参数资料
型号: P87C766
厂商: NXP Semiconductors N.V.
英文描述: Microcontrollers for PAL/SECAM TV with OSD and VST
中文描述: 微控制器对于PAL / SECAM电视的OSD和伟仕
文件页数: 54/92页
文件大小: 382K
代理商: P87C766
1999 Mar 10
54
Philips Semiconductors
Product specification
Microcontrollers for PAL/SECAM TV
with OSD and VST
P8xCx66 family
17.4
OSD clock generator
The clock generator comprises Phase-Locked-Loop circuitry. The frequency of the OSD clock is programmable and is
determined by the decimal value of the contents of the 8-bit OSPLL register. OSD clock frequencies within the range
4 to 12 MHz can be selected in increments of 31.25 kHz. The OSD frequency (f
OSD
) is calculated as shown below:
Where f
HSYNCP
is the horizontal sync frequency after the polarity selection circuit.
17.4.1
OSD PLL R
EGISTER
(OSPLL)
The reset value of OSPLL is 00H.
Table 62
OSD PLL Register (SFR address C4H)
Table 63
Description of OSPLL bits
Table 64
Selection of OSD clock frequency
7
6
5
4
3
2
1
0
PLL7
PLL6
PLL5
PLL4
PLL3
PLL2
PLL1
PLL0
BIT
SYMBOL
DESCRIPTION
7 to 0
PLL7 to PLL0 These 8 bits are used to select the OSD clock frequency. Examples of OSD clock
selection are shown in Table 64.
OSPLL VALUE
OSD FREQUENCY (MHz)
00H
3FH
7FH
BFH
FFH
4.00
6.00
8.00
10.00
12.00
f
OSD
2
f
HSYNCP
129
OSPLL value
+
(
)
×
×
=
Fig.33 OSD PLL.
handbook, halfpage
MGM681
OSPLL
(C4H)
DIVIDER
SYSCLK
÷
2
fOSD
HSYNC
PLL
HSYNCP
LOAD_SFR
RESET
DI
相关PDF资料
PDF描述
P83C766 Microcontrollers for PAL/SECAM TV with OSD and VST
P83C266BDR Microcontrollers for PAL/SECAM TV with OSD and VST
P83C366 Microcontrollers for PAL/SECAM TV with OSD and VST
P83C280 Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc(带DDC接口,同步监测和同步处理的监视器微控制器)
P83C380 Microcontrollers for monitors with DDC interface, auto-sync detection and sync proc(带DDC接口,同步监测和同步处理的监视器微控制器)
相关代理商/技术参数
参数描述
P87L42 制造商:INTEL 制造商全称:Intel Corporation 功能描述:UNIVERSAL PERIPHERAL INTERFACE CHMOS 8-BIT SLAVE MICROCONTROLLER
P87LPC759 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low power, low price, low pin count (14 pin) microcontroller with 1 kbyte OTP
P87LPC759BN 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low power, low price, low pin count (14 pin) microcontroller with 1 kbyte OTP
P87LPC760 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low power, low price, low pin count (14 pin) microcontroller with 1 kbyte OTP
P87LPC760BDH 功能描述:8位微控制器 -MCU 80C51 1K/128 OTP RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT