參數(shù)資料
型號(hào): SAA7187
廠商: NXP Semiconductors N.V.
英文描述: Digital video encoder (DENC2-SQ)(數(shù)字視頻編碼器)
中文描述: 數(shù)字視頻編碼器(DENC2 -倚)(數(shù)字視頻編碼器)
文件頁(yè)數(shù): 2/18頁(yè)
文件大小: 197K
代理商: SAA7187
Philips Semiconductors
Clock and synchronization signals of SAA7187 and SAA7188
Application note for digital video encoder
May 1994
2
Figure 1. Timing of internal CREF and expected valid data input, if CREF and
horizontal reference is provided from external into the encoder IC
LLC INPUT
CREF INPUT
A) HS_REF INPUT
A0) HTRIG-LSB = 0
INTERNAL CREF
ACTIVE CLOCK
VALID DATA EXPECTED
A1) HTRIG–LSB = 1
INTERNAL CREF
ACTIVE CLOCK
VALID DATA EXPECTED
Figure 2. Timing of internal CREF based on horizontal reference signal input only
LLC INPUT
CREF INPUT, CONSTANT LOW OR HIGH
B) HS_REF INPUT
A0) HTRIG-LSB = 0
INTERNAL CREF
ACTIVE CLOCK
VALID DATA EXPECTED
A1) HTRIG–LSB = 1
INTERNAL CREF
ACTIVE CLOCK
VALID DATA EXPECTED
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