SDA5523 Micronas Semiconductor, SDA5523 Datasheet - Page 158

• Manufacturer Part Number: SDA5523
• Description: SDA55xx TVText Pro
• Manufacturer: Micronas Semiconductor

SDA 55xx
DATA SHEET
Pin 53, XTAL1 − Input of the inverting oscillator ampli-
fier.
Pin 54, NC − Pin is not connected.
Pin 57, 58, 59, R, G, B − Red, Green, Blue.
Pin 60, BLANK/COR − Blanking and contrast reduc-
tion.
Pin 61, NC − Pin is not connected.
Pin 63, NC − Pin is not connected.
Pin 64, WR − Control output. Indicates a write access
to the internal XRAM. Can be used as a write strobe
for writing data into an external data RAM by a MOVX
instruction. The signal is also available as P4.3.
See Section on page 155.
Pin 65, RD − Control output. Indicates a read access
to the internal XRAM. Can be used for latching data
from the data bus into an external data RAM by a
MOVX instruction. This signal is also available as P4.2
See Section on page 155
Pin 66, NC − Pin is not connected.
Pin 67, 68, 69, A16, A17, A18, A19, P4.0, P4.1, P4.4 −
After power-on P4.0, P4.1, P4.4 work as additional
address lines A17 ... A19. In port mode, these port
lines act as bidirectional I/O-port with internal pul--up
resistors. Port pins that have “1” written to them are
pulled high by the internal pull-up resistors and in that
stage they can be used as inputs.
See Section on page 155.
Pin 70, 71, 76, 77, 78, 79, 81, 82,83, 84, 85, 86, 89,
90, 93, 94, 97, A15, A14, A13, A7, A8, A9, A5, A11,
A4, A3, A10, A2, A1, A0 − Address bus for external
program memory od data RAM.
Pin 72, 80, 95, FL_PGM, FL_RST, FL_CE − All the
pins prefix by FL_ are test pins, which must be left
open.
Pin 87, ALE − Address Latche Enable.
Pin 88, PSEN − Program Store Enable. PSEN is a
control output signal which is usually connected to OE
input line of the external program memory to enable
the data output.
Pin 96, 98, 99, 100, D7, D6, D0, D5 − Data bus for
external memory or data RAM.
158
Micronas
Sept. 10, 2004; 6251-556-3DS