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參數(shù)資料
| 型號： | MJ-80C32E-30-E |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Rad. Tolerant 8-bit ROMless Microcontroller |
| 中文描述： | 8-BIT, 30 MHz, MICROCONTROLLER, QCC44 |
| 封裝： | QFP-44 |
| 文件頁數(shù)： | 3/20頁 |
| 文件大?。?/td> | 298K |
| 代理商： | MJ-80C32E-30-E |
3
80C32E
4149M–AERO–06/04
Pin Description
Mnemonic
Type
Name and Function
V
SS
I
Ground:
0V reference
V
CC
I
Power Supply:
This is the power supply voltage for normal, idle and
power-down operation
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 pins must be polarized to Vcc or Vss in order to prevent any
parasitic current consumption. Port 0 is also the multiplexed low-order
address and data bus during access to external program and data
memory. In this application, it uses strong internal pull-up when emitting
1s.
P1.0-P1.7
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.
P2.0-P2.7
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
pulled low will source current because of the internal pull-ups. 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 emitting 1s. During accesses to external data memory that use
8-bit addresses (MOVX @Ri), port 2 emits the contents of the P2 SFR.
P3.0-P3.7
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
pulled low will source current because of the internal pull-ups. Port 3 also
serves the special features of the 80C51 family, as listed below.
I
RXD (P3.0):
Serial input port
O
TXD (P3.1):
Serial output port
I
INT0 (P3.2):
External interrupt 0
I
INT1 (P3.3):
External interrupt 1
I
T0 (P3.4):
Timer 0 external input
I
T1 (P3.5):
Timer 1 external input
O
WR (P3.6):
External data memory write strobe
O
RD (P3.7):
External data memory read strobe
RST
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
CC.
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