SAA5500PS Philips Semiconductors, SAA5500PS Datasheet - Page 30

• Manufacturer Part Number: SAA5500PS
• Description: Standard 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
10 F capacitor, providing the V
exceed 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 ms. 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.
1999 Oct 27
handbook, full pagewidth
Standard TV microcontrollers with
On-Screen Display (OSD)
POWER-ON RESET
MOVX @ Ri,A
MOVX A, @ Ri
DD
DDP
rise time does not
Fig.10 Indirect addressing of Auxiliary RAM.
through a
DD
FFH
FFH
FFH
FFH
00H
00H
00H
00H
is turned on
SFR XRAMP = FFH
SFR XRAMP = FEH
SFR XRAMP = 01H
SFR XRAMP = 00H
30
MBK958
FFFFH
FF00H
FEFFH
FE00H
01FFH
0100H
00FFH
0000H
MOVX @ DPTR,A
MOVX A, @ DPTR
Preliminary specification
SAA55xx