SAA5531 Philips Semiconductors, SAA5531 Datasheet - Page 31

• Manufacturer Part Number: SAA5531
• Description: Enhanced TV microcontrollers with On-Screen Display OSD
• Manufacturer: Philips Semiconductors

Philips Semiconductors
9
An automatic reset can be obtained when V
by connecting the RESET pin to V
capacitor, providing the V
1 ms, and the oscillator start-up time does not exceed
10 ms.
To ensure correct initialisation, the RESET pin must be
held HIGH long enough for the oscillator to settle following
power-up, usually a few milli-seconds. Once the oscillator
is stable, a further 24 clocks are required to generate the
reset (two machine cycles of the microcontroller). Once
the above reset condition has been detected an internal
reset signal is triggered which remains active for
2048 clock cycles.
2000 Feb 23
handbook, full pagewidth
Enhanced TV microcontrollers with
On-Screen Display (OSD)
POWER-ON RESET
MOVX @ Ri,A
MOVX A, @ Ri
DD
rise time does not exceed
DDP
Fig.11 Indirect addressing of Auxiliary RAM.
through a 10 F
DD
FFH
FFH
FFH
FFH
00H
00H
00H
00H
is turned on
SFR XRAMP = FFH
SFR XRAMP = FEH
SFR XRAMP = 01H
SFR XRAMP = 00H
31
MBK958
FFFFH
FF00H
FEFFH
FE00H
01FFH
0100H
00FFH
0000H
MOVX @ DPTR,A
MOVX A, @ DPTR
Preliminary specification
SAA55xx