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TSC80251G1D-16CA Fiches technique(PDF) 7 Page - TEMIC Semiconductors

No de pièce TSC80251G1D-16CA
Description  Extended 8-bit Microcontroller with Serial Communication
Download  52 Pages
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Fabricant  TEMIC [TEMIC Semiconductors]
Site Internet  http://www.temic.de
Logo TEMIC - TEMIC Semiconductors

TSC80251G1D-16CA Fiches technique(HTML) 7 Page - TEMIC Semiconductors

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TSC87251G1A
7
Rev. A
September 21, 1998
Alternate
Function
Description
Type
Signal
Name
T2
I/O
Timer 2 Clock Input/Output
For the timer 2 capture mode, T2 is the external clock input. For the Timer 2 clock–out mode,
T2 is the clock output.
P1.0
T2EX
I
Timer 2 External Input
In timer 2 capture mode, a falling edge initiates a capture of the timer 2 registers. In auto–reload
mode, a falling edge causes the timer 2 register to be reloaded. In the up–down counter mode,
this signal determines the count direction: 1= up, 0= down.
P1.1
TXD
I/O
Transmit Serial Data
TXD outputs the shift clock in serial I/O mode 0 and transmits data in serial I/O modes 1, 2 and 3.
P3.1
VDD
PWR
Digital Supply Voltage
Connect this pin to +5V or +3V supply voltage.
VSS
GND
Circuit Ground
Connect this pin to ground.
VSS1
GND
Secondary Ground 1
This ground is provided to reduce ground bounce and improve power supply bypassing. Con-
nection of this pin to ground is recommended. However, when using the TSC87251G1A as a
pin–for–pin replacement for a 8xC51 product, VSS1 can be unconnected without loss of com-
patibility.
Not available on DIP package.
VSS2
GND
Secondary Ground 2
This ground is provided to reduce ground bounce and improve power supply bypassing. Con-
nection of this pin to ground is recommended. However, when using the TSC87251G1A as a
pin–for–pin replacement for a 8xC51 product, VSS2 can be unconnected without loss of com-
patibility.
Not available on DIP package.
VPP
I
Programming Supply Voltage
The programming supply voltage is applied to this input for programming the on–chip EPROM/
OTPROM
WR#
O
Write
Write signal output to external memory.
P3.6
XTAL1
I
Input to the on–chip inverting oscillator amplifier
To use the internal oscillator, a crystal/resonator circuit is connected to this pin. If an external
oscillator is used, its output is connected to this pin. XTAL1 is the clock source for internal tim-
ing.
XTAL2
O
Output of the on–chip inverting oscillator amplifier
To use the internal oscillator, a crystal/resonator circuit is connected to this pin. If an external
oscillator is used, leave XTAL2 unconnected.
Note:
1. The description of A15:8/P2.7:0 and AD7:0/P0.7:0 are for the non–page mode chip configuration. If the chip is configured in page mode
operation, port 0 carries the lower address bits (A7:0) while port 2 carries the upper address bits (A15:8) and the data (D7:0).


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