參數(shù)資料
型號(hào)： T83C5101ZZZ-3ZSIL
廠商： ATMEL CORP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 40 MHz, MICROCONTROLLER, PDIP24
封裝： DIP-24
文件頁(yè)數(shù)： 45/52頁(yè)
文件大小： 701K
代理商： T83C5101ZZZ-3ZSIL
Rev. F - 12 March, 2001
5
T87C5101
T83C5101/02
Mnemonic
Pin
Number
Type
Name and Function
24
pins
28
pins
VSS
12
14
I
Ground: 0V reference
VCC
24
28
I
Power Supply: This is the power supply voltage for normal, idle and power-
down operation
P1.0-P1.7
13-20
15-20
22-23
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. Port 1 also receives the low-order address
byte during memory programming and verification.
Alternate functions for Port 1 include:
I/O
T2 (P1.0): Timer/Counter 2 external count input/Clockout
I
T2EX (P1.1): Timer/Counter 2 Reload/Capture/Direction Control
P4.0
(Prog)-
P4.1 (Test)
7
8
9
O (I)
Port 4 bits 0 & 1: Except during programming and verifying, these two bits
are output port driving 30 micro Amps at high level and sinking 10 mA at low
level (Vol < 1V). If they have 1s written to them, they output a high level and
if they have 0 written to them, they output a low level. These 2 pins cannot be
used as inputs. Users should take care to never externally drive these pins
low, especially during reset. These two pins are primarily designed to drive
LEDs.
During programming and verifying, these two pins are used as input, as explained
in the corresponding chapter.
A Read or a Read/Modify/Write instruction to these bits will read the status of
the output: 1 if the output is 1, 0 if the output is 0.
P4.2-P4.5
NA
27
7
13
21
I/O
Port 4 bits 2 to 5: bidirectional I/O port with internal pull-ups. Port 4.2 to 4.5
pins that have 1s written to them are pulled high by the internal pull-ups and
can be used as inputs. As inputs, Port 4.2 to 4.5 pins that are externally pulled
low will source current because of the internal pull-ups.
P3.0-P3.7
5-1
23-21
5-1
26-24
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.
5
I
RxD (P3.0): Serial input port
4
O
TxD (P3.1): Serial output port
33
I
INT0 (P3.2): External interrupt 0
22
I
INT1 (P3.3): External interrupt 1
11
I
T0 (P3.4): Timer 0 external input
23
26
I
T1 (P3.5): Timer 1 external input
22
25
I/O
No alternate function on this pin
21
24
I/O
No alternate function on this pin
Reset
9
10
I
Reset: A high on this pin for two machine cycles while the oscillator is running,
resets the device. An internal diffused resistor to VSS permits a power-on reset
using only an external capacitor to VCC.
VPP
66
I
Programming Supply Voltage: This pin receives the 12.75V programming
supply voltage (VPP) during EPROM programming. During normal operation,
Vpp pin must be tied to Vcc.
XTAL1
11
12
I
Crystal 1: Input to the inverting oscillator amplifier and input to the internal
clock generator circuits.
XTAL2
10
11
O
Crystal 2: Output from the inverting oscillator amplifier
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