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參數(shù)資料
| 型號： | SAA567X |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Enhanced TV microcontrollers with On-Screen Display (OSD) |
| 中文描述： | 與微控制器在強化電視屏幕顯示（OSD） |
| 文件頁數(shù)： | 106/116頁 |
| 文件大?。?/td> | 532K |
| 代理商： | SAA567X |
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2002 May 06
106
Philips Semiconductors
Objective specification
Enhanced TV microcontrollers with
On-Screen Display (OSD)
SAA567x; SAA569x
30.1.1
A
PPLICATION NOTES
Ports AD0 to AD7 of the microcontroller can be connected
to pins D0 to D7 of the SRAM in any order.
For the addressing, the lower group of address lines
(A0 to A8) and the upper group of address lines
(A9 to A14, A15_BK, RAMBK0 and RAMBK1) may be
connectedinanyorderwithinthegroups,providedthat the
full 256 kbytes of external SRAM is used.
Fig.47 shows the application diagram for multipage.
When using an external SRAM smaller than 256 kbytes,
the relevant number of bits from the microcontroller
addressbusshouldbedisconnected,alwaysremovingthe
most significant bits first.
For power saving modes, it might be advisable to control
the CE pin of the SRAM module(s) using one of the
microcontroller ports to de-select the SRAM.
30.1.2
E
XTERNAL DATA MEMORY ACCESS
Table 48
External data memory access:
see Figures 48 and 49
Note
1.
The external SRAM is intended to be used with the
multipage software, therefore only the 12 MHz clock
microcontroller timings are provided.
30.1.2.1
Symbol explanations
Eachtimingsymbolhasfivecharacters.Thefirstcharacter
is always ‘t’ (time). Depending on their positions, the other
characters indicate the name of a signal or the logical
status of that signal. The designations are:
A = address
C = clock
D = input data
H = logic level HIGH
I = instruction (program memory contents)
L = logic level LOW or ALE
P = PSEN
Q = output data
R = RD signal
t = time
V = valid
W = WR signal
X = no longer a valid logic level
Z = float
Examples:
– t
AVLL
= Time for address valid to ALE LOW
– t
LLPL
= Time for ALE to PSEN LOW.
SYMBOL
PARAMETER
TYPICAL
(1)
UNIT
t
RLRH
t
WLWH
t
RLDV
t
RHDX
t
RHDZ
t
LLWL
RD pulse width
WR pulse width
RD LOW to valid data in 198
Data hold after RD
Data float after RD
ALE LOW to RD or
WR LOW
Address valid to WR
LOW or RD LOW
Data valid to WR LOW
Data hold after WR
RD LOW to address
float
RD or WR HIGH to
ALE HIGH
250
250
ns
ns
ns
ns
ns
ns
0
tbf
132
t
AVWL
172
ns
t
QVWX
t
WHQX
t
RLAZ
89
15
tbf
ns
ns
ns
t
WHLH
40
ns
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA5695HL | Enhanced TV microcontrollers with On-Screen Display (OSD) |
| SAA569x | Enhanced TV microcontrollers with On-Screen Display (OSD) |
| SAA5677HL | Enhanced TV microcontrollers with On-Screen Display (OSD) |
| SAA5700GP | Chinese Character System Teletext CCST decoder |
| SAA5700 | Chinese Character System Teletext CCST decoder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA5695HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display (OSD) |
| SAA5697HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display (OSD) |
| SAA569X | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display (OSD) |
| SAA5700 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Chinese Character System Teletext CCST decoder |
| SAA5700GP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Chinese Character System Teletext CCST decoder |
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