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參數(shù)資料
| 型號： | P83C851FBB |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-Bit Buffers/Drivers with 3-State Outputs 48-TSSOP -40 to 85 |
| 中文描述： | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | 10 X 10 X 1.75 MM, PLASTIC, QFP-44 |
| 文件頁數(shù)： | 5/22頁 |
| 文件大小： | 182K |
| 代理商： | P83C851FBB |
Philips Semiconductors
Product specification
80C851/83C851
CMOS single-chip 8-bit microcontroller
with on-chip EEPROM
1998 Jul 03
5
PIN DESCRIPTION
PIN NO.
MNEMONIC
DIP
LCC
QFP
TYPE
NAME AND FUNCTION
V
SS
20
22
16, 39
I
Ground:
0V reference.
V
DD
40
44
38
I
Power Supply:
This is the power supply voltage for normal, idle, and power-down
operation.
P0.0–0.7
39–32
43–36
37–30
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.
P1.0–P1.7
1–8
2–9
40–44,
1–3
I/O
Port 1:
Port 1 is an 8-bit bidirectional I/O port with internal pull-ups. 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: I
IL
).
P2.0–P2.7
21–28
24–31
18–25
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: I
). 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.
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 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: I
IL
). Port 3 also serves the special features
of the SC80C51 family, as 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
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
O
I
I
I
I
O
O
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 diffused resistor to V
SS
permits a power-on reset using only an
external capacitor to V
DD
.
ALE
30
33
27
I/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 at a constant rate of 1/6
the oscillator frequency, and can be used for external timing or clocking. Note that one
ALE pulse is skipped during each access to external data memory.
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.
EA
31
35
29
I
External Access Enable:
If during a RESET, EA is held at TTL, level HIGH, the CPU
executes out of the internal program memory ROM provided the Program Counter is less
than 4096. If during a RESET, EA is held a TTL LOW level, the CPU executes out of
external program memory. EA is not allowed to float.
XTAL1
19
21
15
I
Crystal 1:
Input to the inverting oscillator amplifier and input to the internal clock
generator circuits.
XTAL2
18
20
14
O
Crystal 2:
Output from the inverting oscillator amplifier.
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| P83C851FBP | 16-Bit Buffers/Drivers with 3-State Outputs 48-TSSOP -40 to 85 |
| P80C851FFP | CMOS single-chip 8-bit microcontroller with on-chip EEPROM |
| P83C851FFP | CMOS single-chip 8-bit microcontroller with on-chip EEPROM |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P83C851FBP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontroller with on-chip EEPROM |
| P83C851FFA | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontroller with on-chip EEPROM |
| P83C851FFB | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontroller with on-chip EEPROM |
| P83C851FFP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontroller with on-chip EEPROM |
| P83C851FHA | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontroller with on-chip EEPROM |
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