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參數資料
| 型號： | P89C669BBD |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 80C51 8-bit microcontroller family with extended memory 96 kB Flash with 2 kB RAM |
| 中文描述： | 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-389-1, LQFP-44 |
| 文件頁數： | 8/33頁 |
| 文件大小： | 827K |
| 代理商： | P89C669BBD |
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Philips Semiconductors
P89C669
80C51 8-bit microcontroller family with extended memory
Product data
Rev. 02 — 13 November 2003
8 of 33
9397 750 12299
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
6.2 Pin description
Table 3:
Symbol
Pin description
Pin
PLCC
43 - 36
Type
Description
LQFP
30 - 37
P0.0 - P0.7
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.
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.
P1.0, T2
–
Timer/Counter 2 external count input/Clock out
P1.1, T2EX
–
Timer/Counter 2 Reload/Capture/Direction Control
P1.2, ECI
–
External Clock Input to the PCA
P1.3, CEX0
–
Capture/Compare External I/O for PCA module 0
P1.4, CEX1
–
Capture/Compare External I/O for PCA module 1 (with pull-up on pin)
P1.5, CEX2
–
Capture/Compare External I/O for PCA module 2 (with pull-up on pin)
P1.6, SCL
–
I
2
C serial clock (when I
2
C is used, this pin is open-drain and requires
external pull-up due to I
2
C-bus specification)
P1.7, SDA
–
I
2
C serial data (when I
2
C is used, this pin is open-drain and requires
external pull-up due to I
2
C-bus specification)
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
Section 9 “Static
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),
port 2 emits the contents of the P2 Special Function Register.
Note that when 23-bit address is used, address bits A16-A22 will be outputted to
P2.0-P2.6 when ALE is HIGH, and address bits A8-A14 are outputted to
P2.0-P2.6 when ALE is LOW. Address bit A15 is outputted on P2.7 regardless of
ALE.
P1.0 - P1.7
2 - 9
1 - 3,
40 - 44
I/O
2
40
I/O
3
41
I
4
42
I
5
43
I/O
6
44
I/O
7
1
I/O
8
2
I/O
9
3
I/O
P2.0 - P2.7
24 - 31
18 - 25
I/O
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