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| 型号： | 89C52 |
| 厂商： | Integrated Silicon Solution, Inc. |
| 英文描述： | CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 8-Kbytes of FLASH |
| 中文描述： | CMOS单芯片的8位单片机，带有8的快闪记忆体 |
| 文件页数： | 6/50页 |
| 文件大小： | 425K |
| 代理商： | 89C52 |
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IS89C52
6
Integrated Silicon Solution, Inc. — 1-800-379-4774
MC013-1C
11/21/98
ISSI
Symbol
PDIP
PLCC
PQFP
I/O
Name and Function
P3.0-P3.7
10-17
11, 13-19
5, 7-13
I/O
Port 3:
Port 3 is an 8-bit bidirectional I/O port with internal
pullups. Port 3 pins that have 1s written to them are pulled high
by the internal pullups and can be used as inputs. As inputs,
Port 3 pins that are externally pulled low will source current
because of the internal pullups. (See DC Characteristics: I
IL
).
Port 3 also serves the special features of the IS89C52, as listed
below:
10
11
12
13
14
15
16
17
11
13
14
15
16
17
18
19
5
7
8
9
10
11
12
13
I
RxD (P3.0):
Serial input port.
TxD (P3.1):
Serial output port.
INT0
(P3.2):
External interrupt 0.
INT1
(P3.3):
External interrupt 1.
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.
O
I
I
I
I
O
O
PSEN
29
32
26
O
Program Store Enable:
The read strobe to external program
memory. When the device is executing code from the external
program memory,
PSEN
is activated twice each machine cycle
except that two
PSEN
activations are skipped during each
access to external data memory.
PSEN
is not activated during
fetches from internal program memory.
RST
9
10
4
I
Reset:
A high on this pin for two machine cycles while the
oscillator is running, resets the device. An internal MOS resistor
to GND permits a power-on reset using only an external
capacitor connected to Vcc.
XTAL 1
19
21
15
I
Crystal 1:
Input to the inverting oscillator amplifier and input
to the internal clock generator circuits.
XTAL 2
18
20
14
O
Crystal 2:
Output from the inverting oscillator amplifier.
GND
20
22
16
I
Ground:
0V reference.
Vcc
40
44
38
I
Power Supply:
This is the power supply voltage for operation.
Table 1. Detailed Pin Description (continued)
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相关代理商/技术参数 |
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|---|---|
| 89C52-24JC | 制造商: 功能描述: 制造商:undefined 功能描述: |
| 89C52-24PC | 制造商: 功能描述: 制造商:undefined 功能描述: |
| 89C535 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontrollers with FLASH program memory |
| 89C536 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family 16K/64K/512 FLASH |
| 89C538 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontrollers with FLASH program memory |
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