參數(shù)資料
型號(hào)： PCA84C646
廠商： NXP Semiconductors N.V.
英文描述： Microcontrollers for TV tuning control and OSD applications(應(yīng)用于TV調(diào)頻和OSD的微控制器)
中文描述： 微控制器的控制和調(diào)整（應(yīng)用于電視調(diào)頻和OSD的微控制器應(yīng)用的電視OSD）
文件頁數(shù)： 26/72頁
文件大?。?/td> 564K
代理商： PCA84C646
1995 Jun 15
26
Philips Semiconductors
Preliminary specification
Microcontrollers for TV tuning
control and OSD applications
PCA84C646; PCA84C846
12.2
Derivative Register 23 (CON2)
Table 24
Derivative Register 23
Table 25
Description of Derivative Register 23 bits
7
6
5
4
3
2
1
0
VINT
VIEN
P14LVL
P7LVL
P6LVL
BIT
SYMBOL
DESCRIPTION
7
VINT
Bit VINT indicates if the interrupt comes from VSYNC (if VINT = 1 and VIEN = 1) or
I
2
C-bus when the CPU gets interrupted by interrupt vector address 7.
The VSYNC leading edge (active level detection automatically done by the
PCA84C646/PCA84C846) generates an interrupt if bit VIEN = 1 and the SIO interrupt is
enabled (i.e. the I
2
C-bus and the VSYNC interrupt shares the same interrupt vector).
These three bits are reserved.
Polarity select bit for output TDA. When:
P14LVL = 1; the TDAC output is inverted.
P14LVL = 0; the TDAC output is not inverted.
Polarity select bit for outputs PWM00 to PWM03. When:
P7LVL = 1; the outputs PWM00 to PWM03 are inverted.
P7LVL = 0; the outputs PWM00 to PWM03 are not inverted.
Polarity select bit for outputs PWM04 to PWM07. When:
P6LVL = 1; the outputs PWM04 to PWM07 are inverted.
P6LVL = 0; the outputs PWM04 to PWM07 are not inverted.
6
VIEN
5 to 4
2
P14LVL
1
P7LVL
0
P6LVL
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