參數(shù)資料
型號: VCT3801A
廠商: MICRONAS SEMICONDUCTOR HOLDING AG
英文描述: Video/Controller/Teletext IC Family
中文描述: 視頻/控制/圖文電視IC系列
文件頁數(shù): 131/172頁
文件大?。?/td> 2243K
代理商: VCT3801A
ADVANCE INFORMATION
VCT 38xxA
Micronas
131
5.18.6.CLK20 Output Port
The CLK20 pin delivers the internal 20.25-MHz clock.
The output stage is push-pull with programmable
driver strength (C20M.DSTR). The CLK20 pin can
alternatively be used as digital output port. It is possi-
ble to force the CLK20 output either to High or Low
(C20M.FSO) or to switch it into tristate mode
(C20M.DOD). After reset, the CLK20 port is enabled.
5.18.6.1. Features
– programmable driver strength
– tristate mode
– digital output port
Fig. 5–8:
CLK20 Port Circuit
DSTR
w000:
w111:
Driver Strength
Output driver strong
Output driver weak
DOD
w1:
w0:
Disable Output Driver
Output driver is high-impedance
Output driver is enabled
FSO
w10:
w11:
Force Static Output
Output driver is forced to 1
Output driver is forced to 0
CLK20
C20M
V
DD
V
SS
CLK20
DB
6
331:
1F9D
332:
C20M
333:
CLK20 Mode Register
bit
7
6
5
4
3
2
1
0
w
FSO
DOD
DSTR
reset
0
0
0
0
0
0
0
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