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| 型号： | P87C51FA–5B |
| 厂商： | NXP Semiconductors N.V. |
| 英文描述： | 80C51 8-bit microcontroller family 8K-64K/256-1K OTP/ROM/ROMless. low voltage 2.7V-5.5V). low power. high speed (33 MHz) |
| 中文描述： | 80C51的8位单片机系列8K-64K/256-1K检察官办公室/光盘/无ROM。低电压为2.7V至5.5V）。低功耗。高速（33兆赫） |
| 文件页数： | 7/34页 |
| 文件大小： | 394K |
| 代理商： | P87C51FA–5B |
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2001 Apr 06
7
Philips Semiconductors
Preliminary specification
P87C51MB2/P87C51MC2
80C51 8-bit microcontroller family with extended memory
64KB/96KB OTP with 2KB/3KB RAM
PIN DESCRIPTIONS
MNEMONIC
P0.0 - P0.7
PIN NO.
43 - 36
TYPE NAME AND FUNCTION
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-impendance 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. (Note: When SFR bit SPEN (SPCTL.6) is ’1’, the pull-ups at P1.4 and
P1.5 are disabled.)
I/O
P1.0
T2
Timer/Counter 2 external count input/Clockout
I
P1.1
T2EX
Timer/Counter 2 Reload/Capture/Direction Control
I
P1.2
ECI
External Clock Input to the PCA
I/O
P1.3
CEX0
Capture/Compare External I/O for PCA module 0
I/O
P1.4
CEX1
Capture/Compare External I/O for PCA module 1 (with pull-up on
pin)
I/O
MOSI
SPI Master Out/Slave In (Selected when SFR bit SPEN (SPCTL.6)
is ’1’, in which case the pull-up for this pin is disabled)
P1.0 - P1.7
2 - 9
2
3
4
5
6
7
I/O
P1.5
CEX2
Capture/Compare External I/O for PCA module 2 (with pull-up on
pin)
SPI Clock (Selected when SFR bit SPEN (SPCTL.6) is ’1’, in which
case the pull-up for this pin is disabled)
Capture/Compare External I/O for PCA module 3
Capture/Compare External I/O for PCA module 4
Port 2:
Port 2 is a 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: I
IL
). 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) or 23-bit addresses
(MOVX @EPTR, EMOV). 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), port2
emits the contents of the P2 Special Function Register.
Note that when 23-bit address is used, address bits A16-A22 will be output to P2.0-P2.6
when ALE is High, and address bits A8-A14 are output to P2.0-P2.6 when ALE is Low.
Address bit A15 is output on P2.7 regardless of ALE.
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 pulled low will source current because of the internal
pull-ups.
P3.0
RXD0
Serial input port 0
P3.1
TXD0
Serial output port 0
P3.2
INT0
External interrupt 0
P3.3
INT1
External interrupt 1
P3.4
T0
Timer0 external input
P3.5
T1
Timer1 external input
P3.6
WR
External data memory write strobe
P3.7
RD
External data memory read strobe
I/O
SPICLK
8
9
I/O
I/O
I/O
P1.6
P1.7
CEX3
CEX4
P2.0 - P2.7
24 - 31
P3.0 - P3.7
11,13 -19
I/O
11
13
14
15
16
17
18
19
I
O
I
I
I
I
O
O
相关PDF资料 |
PDF描述 |
|---|---|
| P87C51FA–5N | 80C51 8-bit microcontroller family 8K-64K/256-1K OTP/ROM/ROMless. low voltage 2.7V-5.5V). low power. high speed (33 MHz) |
| P87C51FA–IA | 80C51 8-bit microcontroller family 8K-64K/256-1K OTP/ROM/ROMless. low voltage 2.7V-5.5V). low power. high speed (33 MHz) |
| P87C51FA–IB | 80C51 8-bit microcontroller family 8K-64K/256-1K OTP/ROM/ROMless. low voltage 2.7V-5.5V). low power. high speed (33 MHz) |
| P87C51FA–IN | 80C51 8-bit microcontroller family 8K-64K/256-1K OTP/ROM/ROMless. low voltage 2.7V-5.5V). low power. high speed (33 MHz) |
| P87C51FA–JA | 80C51 8-bit microcontroller family 8K-64K/256-1K OTP/ROM/ROMless. low voltage 2.7V-5.5V). low power. high speed (33 MHz) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| P87C51FA–5B | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family 8K-64K/256-1K OTP/ROM/ROMless. low voltage 2.7V-5.5V). low power. high speed (33 MHz) |
| P87C51FA5N | 制造商:PHILIP 功能描述: |
| P87C51FA-5N | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:8-bit CMOS (low voltage, low power and high speed) microcontroller families |
| P87C51FA–5N | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family 8K-64K/256-1K OTP/ROM/ROMless. low voltage 2.7V-5.5V). low power. high speed (33 MHz) |
| P87C51FA-IA | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family 8K.64K/256.1K OTP/ROM/ROMless, low voltage 2.7V.5.5V, low power, high speed 33 MHz |
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