- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382321 > MD80C51 (Intel Corp.) CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER PDF資料下載
參數(shù)資料
| 型號： | MD80C51 |
| 廠商： | Intel Corp. |
| 英文描述： | CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER |
| 中文描述： | CHMOS單片8位微控制器 |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 229K |
| 代理商： | MD80C51 |
AUTOMOTIVE 80C31BH/80C51BH/87C51
Diagrams are for pin reference only. Package sizes are not to scale.
270419–3
Pin (PDIP)
*
EPROM only
**
Do not connect reserved pins
270419–4
Pad (PLCC)
Figure 3. Pin Connections
PIN DESCRIPTION
V
CC
:
Supply voltage during normal, Idle, and Power
Down operations.
V
SS
:
Circuit ground.
V
SS1
:
ground. Provided to reduce ground bounce and im-
prove power supply bypassing.
V
SS1
D(EPROM
PLCC
only)
secondary
NOTE:
This pin is not a substitute for the V
SS
pin (pin 22).
For ROM and ROMless, pin 1 is reservedDdo not
connect.
Port 0:
Port 0 is an 8-bit open drain bidirectional I/O
port. As an output port each pin can sink 8 LS TTL
inputs. Port 0 pins that have 1s written to them float,
and in that state can be used as high-impedance
inputs.
Port 0 is also the multiplexed low-order address and
data bus during accesses to external memory. In this
application it uses strong internal pullups when emit-
ting 1s.
Port 0 also receives the code bytes during EPROM
programming, and outputs the code bytes during
program verification. External pullups are required
during program verification.
Port 1:
Port 1 is an 8-bit bidirectional I/O port with
internal pullups. Port 1 pins that have 1s written to
them are pulled high by the internal pullups, and in
that state can be used as inputs. As inputs, Port 1
pins that are externally being pulled low will source
current (I
IL
, on the datasheet) because of the inter-
nal pullups.
Port 1 also receives the low-order address bytes
during EPROM programming and program verifica-
tion.
Port 2:
Port 2 is an 8-bit bidirectional I/O port with
internal pullups. Port 2 pins that have 1s written to
them are pulled high by the internal pullups, and in
that state can be used as inputs. As inputs, Port 2
pins that are externally being pulled low will source
current (I
IL
, on the data sheet) because of the inter-
nal pullups.
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
address (MOVX
@
DPTR). In this application it uses
strong internal pullups when emitting 1s.
During accesses to external Data Memory that use
8-bit addresses (MOVX
@
Ri), Port 2 emits the con-
tents of the P2 Special Function Register.
Port 2 also receives some control signals and the
high-order address bits during EPROM programming
and program verification.
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 in
that state can be used as inputs. As inputs, Port 3
pins that are externally being pulled low will source
current (I
IL
, on the datasheet) because of the pull-
ups.
4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MD8284N | Clock Generator and Driver for 8066, 8088 Processors |
| MD8284N-1 | Clock Generator and Driver for 8066, 8088 Processors |
| MD8284N-1B | Clock Generator and Driver for 8066, 8088 Processors |
| MD8284NB | Clock Generator and Driver for 8066, 8088 Processors |
| MD8286 | OCTAL BUS TRANSCEIVER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MD80C51BH | 制造商:ROCHESTER 制造商全稱:ROCHESTER 功能描述:CMOS SINGLE - CHIP 8-BIT MICROCOMPUTER 64K program Memory Space |
| MD80C51FB | 制造商:Rochester Electronics LLC 功能描述: |
| MD80C86 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS 16-Bit Microprocessor |
| MD80C862 | 制造商:Intel 功能描述:PROCESSOR:MICRO-PROCESSOR |
| MD80C86-2 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS 16-Bit Microprocessor |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。