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TS80C52X2ZZZ-MIB Datasheet(PDF) 6 Page - ATMEL Corporation

No. de pieza TS80C52X2ZZZ-MIB
Descripción Electrónicos  8-bit Microcontroller 8 Kbytes ROM/OTP, ROMless
Download  55 Pages
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Fabricante Electrónico  ATMEL [ATMEL Corporation]
Página de inicio  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

TS80C52X2ZZZ-MIB Datasheet(HTML) 6 Page - ATMEL Corporation

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TS8xCx2X2
4184I–8051–02/08
Mnemonic
Pin Number
Type
Name and Function
DIL
LCC
VQFP
1.4
VSS
20
22
16
I
Ground: 0V reference
Vss1
1
39
I
Optional Ground: Contact the Sales Office for ground
connection.
VCC
40
44
38
I
Power Supply: This is the power supply voltage for normal,
idle and power-down operation
P0.0-P0.7
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 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.
Port 0 also inputs the code bytes during EPROM
programming. External pull-ups are required during program
verification during which P0 outputs the code bytes.
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. Port 1 also receives
the low-order address byte during memory programming and
verification.
Alternate functions for Port 1 include:
1
2
40
I/O
T2 (P1.0): Timer/Counter 2 external count input/Clockout
2
3
41
I
T2EX (P1.1): Timer/Counter 2 Reload/Capture/Direction
Control
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 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 atDPTR).In this application, it
uses strong internal pull-ups emitting 1s. During accesses to
external data memory that use 8-bit addresses (MOVX atRi),
port 2 emits the contents of the P2 SFR. Some Port 2 pins
receive the high order address bits during EPROM
programming and verification: P2.0 to P2.4
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 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.
10
11
5
I
RXD (P3.0): Serial input port
11
13
7
O
TXD (P3.1): Serial output port
12
14
8
I
INT0 (P3.2): External interrupt 0


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