參數(shù)資料
型號(hào): W78CE354P
廠商: WINBOND ELECTRONICS CORP
英文描述: MONITOR MICROCONTROLLER
中文描述: 顯示器單片機(jī)
文件頁(yè)數(shù): 32/44頁(yè)
文件大?。?/td> 426K
代理商: W78CE354P
W78C354
- 32 -
F
CLOCK
16 MHz
18.432 MHz
20 MHz
1/Fclock
62.5 nS
54 nS
50 nS
Min. Vsync width (Wvmin)
8031
±
31 nS
8031
±
31 nS
6939
±
27 nS
6939
±
27 nS
6425
±
25 nS
6425
±
25 nS
V
OUT
delay from V
IN
(Tdelay)
H
vmin
1. Withot composite sync
H
V
V
2. With composite sync
delay
T
W
H
IN
V
IN
H
OUT
V
OUT
IN
(H+V)
IN
OUT
OUT
ò
Figure 12. Vsync separator output (when DUMMYEN = 0, ENVS = 1)
M-3. Horizontal & Vertical Frequency Counter
There are two 16-bit counters that automatically count the horizontal and vertical frequency. When a
VEVENT interrupt occurs, the W78C354 reads the count value (H
COUNT
and V
COUNT
) from the 8-bit
counter registers (HFCOUNTH, HFCOUNTL, VFCOUNTH, and VFCOUNTL) to calculate the H and V
frequency by the formulas listed below.
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