saa5290 NXP Semiconductors, saa5290 Datasheet - Page 5

• Manufacturer Part Number: saa5290
• Description: Page Economy Teletext/tv Microcontroller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
February 1995
VSYNC
V
V
OSCGND
OSCIN
OSCOUT
RESET
V
P1.0/INT1
P1.1/T0
P1.2/INT0
P1.3/T1
P1.6/SCL
P1.7/SDA
P1.4
P1.5
DDA
DDT
DDM
One page Economy Teletext/TV
microcontroller
SYMBOL
PIN
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
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.
+5 V analog power supply.
+5 V teletext power supply.
Crystal oscillator ground.
12 MHz crystal oscillator input.
12 MHz crystal oscillator output.
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 V
capacitor.
+5 V microcontroller power supply.
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 I
data port for the I
2
C-bus.
5
DESCRIPTION
2
C-bus. P1.7/SDA is the serial
Preliminary specification
DDM
SAA5290
via a 2.2 F