RB2/RC2/RD2 Port 1 include:
I/O T2 (P1.0): Timer/Counter 2 external count input/Clockout (see Programmable
Clock-Out)
I T2EX (P1.1): Timer/Counter 2 Reload/Capture/Direction Control
I ECI (P1.2): External Clock Input to the PCA
I/O CEX0 (P1.3): Capture/Compare External I/O for PCA module 0
I/O CEX1 (P1.4): Capture/Compare External I/O for PCA module 1
I/O CEX2 (P1.5): Capture/Compare External I/O for PCA module 2
I/O CEX3 (P1.6): Capture/Compare External I/O for PCA module 3
I/O CEX4 (P1.7): Capture/Compare External I/O for PCA module 4
I/O Port 2: Port 2 is an 8-bit bidirectional I/O port with internal pull-ups. Port 2 pins that
have 1s written to them are pulled high by the internal pull-ups and can be used as
inputs. As inputs, port 2 pins that are externally being pulled low will source current
because of the internal pull-ups. (See DC Electrical Characteristics: IIL). 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 pull-ups when emitting 1s.
During accesses to external data memory that use 8-bit addresses (MOV @Ri),
port 2 emits the contents of the P2 special function register.
I/O Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that
have 1s written to them are pulled high by the internal pull-ups and can be used as
inputs. As inputs, port 3 pins that are externally being pulled low will source current
because of the pull-ups. (See DC Electrical Characteristics: IIL). Port 3 also serves
the special features of the P87C51RA2/RB2/RC2/RD2, as listed below:
I RxD (P3.0): Serial input port
O TxD (P3.1): Serial output port
I INT0 (P3.2): External interrupt
I INT1 (P3.3): External interrupt
I T0 (P3.4): Timer 0 external input
I T1 (P3.5): Timer 1 external input
O WR (P3.6): External data memory write strobe
O RD (P3.7): External data memory read strobe
I Reset: A high on this pin for two machine cycles while the oscillator is running,
resets the device. An internal resistor to VSS permits a power-on reset using only
an external capacitor to VCC.
O Address Latch Enable: Output pulse for latching the low byte of the address
during an access to external memory. In normal operation, ALE is emitted twice
every machine cycle, and can be used for external timing or clocking. Note that one
ALE pulse is skipped during each access to external data memory. ALE can be
disabled by setting SFR auxiliary.0. With this bit set, ALE will be active only during a
MOVX instruction.
2003 Jan 24
7

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부품번호상세설명 및 기능제조사
P87C51RA2

80C51 8-bit microcontroller family

NXP Semiconductors
NXP Semiconductors

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