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SAA5290 Datasheet(PDF) 5 Page - NXP Semiconductors

No. de Pieza. SAA5290
Descripción  Economy teletext and TV microcontrollers
Descarga  33 Pages
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Fabricante  PHILIPS [NXP Semiconductors]
Página de inicio  http://www.nxp.com
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SAA5290 Datasheet(HTML) 5 Page - NXP Semiconductors

 
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February 1995
5
Philips Semiconductors
Preliminary specification
One page Economy Teletext/TV
microcontroller
SAA5290
VSYNC
37
Vertical sync dedicated input for a TTL-level version of the vertical sync pulse. The
polarity of this pulse is programmable by register bit TXT1.V POLARITY.
VDDA
38
+5 V analog power supply.
VDDT
39
+5 V teletext power supply.
OSCGND
40
Crystal oscillator ground.
OSCIN
41
12 MHz crystal oscillator input.
OSCOUT
42
12 MHz crystal oscillator output.
RESET
43
If the reset input is HIGH for 2 machine cycles (24 oscillator periods) while the oscillator
is running, the SAA5290 is reset. This pin should be connected to VDDM via a 2.2 µF
capacitor.
VDDM
44
+5 V microcontroller power supply.
P1.0/INT1
45
PORT 1: 8-bit open-drain bidirectional port with alternative functions. P1.0/INT1 is
external interrupt 1 which can be triggered on the rising and falling edge of the pulse.
P1.1/T0 is the counter/timer 0. P1.2/INT0 is external interrupt 0. P1.3/T1 is the
counter/timer 1. P1.6/SCL is the serial clock input for I2C-bus. P1.7/SDA is the serial
data port for the I2C-bus.
P1.1/T0
46
P1.2/INT0
47
P1.3/T1
48
P1.6/SCL
49
P1.7/SDA
50
P1.4
51
P1.5
52
SYMBOL
PIN
DESCRIPTION


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