參數(shù)資料
型號(hào)： SAA5564
廠商： NXP Semiconductors N.V.
英文描述： Enhanced TV microcontrollers with On-Screen Display OSD
中文描述： 與微控制器在強(qiáng)化電視屏幕顯示OSD
文件頁(yè)數(shù)： 39/100頁(yè)
文件大小： 371K
代理商： SAA5564
2000 Feb 23
39
Philips Semiconductors
Preliminary specification
Enhanced TV microcontrollers with
On-Screen Display (OSD)
SAA55xx
16 I
2
C-BUS SERIAL I/O
The I
2
C-bus consists of a serial data line (SDA) and a
serial clock line (SCL). The definition of the I
2
C-bus
protocol can be found in Reference 2.
The device operates in four modes
Master transmitter
Master receiver
Slave transmitter
Slave receiver.
The microcontroller peripheral is controlled by the Serial
Control SFR (S1CON) and its status is indicated by the
Status SFR (S1STA). Information is transmitted/received
to/from the I
2
C-bus using the Data SFR (S1DAT) and the
Slave Address SFR (S1ADR) is used to configure the
slave address of the peripheral.
The byte level I
2
C-bus serial port is identical to the I
2
C-bus
serial port on the P8xC558, except for the clock rate
selection bits CR<2:0>. The operation of the subsystem is
described in detail in the “P8xC558 data sheet”.
16.1
I
2
C-bus port selection
Two I
2
C-bus ports are available SCL0/SDA0 and
SCL1/SDA1. The selection of the port is done using
TXT21.I
2
C PORT 0 and TXT21.I
2
C PORT 1. When the
port is enabled, any information transmitted from the
device goes onto the enabled port. Any information
transmitted to the device can only be acted on if the port is
enabled.
If both ports are enabled then data transmitted from the
device is seen on both ports, however data transmitted to
the device on one port can not be seen on the other port.
17 MEMORY INTERFACE
The memory interface controls access to the embedded
DRAM, refreshing of the DRAM and page clearing.
The DRAM is shared between Data Capture, display and
microcontroller sections.
The Data Capture section uses the DRAM to store
acquired information that has been requested. The display
readsfromthe DRAMinformation and convertsit intoRGB
values. The microcontroller uses the DRAM as embedded
auxiliary RAM.
17.1
Memory structure
The memory is partitioned into two distinct areas, the
dedicated Auxiliary RAM area, and the Display RAM area.
The Display RAM area when not being used for Data
Capture or display can be used as an extension to the
Auxiliary RAM area.
17.1.1
A
UXILIARY
RAM
The Auxiliary RAM is not initialized at power-up.
The applicationsoftwaremustinitializethisAuxiliaryRAM.
The contents of the Auxiliary RAM are maintained during
Idle mode, but are lost if Power-down mode is entered.
17.1.2
D
ISPLAY
RAM
The Display RAM is initialised on power-up to a value of
20H throughout. The contents of the Display RAM are
maintained when entering Idle mode. If Idle mode is exited
using an interrupt then the contents are unchanged, if Idle
mode is exited using a RESET then the contents are
initialised to 20H.
Full Closed Caption display requires display RAM from
8000H to 845FH. The memory from 846H to 84FFH (must
be initialized by the application software) can be utilized as
an extension to the dedicated contiguous Auxiliary RAM
that occupies 0000H to 07FFH.
17.2
Memory mapping
The dedicated Auxiliary RAM area occupies 2 kbytes, with
an address range from 0000H to 07FFH. The Display
RAM occupies a maximum of 10 kbytes with an address
range from 2000H to 47FFH for TXT mode and
8000H to 84FFH for CC mode (see Fig.14). The two
modes although having different address ranges occupy
physically the same DRAM area.
17.3
Addressing memory
The memory can be addressed by the microcontroller in
two ways, either directly using a MOVX command, or via
Special Function Registers depending on what address is
required.
The dedicated Auxiliary RAM, and Display memory in the
range 8000H to 84FFH, can only be accessed using the
MOVX command.
The Display memory in the range 2000H to 47FFH can
either be directly accessed using the MOVX, or via the
Special Function Registers.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAA5564PS 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display OSD
SAA5565 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display OSD
SAA5565PS 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display OSD
SAA55XX 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:TV microcontrollers with Closed Captioning (CC) and On-Screen Display (OSD)
SAA5603 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
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