參數(shù)資料
型號: SAA5667HL
廠商: NXP Semiconductors N.V.
英文描述: Enhanced TV microcontrollers with On-Screen Display (OSD)(帶全屏顯示的增強(qiáng)型TV控制器)
中文描述: 與微控制器在強(qiáng)化電視屏幕顯示(OSD)(帶全屏顯示的增強(qiáng)型電視控制器)
文件頁數(shù): 37/112頁
文件大小: 436K
代理商: SAA5667HL
2000 Jun 30
37
Philips Semiconductors
Objective specification
Enhanced TV microcontrollers with
On-Screen Display (OSD)
SAA56xx
handbook, full pagewidth
GSA070
XRAMP SFR = 00H
FFH
00H
XRAMP SFR = 01H
FFH
00H
0000H
00FFH
0100H
01FFH
XRAMP SFR = FEH
MOVX @ DPTR,A
MOVX A, @ DPTR
MOVX @ Ri,A
MOVX A, @ Ri
FFH
00H
0800H
08FFH
Allocated
(1)
Allocated
(1)
Not Allocated
Not Allocated
XRAMP SFR = FFH
FFH
00H
2000H
20FFH
XRAMP SFR = FFH
FFH
00H
4000H
4FFFH
XRAMP SFR = FFH
FFH
00H
FF00H
FFFFH
Fig.9 Indirect addressing of MOVX RAM.
(1) Internal 14-kbyte data and display RAM of the device.
9
POWER-ON RESET
Two reset inputs are present on the device, the RESET pin
beingactiveHIGHandRESETpinbeingactiveLOW.Only
one of these inputs need be connected in the system as
they are ORed internally to the device and each pin has
the necessary pull-down (for RESET) and pull-up (for
RESET) resistors at the pad.
An automatic reset can be obtained when V
DD
is switched
on by connecting the RESET pin to V
DDP
through a
10
μ
F capacitor, providing the V
DD
rise time does not
exceed 1 ms, and the oscillator start-up time does not
exceed 10 ms.
Alternatively,acapacitorconnectedtoV
SSP
withasuitable
pull-up(to V
DDP
)(e.g. 10
μ
F capacitor; 16 k
resistor)can
be connected to the RESET pin.
To ensure correct initialisation, the RESET/RESET pin
must be held HIGH/LOW long enough for the oscillator to
settle following power-up, usually a few milliseconds
(application specific, typically 10 ms). Once the oscillator
is stable, a further 24 crystal clocks are required to
generate the reset. Once the above reset condition has
been detected, an internal reset signal is triggered (which
remains active for 2048 clock cycles).
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